Cooling and heat dissipation device for improving safety performance of soft package lithium battery

Abstract

The utility model relates to battery heat dissipation technical field, specifically disclose a cooling heat dissipation device of promoting soft package lithium battery safety performance, including water cooling plate, the inside of water cooling plate is equipped with auxiliary mechanism, the auxiliary mechanism includes the water inlet pipe of setting in the inside of water cooling plate, the arc surface of water inlet pipe is linked with a plurality of shunt, the inside of water cooling plate is equipped with two edge pipes, two edge pipes jointly link with the connecting pipe, the arc surface of connecting pipe is linked with the backflow pipe, the one end of backflow pipe away from connecting pipe penetrates water cooling plate.

Description

Technical Field

[0001] This utility model belongs to the field of battery heat dissipation technology, specifically relating to a cooling and heat dissipation device for improving the safety performance of soft-pack lithium batteries. Background Technology

[0002] The core feature of pouch lithium batteries is that they use flexible packaging materials (rather than metal hard shells) to encapsulate the cells, which combines lightweight, high energy density and design flexibility, and are widely used in consumer electronics, power batteries, energy storage and other fields.

[0003] Lithium batteries continuously release heat during charging and discharging (especially fast charging and high-power discharging). If heat accumulates, it can lead to cell performance degradation, shortened lifespan, and even trigger thermal runaway. Therefore, it is necessary to achieve efficient heat dissipation by attaching a water-cooling plate to the battery surface. However, the existing water-cooling plates use a serpentine bend design for the internal coolant channels. On the one hand, it is difficult for the coolant to be quickly distributed across the entire water-cooling plate when it flows. On the other hand, the serpentine bend design has too large a turning angle and too many bends, which can easily affect the flow speed of the coolant. Utility Model Content

[0004] The purpose of this invention is to provide a cooling and heat dissipation device that improves the safety performance of soft-pack lithium batteries, in order to solve the problem that the internal flow channel design of existing water-cooled plates is not conducive to heat dissipation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A cooling and heat dissipation device for improving the safety performance of soft-pack lithium batteries includes a water-cooled plate. An auxiliary mechanism is provided inside the water-cooled plate. The auxiliary mechanism includes a water inlet pipe disposed inside the water-cooled plate. The arc surface of the water inlet pipe is connected to multiple branch pipes. The water-cooled plate has two side pipes inside. The two side pipes are connected to a connecting pipe. The arc surface of the connecting pipe is connected to a return pipe. The end of the return pipe away from the connecting pipe passes through the water-cooled plate.

[0007] Preferably, the multiple diversion pipes are evenly distributed on both sides of the inlet pipe, and the multiple diversion pipes are grouped in pairs. The diversion pipes in the same group are symmetrically distributed on both sides of the inlet pipe, and the ends of the diversion pipes in the same group that are far apart from each other are respectively connected to two side pipes.

[0008] Preferably, two fixing rods are fixedly connected to both sides of the water-cooled plate, and the four fixing rods are grouped in pairs. The arc surface of the fixing rods in the same group is slidably connected to a clamping plate, and the arc surface of the fixing rods is threadedly connected to a threaded ring.

[0009] Preferably, the surface of the clamping plate is provided with a rectangular groove, and a buffer pad is slidably connected to the inner wall of the rectangular groove.

[0010] Preferably, the inner wall of the rectangular groove is fixedly connected to a plurality of springs, the other end of the plurality of springs is fixedly connected to a rectangular plate, and the buffer pad is fixedly connected to the surface of the rectangular plate.

[0011] Preferably, the rectangular plate is slidably connected inside the rectangular groove, and the buffer pad is a sponge pad.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. By centrally positioning the water inlet pipe and symmetrically arranging multiple branch pipes on the arc surface of the water inlet pipe, the coolant can quickly flow from the middle to both sides when entering the water inlet pipe, which accelerates the flow speed of the coolant and makes the coolant distribution more uniform, which is more conducive to heat dissipation and improves the safety performance of soft-pack lithium batteries to a certain extent.

