CN211017318U

CN211017318U - Heat radiator for lithium ion battery group

Info

Publication number: CN211017318U
Application number: CN201921939517.1U
Authority: CN
Inventors: 不公告发明人
Original assignee: Xingheng Power Supply Chuzhou Co ltd
Current assignee: Xingheng Power Supply Chuzhou Co ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-07-14
Anticipated expiration: 2029-11-12

Abstract

The utility model provides a heat dissipation device of lithium ion battery pack, which plays a role of fast heat dissipation to the battery block in the battery pack without influencing the arrangement layout of the original battery pack, and comprises a top cover plate, special-shaped column pipes and a heat dissipation box, wherein a cavity is arranged in the top cover plate, the special-shaped column pipes are of a columnar structure, the overlooking section shape of the special-shaped column pipes is composed of four arc edges inwards concave inwards, the special-shaped column pipes are arranged and fixed on the lower side surface of the top cover plate in a matrix mode, the battery block is arranged between every adjacent four special-shaped pipes, the heat dissipation box is fixedly arranged at the top position of the special-shaped column pipes, the interior of the heat dissipation box is communicated with the interior of the special-shaped column pipes, the heat dissipation box is arranged in the cavity in the top cover plate, the heat dissipation box and the special-shaped column pipes are filled with heat dissipation liquid, the cavity in the top cover, the air flowing in the cavity can quickly take away heat, and the effect of quickly dissipating heat is achieved.

Description

Heat radiator for lithium ion battery group

Technical Field

The utility model relates to a lithium ion battery group technical field especially relates to a heat abstractor of lithium ion battery group.

Background

Because the lithium ion battery has high energy density, high charging and discharging efficiency, excellent performance and good cost performance, the lithium ion battery rapidly occupies the market after spontaneous development, and is widely applied to the fields of automobiles, electronic products, medical facilities and the like.

In practical application, the lithium ion battery has a large internal working current, and can generate heat, especially a battery pack formed by assembling a plurality of battery blocks, when the lithium ion battery works, heat cannot be dissipated timely due to the fact that the battery blocks are close to each other, so that the temperature of the battery pack rises, the working temperature of the battery not only affects the safety of the battery, but also seriously affects the service life, aging, energy utilization rate and other performances of the battery, the existing heat dissipation modes are basically air cooling heat dissipation and liquid cooling heat dissipation, heat dissipation channels need to be arranged between the battery blocks, the arrangement compactness between the battery blocks is affected, the electric capacity in a unit volume is reduced, and the heat dissipation mode needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide a heat dissipation device for lithium ion battery pack, which has a function of fast heat dissipation for the battery blocks in the battery pack without affecting the arrangement layout of the original battery pack, and comprises a top cover plate, a special-shaped column tube and a heat dissipation box, wherein the top cover plate is a plate-shaped body, and a cavity with the same plate shape is present in the top cover plate, i.e. the top cover plate is a box body with the plate shape, the special-shaped column tube is a columnar structure, the overlooking cross-sectional shape of the special-shaped column tube is composed of four inward-concave arc edges, the overlooking shape of the arc edge is a quarter circle, i.e. the shape is a shape that one circular edge is evenly cut into four and turned over to be adjusted to be inward-concave, two ends of the arc edge are fixedly connected with each other in sequence to form four convex edges, two straight lines formed by connecting lines between two convex edges of opposite positions are in, the arrangement space between the special-shaped column pipes is set according to the arrangement space of the battery blocks in the assembled battery pack, the battery blocks are placed between every two adjacent four special-shaped column pipes, the outer side surfaces of the periphery of the battery blocks are attached to the outer side surfaces of the arc edges, namely the special-shaped column pipes are arranged among the gaps of the battery blocks, and the special-shaped column pipes on the top cover plate are integrally inserted into the gaps among the battery blocks after the battery blocks are integrally arranged and placed.

