CN211404567U

CN211404567U - Battery box heat abstractor

Info

Publication number: CN211404567U
Application number: CN201922314378.XU
Authority: CN
Inventors: 张志坚
Original assignee: Beijing Songshengyuan Environment Technology Co ltd
Current assignee: Beijing Songshengyuan Environment Technology Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-09-01
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a battery box heat abstractor, this battery box include box and battery module, and the battery module links together with the casing part of box with heat-conducting piece, and the box distributes away generating heat of battery module as the radiator. The battery box heat dissipation device is simple in structure, low in manufacturing cost and reliable in performance.

Description

Battery box heat abstractor

Technical Field

The utility model relates to a battery heat dissipation especially relates to a battery box heat abstractor.

Background

With the gradual deepening of energy conservation and emission reduction, the proportion of new energy in energy supply is increased year by year, the electric energy storage effectively solves the power grid fluctuation caused by the instability of the new energy, and meanwhile, the electric automobile is more and more widely popularized, and wide development space is provided for the application of the energy storage battery.

The development of energy storage applications places more stringent requirements on battery performance. The operating temperature of the battery is an important factor influencing the performance and the service life of the battery. In a medium-large energy storage system, a cold-hot type air conditioner is usually provided, but the temperature of a battery cell is increased to an alarm upper limit due to the fact that the battery cell in a battery box cannot perform effective heat exchange with air outside the battery box, so that charging and discharging current is limited, and even charging and discharging are stopped.

The industry adopts fan forced air cooling's mode to come to the battery box cooling mostly, but during this mode, often because of the too fast compulsory reduction charge-discharge rate of battery temperature rise, thereby the battery can catch fire the risk of explosion because of thermal runaway otherwise. There are also patented technologies for cooling the battery by liquid cooling and air cooling, but although these methods are effective, the cooling device increases the volume of the battery box and the manufacturing cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery box heat abstractor, simple structure, low in cost, the dependable performance.

In order to achieve the above object, the utility model provides a battery box heat abstractor, this battery box include box and battery module, and the battery module links together with the casing part of box with heat-conducting piece, and the box distributes away generating heat of battery module as the radiator.

Optionally or preferably, a turbulent fan is mounted on the side wall of the box body.

Alternatively or preferably, the battery module has a nickel plate, one end of the heat-conducting member is crimped on the nickel plate, and the other end of the heat-conducting member is crimped on the housing of the case.

Optionally or preferably, the box body comprises a frame and a heat conducting plate wrapped on the frame.

Alternatively or preferably, the heat conducting plate is riveted on the frame through bolts and nuts in an insulating manner.

Optionally or preferably, the heat conducting plates on the left side, the right side, the upper side and the rear side of the box body are all provided with vent holes.

The embodiment of the utility model provides a beneficial effect that technical scheme brought is: according to the preset temperature range, the refrigeration and the heating are automatically carried out, and the interval temperature control is realized, so that the battery always works in the safe temperature range. The battery energy storage system is applied to the battery energy storage system used in the areas with inconvenient transportation, no commercial power, severe environment and great change of temperature difference in four seasons. The air conditioner has the advantages of reliable performance, small volume, no vibration and no noise, and can replace an air conditioner inconvenient for transportation to realize refrigeration and heating. Can adapt to a wide temperature range, and can continuously adjust the room temperature to +/-20 ℃ and control the temperature to +/-0.5 ℃. The heating efficiency is more than 100 percent, and the refrigerating efficiency is 60 to 70 percent. The thermal inertia is small, and the maximum temperature difference can be achieved within one minute after electrification.

Drawings

Fig. 1 is a schematic structural diagram of a battery box heat dissipation device according to an embodiment of the present invention.

Fig. 2 is a schematic view of a partial structure of a box body in a heat dissipation device of a battery box according to an embodiment of the present invention.

Fig. 3 is another schematic structural diagram of a portion of a case body in a heat dissipation device of a battery box according to an embodiment of the present invention.

Fig. 4 is a schematic view of a battery module in a heat dissipation device of a battery box according to an embodiment of the present invention.

Fig. 5 is a schematic riveting diagram of a box body in a heat dissipation device of a battery box according to an embodiment of the present invention.

1-a box body; 2-a battery module; 3-a heat conducting member; 11-cold rolled steel sheet; 12-superconducting heat seal alloy material; 13-a fan; 21-nickel plate; 22-electric core; 41-bolt; 42-insulating particles; 43-a thermally conductive insulating sheet; 44-nut.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in further detail with reference to specific examples, but the present invention is not limited thereto.

