CN206116553U - Battery management system heat abstractor - Google Patents

Abstract

The utility model discloses a battery management system heat abstractor relates to the electronic equipment field, and this battery management system heat abstractor includes PCBA board, heat -conducting silica gel cushion and casing, heat -conducting silica gel cushion's one side with the contact of PCBA board, heat -conducting silica gel cushion's another side with body case contact, the PCBA board is the radiating area with the part of heat -conducting silica gel cushion contact, the casing includes main casing and boss. Because the PCBA board is high -pressure part, and the casing is the low pressure part, needs sufficient safe distance between the high -low pressure part and could guarantee to have good insulating nature between the high -low pressure part, and in order to pursue better insulating effect, common way is the safe distance who increases between the high -low pressure part, and the indirectness leads to heat -conducting silica gel cushion's increase in thickness, has increaseed cost, in this embodiment, and owing to the boss exceeds the main casing, the PCBA board with the clearance of casing is littleer, and required heat -conducting silica gel cushion's thickness is also more little, the cost is reduced, and heat transmission effect strengthens simultaneously.

Description

A kind of battery management system heat abstractor

Technical field

This utility model is related to electronic device field, more particularly to a kind of battery management system heat abstractor.

Background technology

Battery management system is the core of electric automobile, vitals, its voltage to set of cells, temperature, electric current, SOC The overall control of the parameters such as (charged state), SOH (health status), to the whole battery bag life-span there is provided important guarantor Card.

As set of cells is made up of some single battery cores, therefore battery management system also acts a balancing energy Effect.Battery management system can be prevented with the monitoring of the important information in Real-time Collection, process, storage battery module running Only battery overcharges or over-discharge, extends the life-span of battery.

The equalization scheme of battery management system, is technically divided into two kinds of active equalization and passive equilibrium.Active equalization be by The slightly higher energy of monomer energy is transferred on the slightly lower monomer of energy by energy storage link, realizes the proportionality action of actively distribution, Caloric value is little；And passive equilibrium is then to consume the slightly many individualities of cell capacity, overall proportionality action, caloric value are realized Than larger.It is for structure compared complexity, the active equalization of high cost, passive balanced because which relatively early, technology maturation occurs simply, mesh It is front to use the most extensive on the market.Therefore, good heat sink conception is become for the key of passive balancing battery management system It is located.

During this utility model is realized, inventor has found that at least there are the following problems in prior art：Existing electricity Management system passive equilibrium heat sink conception in pond has many defects：

1) radiated using cast aluminum casings, raw material is expensive, complex process, the high cost of battery management system；

Aluminum is a kind of metal material that thermal conductivity ratio is higher, price is also more expensive, with aluminum hull come good heat dissipation effect, but due to An aluminum inherently germplasm soft metal, if the housing direct punch forming of aluminium sheet, intensity can not reach requirement.Therefore can only adopt Use aluminum process.Cast aluminium is the aluminum with molten condition, is cast in mould, after cooling formed required form with more high-strength A kind of process of the aluminum component of degree.But from the point of view of current Industry situation, it is to be difficult to the one of management and control during cast aluminium that operation is melted in refining Procedure, quality is melted in the refining of aluminum, and problem is relatively more always, and the also bad grasp of its solidification law, therefore its technique degree is complicated, The cost of aluminum component is also high.

2) the heat conductive silica gel mat thickness selected is universal partially thick, and thermal resistance is big, causes battery management system radiating bad；

Thermal conductive silicon rubber cushion is belong to heat-conducting interface material (Thermal Interface Materials, TIM) wherein one Kind, it is mainly used in the space filled up between two kinds of parts, reduces heat transfer resistance, improves heat dispersion.Thermal resistance represents object to heat The obstruction effect of amount conduction, concept are similar with resistance.According to the Fourier's law of heat conductivity：Thermal resistance and material thickness are into just Than.As its name suggests, if material thickness is bigger, heat-transfer path is longer, and the resistance which is received is bigger, i.e., thermal resistance is bigger, radiating Effect is just bad.Therefore preferably thermal conductive silicon rubber cushion is gone back in addition to it should possess high-termal conductivity (heat conductivity is high), high-flexibility Need to possess another feature is exactly：Thickness is little.