The inside of heterotypic column pipe does not communicate with the inside of top apron, the fixed top position that sets up at heterotypic column pipe of heat dissipation box, and the inside intercommunication of the inside and heterotypic column pipe of heat dissipation box, promptly every heat dissipation box and heterotypic column pipe constitute an entirety, the inside that the heat dissipation box is in the inside cavity of top apron but the inside of heat dissipation box does not communicate with the cavity, heat dissipation box and heterotypic column pipe are the metal material preparation, heat dissipation box and the intraductal packing of heterotypic column are filled with heat dissipation liquid, can adopt the lower liquid of boiling point under the ordinary pressure, such as acetone, dichloromethane etc. about 57 ℃, or adopt water under the ordinary pressure to set up heat dissipation box and heterotypic column pipe into low pressure state, make water reach corresponding required boiling point.

The utility model discloses in, need ventilate to the cavity in the top apron, its both ends can be connected with the tuber pipe, if the group battery work takes place overheated when charging or, the intraductal radiating liquid of profile shape post can be heated and evaporated, it is rapidly with heat transfer to in the heat dissipation box, and the area of heat dissipation box is great, the heat can be taken away rapidly to the air that flows in the cavity, the effect of instant heating pipe, then the radiating liquid of steam state in the heat dissipation box can cool off again, it is intraductal to flow back to profile shape post once more by the influence of gravity.

The beneficial effects of the utility model are that, the above-mentioned process of continuous repetition then can play quick radiating effect to the battery piece in work or charging, guarantees the work or the charge efficiency of group battery, just the utility model discloses a structure does not influence the range overall arrangement of former group battery, and what mainly utilized is the clearance space between the battery piece, in addition for set up the top apron of ventilation and be in the group battery top, can possess the space that more uses were arranged.

Preferably, the specific material of the heat dissipation box and the special-shaped column tube is copper, so that the requirements of heat conductivity, cost and rigidity strength can be met.

Preferably, the heat dissipation liquid that sets up in heat dissipation box and the heterotypic column casing is water, and heat dissipation box and heterotypic column casing internal pressure set up to 10kpa to 30kpa, and the boiling point of water in heat dissipation box and heterotypic column casing like this is between 45 ℃ to 70 ℃, and the battery piece is generated heat when work or charge and is made the temperature exceed this temperature, then can lead to the water evaporation, takes away the heat rapidly, obtains rapid cooling, and water is nontoxic tasteless, easily uses.

As an improved embodiment, a slope surrounding the top of the special-shaped column tube for one circle is arranged on the inner bottom surface of the heat dissipation box, and the slope inclines downwards towards the center of the top of the special-shaped column tube, so that heat dissipation liquid liquefied in the heat dissipation box can flow back into the special-shaped column tube.

As an improved embodiment, a plurality of cooling fins are arranged on the outer wall and the inner wall of the heat dissipation box and on the inner wall of the special-shaped column tube, so that the heat transfer efficiency is increased, and the heat dissipation effect is improved.

As an improved embodiment, the films are arranged at the upper and lower positions of the outer side wall of the arc edge on the special-shaped column tube, and can be made of rubber or resin, so that the outer side position of the arc edge is prevented from directly and tightly contacting with the outer wall of the battery block, and the special-shaped column tube made of metal can be prevented from interfering the work of the battery block under the condition of not influencing heat dissipation by controlling a certain small gap, and can generate friction damage and mutual corrosion when vibrating.

Drawings

Fig. 1 is a schematic overall perspective view of the present invention.

Fig. 2 is a top sectional view (refer to section B-B) of the special-shaped column tube of the present invention.

Fig. 3 is a schematic cross-sectional view of the cross-sectional position of a-a in the present invention.

Fig. 4 is a perspective view of the battery pack of the present invention in a mounted state.

Detailed Description

The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.

