CN212967813U

CN212967813U - Electric vehicle battery end plate of carbon fiber

Info

Publication number: CN212967813U
Application number: CN202021608925.1U
Authority: CN
Inventors: 周柳华; 周岳勇
Original assignee: Huizhou Xinyeda Hardware Co ltd
Current assignee: Huizhou Xinyeda Hardware Co ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-04-13
Anticipated expiration: 2030-08-05

Abstract

A carbon fiber electric vehicle battery end plate comprises an end plate main body, a first radiating fin, a second radiating fin and an electrode plate; one end face of the end plate main body is provided with a cell placing groove, a heat dissipation cavity is formed in the end plate main body, the cell placing groove and the heat dissipation cavity are isolated through an electrode plate, a heat conduction silica gel layer and a phase change material layer are arranged in the heat dissipation cavity, a first heat dissipation sheet is arranged between the heat conduction silica gel layer and the photo material layer, and the heat conduction silica gel layer and the phase change material layer are respectively abutted to the first heat dissipation sheet; the end plate main part has seted up the heat dissipation through-hole back to the terminal surface of electric core standing groove, and the one end of second fin is connected with the phase change material layer, and the heat dissipation through-hole is worn to establish by the other end of second fin. Utilize heat conduction silica gel layer to have good heat conductivility and insulating properties, utilize the phase change material layer to have the exothermic characteristics of approximate constant temperature energy storage, and combine the quick heat conduction's of first fin and second fin characteristics for electric motor car battery end plate can give off the heat of battery fast.

Description

Electric vehicle battery end plate of carbon fiber

Technical Field

The utility model relates to an electric motor car battery heat dissipation technical field especially relates to an electric motor car battery end plate of carbon fiber.

Background

The battery is used as a key component in the electric automobile, the performance of the battery directly influences the running condition of the electric automobile, and the temperature is an important factor influencing the performance of the power battery. When the vehicle runs under different driving conditions of high speed, low speed, acceleration, deceleration and the like which are alternately changed, the battery can discharge at different rates to generate a large amount of heat, and in addition, the space of the battery pack is limited during the design of the whole vehicle, so that the heat dissipation in the use process is slow, and the temperature of the battery is extremely high. An excessively high temperature may cause a reduction in the capacity, life and energy efficiency of the battery, and if heat is not dissipated in time at a high temperature, thermal runaway may occur, and severe expansion and explosion may occur in serious cases.

At present, the thermal management problem of the power battery is widely concerned by a plurality of battery manufacturers and experts, and an air cooling heat dissipation ventilation mode is generally adopted in the market, but the cooling speed is slow, the uniformity of temperature distribution among battery cells is poor, and the safe operation of the power battery is very unfavorable.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to design an end plate of an electric vehicle battery, which can assist in heat dissipation of a power battery.

A carbon fiber electric vehicle battery end plate comprises an end plate main body, a first radiating fin, a second radiating fin and an electrode plate;

an electric core placing groove is arranged on one end face of the end plate main body, a heat dissipation cavity is formed in the end plate main body, the electric core placing groove is isolated from the heat dissipation cavity through the electrode plate, a heat conduction silica gel layer and a phase change material layer are arranged in the heat dissipation cavity, the heat conduction silica gel layer is arranged on one face, back to the electric core placing groove, of the electrode plate, the phase change material layer is arranged on one face, back to the electrode plate, of the heat conduction silica gel layer, the number of the first heat dissipation fins is multiple, the first heat dissipation fins are evenly arranged at intervals, the first heat dissipation fins are arranged between the heat conduction silica gel layer and the photo material layer, the heat conduction silica gel layer and the phase change material layer are respectively abutted against the first heat dissipation fins, heat dissipation bulges are arranged on two opposite sides of the first heat dissipation fins, and, the heat dissipation bulge is inserted in the heat dissipation hole;

the end plate main part back to the terminal surface of electricity core standing groove has seted up the heat dissipation through-hole, the one end of second fin with the phase change material layer is connected, the other end of second fin wears to establish the heat dissipation through-hole, the second fin is fixed in the end plate main part.

In one embodiment, the second heat sink is at least partially disposed protruding from the end plate body.

In one embodiment, the part of the second cooling fin protruding out of the end plate main body is arranged in a wave shape.

In one embodiment, the number of the cell placement grooves and the number of the electrode plates are multiple, each cell placement groove corresponds to one of the motor plates, and the electrode plates are electrically connected with each other.

In one embodiment, the number of the heat dissipation holes and the heat dissipation protrusions is multiple, the heat dissipation through holes are evenly spaced, and the heat dissipation protrusions are arranged corresponding to the heat dissipation holes.