3) heat conductive silica gel pad product is universal bigger than normal, and unit price is high, causes the high cost of battery management system；

Thermal conductive silicon rubber cushion is the adjuvant such as addition metal-oxide, by one kind of special process synthesis with silica gel as base material Heat-conducting medium material.Its function is to complete heating position (PCBA board with passive balance module) and radiating position (housing) Between heat transfer.In the case of area of dissipation identical, the gap between PCBA board and housing is bigger, required heat conductive silica gel The thickness of pad is bigger, and the volume of thermal conductive silicon rubber cushion is also bigger, and the bigger heat conductive silica gel single pad valency of volume is higher.

4) thermal conductive silicon rubber cushion is only contacted with smooth shell inner surface, without positioning, is easily shifted, is caused to contact with components and parts Bad, radiating effect is poor.

Because the limited space inside battery bag, sometimes battery management system is limited under the pressure of space needs endways dress.Car During traveling, operating mode is more complicated, during battery management system is endways dress, if thermal conductive silicon rubber cushion only with smooth housing in Surface contacts, and is lined with and may shift along with complicated operating mode heat conductive silica gel, is easy for causing to contact not with components and parts It is good, so as to cause radiating effect to be deteriorated, affect the function of battery management system.

Utility model content

In order to overcome the shortcomings of Related product in prior art, the utility model proposes a kind of battery management system radiating dress Put, the shortcomings of solve existing battery management system weak heat-dissipating and high cost.

This utility model solves the technical scheme adopted by its technical problem：

A kind of battery management system heat abstractor provided by the utility model, including：PCBA board, thermal conductive silicon rubber cushion and shell Body；The one side of the thermal conductive silicon rubber cushion is contacted with the PCBA board, and the another side of the thermal conductive silicon rubber cushion is contacted with the housing, The part that the PCBA board is contacted with thermal conductive silicon rubber cushion is radiating area.

Used as further improvement of the utility model, the housing includes that main casing and boss, the main casing and boss are punchings The entirety that pressure is completed, the boss apex zone also include the projection of protrusion.

As further improvement of the utility model, the boss and described and thermal conductive silicon rubber cushion contact surface zone line It is heat transfer layer that independent punching press is completed, the projection is the projection stamped out on heat transfer layer, the heat transfer layer is logical with the boss The mode crossed riveting or weld is fixedly connected.

Used as further improvement of the utility model, the projection is the projection of integral type punching press on boss, or independent punching The individuality that pressure is completed, is fixed on the boss by way of riveting or welding.

Used as further improvement of the utility model, the projection is located in the boss and thermal conductive silicon rubber cushion contact surface Between region or both sides.

As further improvement of the utility model, when the projection is located at the boss with thermal conductive silicon rubber cushion contact surface During both sides, the projection is to be arranged in parallel mutually independently, or the continuous projection of a row constitutes tongue.

Used as further improvement of the utility model, the main casing and boss are the independent individuals that punching press respectively is completed, institute State main casing to be fixedly connected by way of riveting or welding with boss.

Used as further improvement of the utility model, the housing includes main casing and aluminium sheet, and the aluminium sheet passes through countersunk head spiral shell Nail is fixed on the main casing, and the sunk screw through the aluminium sheet and projects the aluminium sheet one by hammering on the outside of main casing Point.

Used as further improvement of the utility model, the main casing is the continuous entirety that punching press is completed, or with aluminium sheet Gap at face is fixedly connected, the length of the breach fills the breach by the aluminium sheet less than the length of the aluminium sheet Part, the both sides that the aluminium sheet is connected with the main casing are fixed by sunk screw.

Compared with prior art, this utility model has the advantage that：

As the boss is higher by the main casing, less with the gap of the housing, the required thermal conductive silicon of the PCBA board The thickness of rubber cushion is also less, the volume of the silicagel pad of identical contact area is reduced due to reducing silica gel mat thickness, silicagel pad Consumption reduce, reduce cost, and as the thermal conductive silicon rubber cushion is compressed, the thickness of the thermal conductive silicon rubber cushion further subtract Little, the thermal resistance of the thermal conductive silicon rubber cushion is reduced, and heat-transfer effect is strengthened.