A heat dissipating double-fuselage of a kind of lithium ion battery, as shown in fig. 1 and 3 sectional views, including the top cover plate 1, heterotypic pillar tube 2, heat-dissipating box 3, the said top cover plate 1 is a platelike body, there is cavity 11 of the platelike shape in its inside, namely the top cover plate 1 is equivalent to the platelike cartridge body, the said heterotypic pillar tube 2 is a column structure, its overlooking cross-sectional shape is made up of four arc edges 21 to indent, as shown in fig. 2 sectional views, the said arc edge 21 overlooking shape is a quarter circle, namely its shape is that cut into four and turned over and adjusted to the form of indent by a round edge on average, both ends of the said arc edge 21 are fixedly connected to form four convex edges 22 each other sequentially, two straight lines that line formed between two convex edges 22 of the opposite position are the vertical relation, the said heterotypic pillar tube 2 is arranged and fixed on the underside of the top cover plate 1 in a matrix way, as shown in fig. 1, the arrangement distance between the special-shaped column tubes 2 is set according to the arrangement distance of the battery blocks in the assembled battery pack, the battery blocks are placed between every four adjacent special-shaped column tubes 2, the outer side surfaces of the battery blocks are attached to the outer side surfaces of the arc edges 21, that is, the special-shaped column tubes 2 are arranged between the gaps of the battery blocks, as shown in fig. 4, after the battery blocks are arranged in an integral manner, the special-shaped column tubes 2 on the top cover plate 1 can be integrally inserted into the gaps between the battery blocks.

The inside of the special-shaped column tube 2 is not communicated with the inside of the top cover plate 1, as shown in a sectional view of fig. 3, the heat dissipation box 3 is fixedly arranged at the top of the special-shaped column tube 2, the inside of the heat dissipation box 3 is communicated with the inside of the special-shaped column tube 2, namely, each heat dissipation box 3 and the special-shaped column tube 2 form a whole, the heat dissipation box 3 is arranged in the cavity 11 inside the top cover plate 1, but the inside of the heat dissipation box 3 is not communicated with the cavity 11, the heat dissipation box 3 and the special-shaped column tube 2 are made of metal materials, the heat dissipation box 3 and the special-shaped column tube 2 are filled with heat dissipation liquid, the liquid with lower boiling point under normal pressure, such as acetone, dichloromethane and the like, or water is adopted, the boiling point under normal pressure is about 57 ℃, and the heat dissipation box 3 and the special-shaped column tube 2 are set to be in a low-.

The utility model discloses in, need ventilate to cavity 11 in the top apron 1, its both ends can be connected with the tuber pipe, if the group battery work takes place overheated when charging or, the radiating liquid in the heterotypic pillar pipe 2 can be heated and evaporated, it is rapidly with heat transfer to in the heat dissipation box 3, and the area of heat dissipation box 3 is great, the heat can be taken away rapidly to the air that flows in the cavity 11, the effect of the pipe that heats promptly, then the radiating liquid of steam attitude will condense in the heat dissipation box 3, it flows back to in the heterotypic pillar pipe 2 once more by the influence of gravity.

The beneficial effects of the utility model are that, the above-mentioned process of continuous repetition then can play quick radiating effect to the battery piece in work or charging, guarantees the work or the charge efficiency of group battery, just the utility model discloses a structure does not influence the range overall arrangement of former group battery, and what mainly utilized is the clearance space between the battery piece, in addition for set up the top apron 1 of ventilation and be located the group battery top, can possess the space that more uses were arranged.

Preferably, the specific materials of the heat dissipation box 3 and the special-shaped column tube 2 are copper, so that the requirements of heat conductivity, cost and rigidity strength can be met.

Preferably, the heat dissipation liquid that sets up in heat dissipation box 3 and the heterotypic column casing 2 is water, and pressure sets up to between 10kpa to 30kpa in heat dissipation box 3 and the heterotypic column casing 2, and the boiling point of water in heat dissipation box 3 and the heterotypic column casing 2 like this is between 45 ℃ to 70 ℃, and the battery piece is generated heat when work or charge and is made the temperature exceed this temperature, then can lead to the water evaporation, takes away the heat rapidly, obtains rapid cooling, and water is nontoxic tasteless, easily uses.