[0014] 2. This utility model uses clamping plates on both sides of the water-cooling plate and the threaded drive of the threaded ring to clamp the water-cooling plate onto the packaged battery pack, which facilitates the installation of the water-cooling plate. With the help of the spring force and the action of the buffer pad, the clamping plates can play a buffering role when they are squeezed, so as to avoid excessive squeezing force on the battery pack and improve the protection capability of the battery pack to a certain extent. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This utility model Figure 1 A schematic diagram of the internal cross-sectional planar structure;

[0017] Figure 3 This is a schematic diagram of the planar structure of the inlet pipe and return pipe of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal cross-sectional planar structure of the clamping plate of this utility model.

[0019] In the diagram: 1. Water-cooled plate; 2. Auxiliary mechanism; 201. Water inlet pipe; 202. Diverter pipe; 203. Side pipe; 204. Connecting pipe; 205. Return pipe; 206. Fixing rod; 207. Clamping plate; 208. Threaded ring; 209. Rectangular groove; 210. Spring; 211. Rectangular plate; 212. Buffer pad. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-4 As shown, this utility model provides a cooling and heat dissipation device to improve the safety performance of soft-pack lithium batteries, including a water-cooled plate 1. The water-cooled plate 1 is provided with an auxiliary mechanism 2 inside. The auxiliary mechanism 2 includes a water inlet pipe 201 disposed inside the water-cooled plate 1. The arc surface of the water inlet pipe 201 is connected to multiple branch pipes 202. The water-cooled plate 1 is provided with two side pipes 203 inside. The two side pipes 203 are connected to a connecting pipe 204. The arc surface of the connecting pipe 204 is connected to a return pipe 205. The end of the return pipe 205 away from the connecting pipe 204 passes through the water-cooled plate 1.

[0022] In this embodiment, the water inlet pipe 201 penetrates the water-cooling plate 1, and multiple branch pipes 202 are evenly distributed on both sides of the water inlet pipe 201. The multiple branch pipes 202 are grouped in pairs, and the branch pipes 202 in the same group are symmetrically distributed on both sides of the water inlet pipe 201. The ends of the branch pipes 202 in the same group that are far apart from each other are respectively connected to two side pipes 203. By setting the water inlet pipe 201 in the center and symmetrically arranging multiple branch pipes 202 on the arc surface of the water inlet pipe 201, the coolant can quickly flow from the middle to both sides when it enters the water inlet pipe 201, which is more conducive to the rapid distribution of the coolant.

[0023] In an optional embodiment: two fixing rods 206 are fixedly connected to both sides of the water-cooled plate 1, the four fixing rods 206 are in pairs, the arc surface of the fixing rods 206 in the same group is slidably connected to a clamping plate 207, and the arc surface of the fixing rods 206 is threadedly connected to a threaded ring 208.

[0024] It should be noted that the thread drive of the threaded ring 208 facilitates the clamping of the water-cooled plate 1 onto the packaged battery pack, thus facilitating the installation of the water-cooled plate 1.

[0025] In an optional embodiment: a rectangular groove 209 is formed on the surface of the clamping plate 207, a buffer pad 212 is slidably connected to the inner wall of the rectangular groove 209, a plurality of springs 210 are fixedly connected to the inner wall of the rectangular groove 209, a rectangular plate 211 is fixedly connected to the other end of the plurality of springs 210, the buffer pad 212 is fixedly connected to the surface of the rectangular plate 211, the rectangular plate 211 is slidably connected to the inside of the rectangular groove 209, and the buffer pad 212 is a sponge pad.

[0026] It should be noted that, with the help of the elastic force of the spring 210 and the action of the buffer pad 212, the clamping plate 207 can play a buffering role when it is squeezed, so as to avoid excessive squeezing force on the battery pack and improve the protection of the battery pack to a certain extent.