As shown in fig. 1 and 4, an embodiment of the present invention provides a heat dissipation apparatus for a battery box, which uses a super heat conductive alloy material as a heat conductive medium (heat conducting member) to conduct heat from a battery cell to a box casing. The thermal conductivity of pure silver is 412W/m.k, while that of the superconducting heat alloy material is 14000000W/m.k, which is different by 3.4 ten thousand times.

This superconductive heat seal gold material's one end crimping is on the nickel piece of battery module, and other end crimping is on the box shell, installs the vortex fan simultaneously on the box, so way, can be fast to the heat conduction of electric core on the box shell, regard the box shell as the radiator for the temperature is close to the same between electric core that the fan can not blow and the adjacent electric core.

In this scheme, a plurality of electric cores 22 connect in parallel and two upper and lower nickel pieces 21 welding together constitute a battery module 2, and after a plurality of battery modules 2 connect in series-parallel, the dress is in a box 1, constitutes a battery box (also called battery package, battery PACK).

In a preferred embodiment, the main load-bearing frame of the box 1 is a cold-rolled steel plate 11, the heat dissipation part of the box shell is a heat conduction plate made of a superconducting alloy material 12, the cold-rolled steel plate 11 and the superconducting alloy material 12 are riveted together by bolts 41 and nuts 44, and the heat conduction plate and the superconducting alloy material are electrically insulated by insulating particles 42 and heat conduction insulating sheets 43.

The two ends of the heat conducting piece 3 are respectively connected with the nickel sheet 21 on the module and the heat conducting insulating material 12 of the box body shell in a pressing mode, the pressing surface of the heat conducting piece 3 and the super heat conducting alloy material 12 is not subjected to insulation treatment, and the heat conducting insulating sheet 43 is used for electrical insulation.

The fan 13 is arranged on the panel of the box body, and the superconducting heat insulating material 12 on the left side, the right side, the upper side and the rear side of the box body is provided with ventilation holes.

In the present invention, the contact surface between the heat conducting member 3 and the cold rolled steel sheet 11 and the nickel sheet 21 is as large as possible, and the non-contact surface between the heat conducting member 3 and the superconducting heat seal alloy material 12 is in a groove-loop shape to enhance the heat dissipation effect.

It should be noted that:

1. two nickel sheets 21 of each battery module 2 are connected with the casing heat-conducting alloy material 12 through the heat-conducting alloy material 3, so that the temperature difference among a plurality of battery cores is reduced. When the module is installed, the superconducting materials connected with different modules cannot be short-circuited.

2. The contact surface between the super heat conductive alloy 3 and the nickel plate 21 is preferably as large as possible.

3. The heat-conducting insulating sheet 43 is made of a heat-conducting silicone sheet, and both surfaces of the sheet are coated with heat-conducting silicone grease to enhance the heat-conducting effect.

4. The superconducting heat seal alloy material 12 on the shell is provided with a vent hole. The air duct is not specially arranged in the battery box.

5. Even if the fan on the battery box breaks down, the battery core can not be out of control thermally.

6. The thickness of the heat-conducting insulation sheet is determined according to the total direct-current voltage after the plurality of battery boxes are connected in series, and the minimum breakdown voltage of the heat-conducting insulation sheet is 4 kV/mm.

7. The surfaces of all materials need to be blunted at an acute angle and deburred.

In conclusion, the heat dissipation device of the embodiment realizes that the battery core and the box body are rapidly heat-exchanged in an alloy conduction mode, so that the battery energy storage system can continuously and stably work with larger charge-discharge multiplying power. In addition to the aforementioned liquid cooling/air cooling techniques, there is no alternative solution with good effect. Effectively solves the problem of large temperature difference between the battery core and the outside of the battery box caused by unsmooth airflow when the battery cores are closely arranged

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The battery box heat dissipation device comprises a box body and a battery module, and is characterized in that the battery module is connected with a shell part of the box body through a heat conduction piece, and the box body is used as a heat radiator to dissipate heat generated by the battery module.

2. The battery box heat sink as recited in claim 1, wherein a turbulent fan is mounted on a side wall of the box body.

3. The heat sink as claimed in claim 1, wherein the battery module has a nickel plate, one end of the heat conducting member is press-fitted on the nickel plate, and the other end of the heat conducting member is press-fitted on the case of the case.

4. The battery box heat sink of claim 1, wherein the box includes a frame and a thermally conductive plate wrapped around the frame.

5. The battery box heat sink according to claim 4, wherein the heat conducting plate is riveted to the frame through bolts and nuts.

6. The battery box heat dissipation device of claim 5, wherein the heat conduction plates on the left side, the right side, the upper side and the rear side of the box body are all provided with ventilation holes.