Description of the drawings

For the technical scheme being illustrated more clearly that in this utility model embodiment, below will be to making needed for embodiment Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present utility model, For those of ordinary skill in the art, on the premise of not paying creative work, can be with according to these accompanying drawings acquisitions Other accompanying drawings.

Fig. 1 is the first embodiment structural representation of battery management system heat abstractor described in the utility model；

Fig. 2 is another structural representation of first embodiment of battery management system heat abstractor described in the utility model；

Fig. 3 is the second embodiment structural representation of battery management system heat abstractor described in the utility model；

Fig. 4 is the 3rd embodiment structural representation of battery management system heat abstractor described in the utility model；

Fig. 5 is the fourth embodiment structural representation of battery management system heat abstractor described in the utility model；

Fig. 6 is the 5th example structure schematic diagram of battery management system heat abstractor described in the utility model；

Fig. 7 is another structural representation of the 5th embodiment of battery management system heat abstractor described in the utility model.

Specific embodiment

For the ease of understanding this utility model, this utility model is more fully retouched below with reference to relevant drawings State.Preferred embodiment of the present utility model is given in accompanying drawing.But, this utility model can come real in many different forms It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to public affairs of the present utility model The understanding for opening content is more thorough comprehensive.

Unless otherwise defined, all of technology used herein and scientific terminology are led with technology of the present utility model is belonged to The implication that the technical staff in domain is generally understood that is identical.In term used in the description of the present utility model it is simply herein The purpose of description specific embodiment, it is not intended that in limiting this utility model.

Embodiment one

Refering to the first embodiment for shown in Fig. 1, being battery management system heat abstractor described in the utility model, the battery Management system heat abstractor include PCBA (Printed Circuit Board+AssemblyPCB, hollow plate through SMT upper parts, then Through the whole processing procedure of DIP plug-in units) plate 1, thermal conductive silicon rubber cushion 2 and housing 3.

In this utility model embodiment, the thermal conductive silicon rubber cushion 2 is arranged on the lower section of the PCBA board 1, in other realities Apply in mode, when the battery management system heat abstractor is vertically placed, the thermal conductive silicon rubber cushion 2 is located at the PCBA board 1 Side；The one side of the thermal conductive silicon rubber cushion 2 is contacted with the PCBA board 1, another side and the housing of the thermal conductive silicon rubber cushion 2 3 contacts, the part that the PCBA board 1 is contacted with thermal conductive silicon rubber cushion 2 are radiating area；Thermal conductive silicon rubber cushion 2 described in the present embodiment is The flexible silicon rubber cushion of thickness T, the quantity of the T voluntarily can be arranged as the case may be.

The housing 3 includes that main casing 31 and boss 32, the main casing 31 and boss 32 are the entirety that punching press is completed, described convex 32 apex zone of platform also includes the projection 321 of punching press protrusion, and the quantity of the projection 321 is arranged according to the actual requirements, generally 2-6, but it is not limited to 2-6；32 surface of the boss is not dusted or is painted, and reduces thermal resistance.

Clearance height between the bottom surface of the top surface of the boss 32 and the PCBA board 1 be h, the top surface of the main casing 31 And the clearance height between the bottom surface of the PCBA board 1 is H, i.e., the boss 32 is higher by the main casing 31 distance of H-h, institute The quantity for stating H, h voluntarily can be arranged as the case may be.

The thermal conductive silicon rubber cushion 2 is clipped between the boss 32 and the PCBA board 1, and the PCBA board 1 compresses described leading Hot silicagel pad 2, make the boss 32 top surface and the PCBA board 1 bottom surface between clearance height be h, i.e., described thermal conductive silicon Rubber cushion 2 is by the height of compression T-h.