In one embodiment, the photo frame further comprises a graphite heat dissipation film, and the graphite heat dissipation film is used for wrapping the photo material layer.

The utility model has the advantages that: the battery core is placed in the battery core placing groove, the electrode plate transmits heat of the battery core to the heat-conducting silica gel layer, the heat-conducting silica gel layer transmits the heat to the first radiating fin, the first radiating fin transmits the heat to the phase-change material layer, the phase-change material layer transmits the heat to the second radiating fin, and the second radiating fin guides the heat out of the end plate main body, so that the heat dissipation of the battery core is realized; utilize heat conduction silica gel layer has good heat conductivility and insulating properties, avoids electric core to take place the electric leakage phenomenon when fully conducting heat, utilizes phase change material layer has the exothermic characteristics of approximate constant temperature energy storage, and combines first fin reaches the quick heat conduction's of second fin characteristics makes electric motor car battery end plate can give off the heat of battery fast, makes the battery keep better working property, has improved the life of battery.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is the structural schematic diagram of the electric vehicle battery end plate made of carbon fiber of the present invention.

Reference numerals:

10. an end plate of the battery of the electric vehicle; 100. an end plate main body; 200. a first heat sink; 300. a second heat sink; 400. an electrode sheet; 110. a battery cell placing groove; 120. a heat dissipation cavity; 500. a heat conductive silica gel layer; 600. a phase change material layer; 210. a heat dissipation protrusion; 510. heat dissipation holes; 130. and the heat dissipation through hole.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, an end plate 10 of a carbon fiber electric vehicle battery includes an end plate main body 100, a first heat sink 200, a second heat sink 300, and an electrode sheet 400;

a cell placing groove 110 is formed in one end face of the end plate main body 100, a heat dissipation cavity 120 is formed in the end plate main body 100, the cell placing groove 110 and the heat dissipation cavity 120 are isolated by the electrode plate 400, a heat conduction silica gel layer 500 and a phase change material layer 600 are arranged in the heat dissipation cavity 120, the heat conduction silica gel layer 500 is arranged on one face, back to the cell placing groove 110, of the electrode plate 400, the phase change material layer 600 is arranged on one face, back to the electrode plate 400, of the heat conduction silica gel layer 500, a plurality of first heat dissipation plates 200 are arranged, the first heat dissipation plates 200 are evenly arranged at intervals, the first heat dissipation plates 200 are arranged between the heat conduction silica gel layer 500 and the photo material layer, the heat conduction silica gel layer 500 and the phase change material layer 600 are respectively abutted to the first heat dissipation plates 200, and heat dissipation protrusions 210 are arranged on two opposite sides of the, the heat-conducting silica gel layer 500 and the photo material layer are provided with heat dissipation holes 510, and the heat dissipation protrusions 210 are inserted into the heat dissipation holes 510;

a heat dissipation through hole 130 is opened in an end face of the end plate main body 100 facing away from the battery cell placement groove 110, one end of the second heat sink 300 is connected to the phase change material layer 600, the other end of the second heat sink 300 penetrates through the heat dissipation through hole 130, and the second heat sink 300 is fixed to the end plate main body 100.

Specifically, a battery cell is placed in the battery cell placement groove 110, an anode or a cathode of the battery cell abuts against the electrode plate 400, the electrode plate 400 is used for electrically connecting the battery cell, meanwhile, the electrode plate 400 is used for conducting heat of the battery cell, the electrolyte sheet transfers the heat of the battery cell to the heat-conducting silicone layer 500, because the heat-conducting silicone layer 500 has good heat-conducting property and insulating property, the heat-conducting silicone layer 500 transfers the heat of the electrode plate 400 to the first heat sink 200 while ensuring insulation and no leakage of electricity, the first heat sink 200 serves as a heat transfer bridge between the heat-conducting silicone layer 500 and the phase-change material layer 600, the first heat sink 200 transfers the heat of the heat-conducting silicone layer 500 to the phase-change material layer 600, and by utilizing the characteristic of high-temperature energy storage and low-temperature energy release of the phase-change material, a large temperature difference can be formed between the heat-conducting silicone, so that the heat transfer efficiency between the heat conductive silicone layer 500 and the phase change material layer 600 is high, and the second heat sink 300 transfers the heat of the phase change material layer 600 to the outside of the heat dissipation cavity 120.

In an embodiment, the phase change material layer 600 includes phase change powder, and the phase change powder is made of one of alkane wax, polyethylene wax, polypropylene wax, or paraffin wax.

