DE102008010808A1 - Battery with a arranged in a battery housing heat conducting plate for temperature control of the battery and method for producing a Baterie - Google Patents

Abstract

The invention relates to a battery (B) with a in a battery housing (12) arranged heat conducting plate (2) for temperature control of the battery (B), wherein a plurality of electrically parallel and / or series-interconnected single cells (1) heat conductively connected to the heat conducting plate (2 ) are connected and attached to this. In this case, at least one electronic component as an encapsulated electronic assembly (3, 4) is formed, which is fixed in the housing interior to the heat conducting plate (2). The invention further relates to a method for producing a battery (B).

Description

The The invention relates to a battery with a in a battery case arranged Wärmeleitplatte for tempering the battery according to the preamble of claim 1 and a Method for producing a battery according to The preamble of claim 13.

Usually are batteries, especially high-performance batteries for Mild hybrid drives, cooled to a resulting heat loss dissipate. Cooling becomes common, especially for reasons of space, realized by the vehicle air conditioning. In this case, a refrigerant of the vehicle air conditioner a cooling plate provided with cooling channels (also called thermal plate or evaporator plate) passed and gives a stored cold to this. A connection the cooling plate to individual cells of the battery is z. B. over heat conducting foil or potting compound.

From P810645 / DE / 1 (Off. 10 2007 063 178.4 ) is a battery with a battery case and a heat conducting plate for temperature control of the battery is known, wherein the battery has a plurality of parallel and / or serially interconnected single cells, the heat conductively connected to the heat conducting, wherein the heat conducting plate in the region of the poles of the individual wells and / or has incisions, in or through which the poles into or through. The individual cells are attached via the associated poles by means of a prestressed connection of in or on the poles positively and non-positively arranged fastening means in each case on the heat conducting plate.

There a battery case by design often not completely tight, can it by outside air pressure fluctuations and an expansion the air inside the enclosure in the event of temperature fluctuations get an air exchange with the environment. Especially on cold components The battery cooling can form condensation. This can lead to short circuits and electrochemical corrosion to lead.

Therefore, from P810645 / DE / 1 (Amt. Az. 10 2007 063 178.4 ) further known to be arranged within the housing in the space between the heat conducting plate and the individual cells and between the individual cells an electrically insulating and thermally conductive potting compound and / or an electrically insulating and thermally conductive foam. The disadvantage, however, is that a thermal expansion of the potting compound or the foam can lead to mechanical damage to the sensitive components of the battery.

Farther is a shield of all corrosion prone Mounting parts of the battery by means of potting compound or electrically insulating and thermally conductive foam only with a relatively large Effort feasible. In addition, caused by a large required amount of potting compound or foam to be used high costs. Venting channels, which a discharge a resulting gas in bursting single cells serve are difficult to portray. Such partial payments of the module a battery management system and the cell block before mounting the Battery also have the disadvantage that the electrical connections between the parts remain unprotected.

Of the Invention is therefore based on the object, an improved battery with a arranged in a battery housing heat conduction for tempering the battery and a method for producing a Specify battery, which in particular those in the prior art overcome disadvantages listed.

Regarding the battery with a arranged in a battery case Heat conducting plate for tempering the battery will be the task according to the invention by the features specified in claim 1 solved. With regard to the process for producing a Battery is the object of the invention solved specified in claim 13 features.

advantageous Embodiments of the invention are the subject of the dependent claims.

at the battery of the invention with a in one Battery housing arranged Wärmeleitplatte for Tempering the battery are several electrically parallel and / or serially interconnected single cells heat conductive connected to the heat conducting plate and attached to this. The battery is characterized according to the invention by that at least one electronic component as an encapsulated electronic assembly is formed inside the housing attached to the heat conducting plate. By the attachment that of the electronic component in the battery case is advantageously a handling of the battery and an installation of this, for example in a vehicle, is simplified.

In a further development of the invention, the encapsulated electronic assembly is arranged on the underside and / or underside on the heat conduction plate, wherein at an upper side of the heat conduction plate arranged encapsulated electronic assembly and underside of the heat conducting arranged single cells, the encapsulated electronic assembly in terms of length and / or width extent at least equal to or smaller than the heat conductivity plate is. In the case of a lower-side arrangement of the encapsulated electronic component and individual cells arranged on the underside of the heat-conducting plate, the encapsulated electronic component is at least as large or smaller than a cell assembly of the individual cells in terms of height and / or width extension. From the optional arrangement of the encapsulated electronic assembly results in a simple adaptation of an external shape of the battery to its installation location.

In Another embodiment of the battery are inside the housing the battery arranged components which at least the individual cells, the heat conducting plate and at least one encapsulated electronic Assembly comprising, with a common protective layer at least partially or substantially completely provided, which in the process of making the battery prior to final assembly the battery in particular by means of a dipping process and / or Spraying is applied. The protective layer is preferably made of an electrically insulating and / or thermally conductive Material, in particular made of a lacquer and / or silicone.

from that gives the advantage that the protective layer in very thin Layers can be applied, resulting in a low material and cost results. Furthermore, this is possible with a thermal expansion the protective layer associated risks of damage the arranged inside the housing components and thus technical failures of the battery avoided. The application the protective layer as a lacquer and / or silicone layer before final assembly The battery also causes all arranged in the battery case components against Moisture ingress protected and in a simple way and Way are electrically isolated from each other.

In In a further development of the invention, the protective layer is thermally conductive designed so that one of those in the battery case arranged components effectively generated heat loss is deductible.