As the PCBA board 1 is high voltage component, and the housing 3 is low pressure components, is needed between high-low pressure part Enough safe distances (H of diagram) have between high-low pressure part good insulating properties just can guarantee that, in order to pursue preferably absolutely Edge effect, it is common practice to increase the safe distance H between high-low pressure part, indirectly causes the thermal conductive silicon rubber cushion 2 Thickness increases, and increases cost burden, this utility model embodiment due to the boss 32 be higher by the main casing 31 have H-h away from From the PCBA board 1 is less with the gap of the housing 3, and the thickness of required thermal conductive silicon rubber cushion 2 is also less, due to reducing silicon Rubber cushion thickness causes the volume of the silicagel pad of identical contact area to reduce, and the consumption of silicagel pad is reduced, and reduces cost, and due to The thermal conductive silicon rubber cushion 2 is further reduced by the height of compression T-h, the thickness of the thermal conductive silicon rubber cushion 2, the thermal conductive silicon rubber cushion 2 thermal resistance is reduced, and heat-transfer effect is strengthened.

The main casing 31 is made of panel beating, and the panel beating is usually to make which produce plasticity by mould punching metallic plate to become Shape, so as to form desired shape and size, and further can form some institutes by welding or a small amount of machining The slightly complicated feature for needing, compares casting technique, and the main casing 31 is made by panel beating, and technique and mould are all simpler, and batch After amount, the price of single housing 3 also compares that cast member is cheap very more, and cost reducing effect is clearly.

As PCBA board 1 compresses the thermal conductive silicon rubber cushion 2, coordinate the projection 321 on the boss 32 lead to described Hot silicagel pad 2 plays fixed effect, and preventing the thermal conductive silicon rubber cushion 2 from shifting in use causes to connect with the PCBA board 1 Touch bad, radiating effect is deteriorated.When the projection 321 is located at the zone line of the boss 32 and 2 contact surface of thermal conductive silicon rubber cushion When to the thermal conductive silicon rubber cushion 2 play a part of strengthen friction, the thermal conductive silicon rubber cushion 2 is fixed；When the projection 321 When both sides of the boss 32 with 2 contact surface of thermal conductive silicon rubber cushion, can be the multiple projections 321 independent mutually that be arranged in parallel, Can also be the tongue of the continuous composition of projection 321 of a row, as shown in Fig. 2 the thermal conductive silicon rubber cushion 2 of the projection 321 pairs The effect of stop, is fixed to the thermal conductive silicon rubber cushion 2.

Embodiment two

On the basis of above-described embodiment, refering to shown in Fig. 3, being battery management system heat abstractor described in the utility model Second embodiment.

The main casing 31 and boss 32 are the independent individuals that punching press respectively is completed, and the main casing 31 and boss 32 are described One joint face 33 is fixedly connected by way of riveting or welding.

The material of the boss 32 can be the metallic plate with some strength as 31 material of the main casing, another In one way of example, it would however also be possible to employ the higher aluminium pressure of thermal conductivity is formed, when the boss 32 adopts aluminium material, can To further enhance heat conduction and heat radiation effect, while main casing 31 also has some strength, all adopt compared to main casing 31 and boss 32 The housing 3 of the metallic plate material with some strength, with more preferable heat conduction and heat radiation effect, compared to main casing 31 and boss 32 all Using the housing 3 of aluminium material, with more preferable intensity effect, cost is lower simultaneously.

Embodiment three

On the basis of above-described embodiment, refering to shown in Fig. 4, being battery management system heat abstractor described in the utility model 3rd embodiment.

The main casing 31 and boss 32 are the entirety that punching press is completed, and the boss 32 is contacted with thermal conductive silicon rubber cushion 2 with described The zone line in face is the heat transfer layer 322 that independent punching press is completed, and the projection 321 is the projection stamped out on heat transfer layer 322.

The boss 32 is fixedly connected in the second joint face 34 by way of riveting or welding with the heat transfer layer 322.

The heat transfer layer 322 can be the metallic plate with some strength as 32 material of main casing 31 and boss. In another way of example, the aluminium that the heat transfer layer 322 can also adopt thermal conductivity higher is stamped to form, compared to main casing 31 Be metallic plate material boss 32 be aluminium material main casing 31, while heat conduction and heat radiation effect does not decline, further reduce The ratio of aluminium, reduces cost.

Example IV

On the basis of above-described embodiment, refering to shown in Fig. 5, being battery management system heat abstractor described in the utility model Fourth embodiment.