Further, by adding a curing agent and resin into the phase-change powder, the heat storage performance of the phase-change powder can be improved, and specifically, the resin, the curing agent and the phase-change powder are mixed and banburied, wherein the weight percentage of the resin is 10-30%, the weight percentage of the phase-change powder is 30-85%, and the weight percentage of the curing agent is 10-30%.

In the embodiment, the heat conductivity coefficient of the phase change powder is 1-7W/m.k, or the phase change temperature of the phase change powder is 25-90 ℃.

Specifically, the phase-change powder has the capacity of absorbing and discharging heat and storing heat, the phase-change temperature of the phase-change powder is 25-90 ℃, the phase-change temperature of the phase-change powder can meet the heat dissipation requirement of most heating components during working, and the phase-change powder absorbs or releases heat conducted by the first heat dissipation fins 200 through physical form conversion.

In this embodiment, the phase-change material layer 600 further includes a heat-conducting powder, the heat-conducting powder and the phase-change powder are mixed with each other, the heat-conducting powder includes one or more of aluminum oxide, boron nitride, silicon micropowder, aluminum nitride or magnesium oxide, and the heat-conducting coefficient of the heat-conducting powder is 1-200W/m.k.

Specifically, the heat conductive powder has a good heat conductive property, so that on one hand, the heat of the first heat sink 200 can be quickly conducted, and on the other hand, the heat conductive powder and the phase change material powder are uniformly mixed, so that the heat storage or heat release time of the phase change material powder can be shortened.

It should be noted that, in one embodiment, the second heat dissipation fins 300 are at least partially protruded from the outer side of the end plate body 100. The second fin 300 passes heat dissipation through-hole 130 extends to outside the heat dissipation chamber 120, the second fin 300 will phase change material layer 600's heat transfer arrives in the outside air of heat dissipation chamber 120, because the temperature of air can be less than or equal to heat conduction silica gel layer 500's temperature, consequently, phase change material layer 600 can absorb the storage heat conduction silica gel layer 500's heat to release the heat in the air that the temperature is lower relatively, thereby, phase change material heat absorption energy storage reduces heat conduction silica gel layer 500's temperature, exothermic release can be given the heat transfer in the outside air of heat dissipation chamber 120, and can not the reverse heating heat conduction silica gel layer 500.

In this embodiment, the portions of the second heat dissipation fins 300 protruding from the end plate body 100 are arranged in a wave shape.

Specifically, the wavy second fin 300 has a large contact surface area with air, so that the heat dissipation capability of the second fin 300 can be improved, and in order to further improve the heat dissipation capability of the second fin 300, a heat dissipation adhesive is applied to the second fin 300.

In order to dissipate heat more rapidly, in one embodiment, the second heat sink 300 is further connected to heat dissipation fins (not shown) having a larger contact surface area with air, so that heat dissipation efficiency is higher.

In one embodiment, the number of the cell placement slots 110 and the number of the electrode plates 400 are multiple, each cell placement slot 110 corresponds to one of the motor plates, and the electrode plates 400 are electrically connected with each other.

Specifically, the power battery pack generally refers to packaging, packaging and assembly, such as: 2 batteries are connected in series to form a certain shape according to the requirement of a client, and we call it pack. In Pack industry, a battery which is not assembled into a battery cell and can be directly used is often called a battery cell, and a finished battery which is connected with a PCM (pulse-code modulation) board and has the functions of charge and discharge control and the like is often called a battery. The plurality of battery cells in each of the cell placement grooves 110 are connected in series by the electrode tabs 400 to constitute a battery module having a larger voltage and current.

In one embodiment, the number of the heat dissipation holes 510 and the heat dissipation protrusions 210 is multiple, the heat dissipation through holes 130 are uniformly spaced, and the heat dissipation protrusions 210 are disposed corresponding to the heat dissipation holes 510.

Specifically, the heat dissipation protrusions 210 are abutted against the hole walls of the heat dissipation holes 510, and the heat dissipation protrusions 210 are inserted into the heat dissipation holes 510, so that the first heat sink 200, the heat conductive silicone layer 500 and the phase change material layer 600 have higher heat exchange efficiency.

In one embodiment, the photo material layer further comprises a graphite heat dissipation film for wrapping the photo material layer. Specifically, the heat conductive film using graphite as a base material has good chemical stability, plasticity and thermal conductivity, and can not chemically react with the phase change material powder, and can be easily molded into a desired shape when wrapping the phase change material powder, thereby well transferring the heat of the first heat sink 200 to the second heat sink 300.