As a modified example, as shown in fig. 3, a slope 31 surrounding the top of the special-shaped pillar 2 is disposed at a bottom position in the heat dissipation box 3, and the slope 31 is inclined downward toward a center position of the top of the special-shaped pillar 2, so that the heat dissipation liquid liquefied in the heat dissipation pipe 3 can be easily returned to the special-shaped pillar 2.

As a modified embodiment, as shown in fig. 3, a plurality of cooling fins 4 are arranged on the outer wall and the inner wall of the heat dissipation box 3 and on the inner wall of the special-shaped column tube 2, so as to increase the heat transfer efficiency and improve the heat dissipation effect.

As an improved embodiment, as shown in fig. 1, the films 23 are disposed at the upper and lower positions of the outer side wall of the arc edge 21 on the special-shaped column tube 2, and may be made of rubber or resin, so as to prevent the outer side position of the arc edge 21 from directly and tightly contacting with the outer wall of the battery block, and control a certain small gap to prevent the special-shaped column tube 2 made of metal from interfering with the operation of the battery block without affecting heat dissipation, such as mutual friction damage and mutual corrosion when vibration occurs, and on the other hand, the films 23 can also have a certain anti-vibration and buffering effect.

The above description of the embodiments is only intended to help understand the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The utility model provides a heat abstractor of lithium ion battery group which characterized in that: including top apron (1), heterotypic column pipe (2), heat dissipation box (3), top apron (1) is the plate-shaped body, and its inside exists cavity (11) that is the plate shape equally, heterotypic column pipe (2) are the column structure, and it overlooks cross sectional shape and comprises four arc limits (21) to the indent, arc limit (21) overlooks the shape and is the quarter circle, the both ends of arc limit (21) fixed connection each other in proper order form four convex edge (22), and the two straight lines that the line formed between two convex edge (22) of relative position are the vertical relation, heterotypic column pipe (2) are arranged fixedly with the matrix mode and are set up on the downside of top apron (1), the inside of heterotypic column pipe (2) does not communicate with the inside of top apron (1), heat dissipation box (3) are fixed to be set up the top position at heterotypic column pipe (2), the heat dissipation box (3) is communicated with the inside of the special-shaped column tube (2), the heat dissipation box (3) is located in the cavity (11) in the top cover plate (1), but the inside of the heat dissipation box (3) is not communicated with the cavity (11), the heat dissipation box (3) and the special-shaped column tube (2) are made of metal materials, and heat dissipation liquid is filled in the heat dissipation box (3) and the special-shaped column tube (2).

2. The heat sink of lithium ion battery pack of claim 1, wherein: the specific materials of the heat dissipation box (3) and the special-shaped column tube (2) are copper.

3. The heat sink of lithium ion battery pack of claim 1, wherein: the heat dissipation liquid arranged in the heat dissipation box (3) and the special-shaped column tube (2) is water, and the internal pressure of the heat dissipation box (3) and the special-shaped column tube (2) is set to be between 10kpa and 30 kpa.

4. The heat sink of lithium ion battery pack of claim 1, wherein: the bottom surface position is provided with slope (31) around heterotypic pillar pipe (2) top a week in heat dissipation box (3), slope (31) are towards heterotypic pillar pipe (2) top central point department downward sloping.

5. The heat sink of lithium ion battery pack of claim 1, wherein: the heat dissipation box is characterized in that a plurality of cooling fins (4) are arranged on the outer wall and the inner wall of the heat dissipation box (3) and the inner wall of the special-shaped column tube (2).

6. The heat sink for lithium ion batteries according to any of claims 1 to 5, wherein: and rubber sheets (23) are arranged at the upper side and the lower side of the outer side wall of the arc edge (21) on the special-shaped column tube (2).