[0027] The working principle of this utility model is as follows: During use, when the operator installs the water-cooled plate 1 onto the packaged battery pack, first, the threaded ring 208 is turned. Driven by the thread, the threaded ring 208 retracts a short distance, causing the two clamping plates 207 to move away from each other, allowing the battery pack to be placed between them. At this time, the spring 210 rebounds, and the buffer pad 212 extends from the rectangular slot 209. After placement, the two clamping plates 207 are moved closer together until the buffer pad 212 adheres to the battery pack. Then, the threaded ring 208 is turned, and driven by the thread, it presses against the clamping plates 207, causing the buffer pad 212 to press against the battery pack, thus causing the spring 210 to... With zero compression, the rectangular plate 211 will slide on the inner wall of the rectangular groove 209 until the buffer pad 212 is completely retracted into the rectangular groove 209, achieving the effect of installing the water-cooled plate 1. The buffer pad 212 and the spring 210 play a buffering role. Then, the inlet pipe 201 and the return pipe 205 are connected to the circulating water pump. When cooling is required, the circulating water pump is started by controlling the external controller to send the coolant into the inlet pipe 201. The coolant will then quickly enter the multiple branch pipes 202, be distributed on the entire water-cooled plate 1, flow through the side pipe 203 and the connecting pipe 204, and finally enter the return pipe 205 to achieve the circulation effect. The flow of coolant achieves the function of heat dissipation for the battery pack.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the scope of protection of this utility model patent.

Claims

1. A cooling and heat dissipation device for improving the safety performance of pouch lithium batteries, comprising a water-cooled plate (1), characterized in that, The water-cooled plate (1) is provided with an auxiliary mechanism (2). The auxiliary mechanism (2) includes a water inlet pipe (201) disposed inside the water-cooled plate (1). The arc surface of the water inlet pipe (201) is connected to multiple branch pipes (202). The water-cooled plate (1) is provided with two side pipes (203). The two side pipes (203) are connected to a connecting pipe (204). The arc surface of the connecting pipe (204) is connected to a return pipe (205). The end of the return pipe (205) away from the connecting pipe (204) passes through the water-cooled plate (1).

2. The cooling and heat dissipation device for improving the safety performance of a soft-pack lithium battery according to claim 1, characterized in that: Multiple diversion pipes (202) are evenly distributed on both sides of the inlet pipe (201). The multiple diversion pipes (202) are grouped in pairs. The diversion pipes (202) in the same group are symmetrically distributed on both sides of the inlet pipe (201). The ends of the diversion pipes (202) in the same group that are far apart from each other are respectively connected to two side pipes (203).

3. The cooling and heat dissipation device for improving the safety performance of a soft-pack lithium battery according to claim 1, characterized in that: Two fixing rods (206) are fixedly connected to both sides of the water-cooled plate (1). The four fixing rods (206) are in pairs. The arc surface of the fixing rods (206) in the same group is slidably connected to a clamping plate (207). The arc surface of the fixing rods (206) is threadedly connected to a threaded ring (208).

4. A cooling and heat dissipation device for improving the safety performance of a soft-pack lithium battery according to claim 3, characterized in that: The surface of the clamp (207) is provided with a rectangular groove (209), and a buffer pad (212) is slidably connected to the inner wall of the rectangular groove (209).

5. A cooling and heat dissipation device for improving the safety performance of a soft-pack lithium battery according to claim 4, characterized in that: The inner wall of the rectangular groove (209) is fixedly connected to a plurality of springs (210), and the other end of the plurality of springs (210) is fixedly connected to a rectangular plate (211). The buffer pad (212) is fixedly connected to the surface of the rectangular plate (211).

6. A cooling and heat dissipation device for improving the safety performance of a soft-pack lithium battery according to claim 5, characterized in that: The rectangular plate (211) is slidably connected inside the rectangular groove (209), and the buffer pad (212) is a sponge pad.

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