In one embodiment, the carbon fiber electric vehicle battery end plate comprises an end plate main body, a heat dissipation bracket, a third heat dissipation sheet and an electrode plate; a cell containing groove is formed in one end face of the heat dissipation main body, a heat dissipation cavity is formed in the end plate main body, the cell containing groove is isolated from the heat dissipation cavity through the electrode plate, the heat dissipation support is arranged in the heat dissipation cavity and is abutted to the electrode plate, a plurality of first containing holes are formed in one end face, close to the electrode plate, of the heat dissipation support, a plurality of second containing holes are formed in one end face, away from the electrode plate, of the heat dissipation support, the first containing holes and the second containing holes are respectively and uniformly arranged at intervals, heat conduction silica gel is filled in the first containing holes, and phase change heat conduction materials are filled in the second containing holes; the end plate main part back to the terminal surface of electricity core standing groove has seted up the heat dissipation through-hole, the one end of third fin with the heat dissipation support is connected, the other end of third fin passes the heat dissipation through-hole, just the third fin at least part protrusion with outside the end plate main part.

In this embodiment, the heat dissipation bracket is a heat conductive ceramic bracket, and the heat dissipation bracket has good heat conductivity and insulation performance, so as to avoid electric leakage while conducting heat; the electrode plate is contacted with the battery cell, the heat of the battery cell is conducted, and the heat of the electrode plate is transferred out by the heat dissipation support; the heat conducting silica gel is arranged in the first accommodating hole, the first accommodating hole is arranged on one end face, close to the electrode plate, of the heat radiating support, the heat conducting silica gel in the first accommodating hole is abutted to the electrode plate, the heat conducting silica gel can accelerate the heat conducting efficiency of the heat radiating support to the electrode plate, the phase change heat conducting material in the second accommodating hole can accelerate the absorption and storage of heat of the heat radiating support, the heat of the heat conducting silica gel is transmitted into the phase change heat conducting material through the heat radiating support, namely, the heat of an electric core sequentially passes through the electrode plate, the heat conducting silica gel and the heat radiating support to the phase change heat conducting material, the third heat radiating fin is communicated with air outside the heat radiating cavity, and the heat radiating support can transmit partial heat to the air outside the heat radiating cavity through the heat radiating support, and the heat stored in the phase change heat conduction material can be conducted to the outside of the heat dissipation cavity through the heat dissipation bracket and the third heat dissipation fin. In order to increase the heat dissipation efficiency, the end plate main body is further provided with a ventilation cavity, the ventilation cavity is arranged on one side of the heat dissipation cavity, the ventilation cavity is communicated with the heat dissipation cavity, the ventilation cavity is provided with a ventilation opening, and the ventilation opening is provided with a ventilation fan. In order to ensure that the phase change heat conduction material is not blown away by the ventilator, the phase change heat conduction material can be wrapped by a graphite heat dissipation film.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above embodiments are only intended to illustrate some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A carbon fiber electric vehicle battery end plate is characterized by comprising an end plate main body, a first radiating fin, a second radiating fin and an electrode plate;

an electric core placing groove is formed in one end face of the end plate main body, a heat dissipation cavity is formed in the end plate main body, the electric core placing groove is isolated from the heat dissipation cavity through the electrode plate, a heat conduction silica gel layer and a phase change material layer are arranged in the heat dissipation cavity, the heat conduction silica gel layer is arranged on one face, back to the electric core placing groove, of the electrode plate, the phase change material layer is arranged on one face, back to the electrode plate, of the heat conduction silica gel layer, the first heat dissipation fin is arranged between the heat conduction silica gel layer and the phase change material layer, the heat conduction silica gel layer and the phase change material layer are respectively abutted to the first heat dissipation fin, heat dissipation protrusions are arranged on two opposite sides of the first heat dissipation fin, heat dissipation holes are formed in the heat conduction silica gel layer;

2. The carbon fiber electric vehicle battery end plate of claim 1, wherein the second heat sink is at least partially disposed protruding from the end plate body.

3. The carbon fiber end plate for electric vehicle batteries according to claim 2, wherein the portion of said second heat dissipating fin protruding from said end plate body is waved.

4. The carbon fiber electric vehicle battery end plate of claim 1, wherein the number of the cell placement grooves and the number of the electrode plates are multiple, each cell placement groove corresponds to one electrode plate, and the electrode plates are electrically connected with each other.

5. The carbon fiber end plate for the battery of the electric vehicle as claimed in claim 1, wherein the number of the heat dissipation holes and the heat dissipation protrusions is plural, the heat dissipation through holes are evenly spaced, and the heat dissipation protrusions are disposed corresponding to the heat dissipation holes.

6. The carbon fiber end plate for the battery of the electric vehicle as claimed in claim 1, further comprising a graphite heat dissipation film for wrapping the phase change material layer.