The projection 321 can be the projection of integral type punching press on boss 32, and material is as the boss 32；At other In embodiment, the projection 321 can also be the individuality that independent punching press is completed, and by way of riveting or welding be fixed on institute State on boss 32, the material of the projection 321 can be metallic plate material or aluminium.

As the projection 321 is that independent punching press is completed, the punching press difficulty of main casing 31 can be further reduced, improve workpiece Working (machining) efficiency.

Embodiment five

On the basis of above-described embodiment, refering to shown in Fig. 6 and Fig. 7, be battery management system described in the utility model dissipate 5th embodiment of thermal.

The boss 32 can be replaced by the aluminium sheet 4 that height is H-h, and the aluminium sheet 4 is fixed on institute by sunk screw 41 State on main casing 31, the sunk screw 41 by hammering on the outside of main casing 31, through the aluminium sheet 4 and the protrusion aluminium sheet 4 is a part of, Play a part of above-mentioned projection 321, for fixing the thermal conductive silicon rubber cushion 2.

The main casing 31 that is fixedly connected with aluminium sheet 4 is the continuous entirety that punching press is completed, in another embodiment, can be with Gap at face is fixedly connected with aluminium sheet 4 in main casing 31, the length of the breach is less than the length of the aluminium sheet 4, the main casing 31 height is t, fills the part of the breach by the aluminium sheet 4, and the both sides that the aluminium sheet 4 is connected with the main casing 31 pass through Sunk screw 41 is fixed.

Above-described embodiment is this utility model preferably embodiment, but embodiment of the present utility model is not by above-mentioned The restriction of embodiment, it is other it is any without departing from the change made under spirit of the present utility model and principle, modify, replace Generation, combination, simplification, should be equivalent substitute mode, are included within protection domain of the present utility model.

Claims (9)

1. a kind of battery management system heat abstractor, it is characterised in that include：PCBA board, thermal conductive silicon rubber cushion and housing；It is described to lead The one side of hot silicagel pad is contacted with the PCBA board, and the another side of the thermal conductive silicon rubber cushion is contacted with the housing, the PCBA The part that plate is contacted with thermal conductive silicon rubber cushion is radiating area.

2. battery management system heat abstractor according to claim 1, it is characterised in that：The housing includes main casing and convex Platform, the main casing and boss are the entirety that punching press is completed, and the boss apex zone is also including the projection for protruding.

3. battery management system heat abstractor according to claim 2, it is characterised in that：The boss and described and heat conduction The zone line of silicagel pad contact surface is the heat transfer layer that independent punching press is completed, and the projection is the projection stamped out on heat transfer layer, The heat transfer layer is fixedly connected by way of riveting or welding with the boss.

4. battery management system heat abstractor according to claim 2, it is characterised in that：The projection is one on boss The projection of formula punching press, or the individuality that independent punching press is completed, are fixed on the boss by way of riveting or welding.

5. battery management system heat abstractor according to claim 2, it is characterised in that：The projection is located at the boss With zone line or the both sides of thermal conductive silicon rubber cushion contact surface.

6. battery management system heat abstractor according to claim 5, it is characterised in that：When the projection is positioned at described convex During the both sides of platform and thermal conductive silicon rubber cushion contact surface, the projection is to be arranged in parallel mutually independently, or the continuous group of bumps of a row Into tongue.

7. battery management system heat abstractor according to claim 2, it is characterised in that：The main casing and boss are difference The independent individual that punching press is completed, the main casing and boss are fixedly connected by way of riveting or welding.

8. battery management system heat abstractor according to claim 1, it is characterised in that：The housing includes main casing and aluminum Plate, the aluminium sheet are fixed on the main casing by sunk screw, the sunk screw by hammering on the outside of main casing, through the aluminum Plate the protrusion aluminium sheet part.

9. battery management system heat abstractor according to claim 8, it is characterised in that：The main casing is that punching press is completed It is continuous overall, or gap at face is being fixedly connected with aluminium sheet, the length of the breach is less than the length of the aluminium sheet, by institute The part that aluminium sheet fills the breach is stated, the both sides that the aluminium sheet is connected with the main casing are fixed by sunk screw.