Further is the battery case from a lower housing part and formed on this attached housing top, the heat conducting plate and / or the encapsulated electronic Units in the final assembly of the battery detachable in Housing interior are attached. This results in an advantageous Way a simple installation of the battery and in addition If a defect in the battery is an exchange of individual components possible, resulting in a costly replacement of the entire Battery is omitted.

Farther the battery case is provided with recesses, through which connection elements of the heat conducting plate and / or the encapsulated electronic module, in particular a high-voltage connector and / or cooling duct connections to the outside protrude. This gives you the option of putting the battery in simple way electrically and with a cooling medium cycle connect to.

embodiments The invention will be described in more detail below with reference to drawings explained.

there demonstrate:

1 3 is an exploded view of components of a battery for arrangement inside the housing;

2 schematically the components of the battery according to

1 in the assembled state from a first perspective,

3 schematically components of the battery according to 1 in the assembled state from a second perspective,

4 3 is an exploded view of a battery with components arranged inside the housing in a first view;

5 schematically an exploded view of the battery according to 4 in a second view,

6 2 is a schematic sectional view of a heat conducting plate disposed in a battery case and components of the battery attached thereto;

7 schematically a plan view of the arranged in the battery housing heat conduction according to 6 .

8th schematically a battery from a first perspective, and

9 schematically the battery according to 8th from a second perspective.

each other corresponding parts are in all figures with the same reference numerals Mistake.

1 shows an exploded view of components of a battery B for arrangement inside the housing. The components are in particular single cells 1 , a heat conduction plate 2 and at least one encapsulated electronic assembly 3 . 4 ,

There are several single cells 1 on the head side provided for cooling Wärmeleitplatte 2 arranged and form a cell network. In a non-illustrated embodiment of the invention, the heat conducting plate 2 alternatively on the bottom side of the single cells 1 or another heat conducting plate 2 additionally on the bottom side of the individual cells 1 arranged.

The single cells 1 can be used as round cells, flat cells or in other cell types, eg. B. polygonal or oval, executed. Due to the illustrated honeycomb formation of Einzellen 1 is a base of the battery B space-optimized used.

To a heat conductive connection are in 6 shown in detail pole P of each individual cell 1 in holes 2.1 that are in the heat conduction plate 2 are arranged as through holes, inserted and protrude into the heat conducting plate 2 into or through it. Based on cell connectors 6 are the single cells 1 connected in parallel and / or in series electrically depending on a desired battery voltage and power.

The cell connectors 6 are with fasteners 7 with the poles P of the single cells 1 connected, wherein the fastening means 7 for example, are designed as screws, rivets or clamp connections. The poles P of the single cells 1 preferably each have one to the fastening means 7 corresponding opening O on, so that the single cells 1 by means of the fastening means 7 and the cell connectors 6 on the heat conducting plate 2 are fixed. As an example, consider the use of screws as fasteners 7 called, in which the openings O are designed as corresponding to the screws internal thread.

The battery B may be, for example, a lithium-ion high-voltage battery. These batteries B require special electronics, which is a cell voltage of the individual cells 1 monitors and corrects and a battery management system which in particular controls a power consumption and output of the battery B (= battery control). In the illustrated embodiment of the invention are electronic components for cell voltage monitoring and / or battery control as encapsulated electronic assemblies 3 respectively. 4 educated.

These encapsulated electronic assemblies 3 . 4 can be on the top and / or bottom of the heat conduction plate 2 be arranged. In the illustrated embodiment of the invention are for a mounting of an encapsulated electronic module 3 on an upper side OS of the heat conducting plate 2 spacers 8th with holes arranged therein 8.1 intended. On the encapsulated electronic module 3 are flag-like bulges 3.1 also with holes 3.2 formed by the fastening means 9 , z. As screws, rivets or clamp connections, in the holes 8.1 the spacer elements 8th are guided.

The in the spacer elements 8th arranged holes 8.1 correspond in shape and size with the fasteners 9 so that, for example, a screw as a fastener 9 in a hole running as an internal thread 8.1 attacks. The height extension of the spacer elements 8th is greater than the height of the over the surface OS of Wärmleitplatte 2 protruding pole P, the cell connector 6 and the fastener 7 designed so that the encapsulated electronic assembly 3 with sufficient distance to the poles P of the individual cells 1 or to the cell connectors 6 at the top OS of the heat conduction plate 2 is fixed.

In the illustrated top-side arrangement of the encapsulated electronic assembly 3 on the heat conducting plate 2 and below the heat conducting plate 2 arranged single cells 1 is the encapsulated electronic assembly 3 with respect to the length and / or width extent at least equal to or smaller than the heat conduction 2 so that a compact construction of the battery B is achieved.

To a mounting of the other encapsulated electronic assembly 4 laterally below the heat conduction plate 2 is the heat conduction plate 2 formed in their longitudinal extent greater than the attached to her cell assembly, so that at a supernatant of the heat conduction 2 further drilling 2.3 for fixing the encapsulated electronic assembly 4 are arranged. At the same distance as the holes 2.3 are in the encapsulated electronic assembly 4 also holes 4.1 arranged, in turn, in their shape and size with the fasteners used 10 Correspond so that a secure attachment of the encapsulated electronic assembly 4 on the heat conducting plate 2 is possible.

The encapsulated electronic unit 4 preferably corresponds in terms of their length and width dimension to the dimensions of the cell assembly or is smaller than this, in turn, to achieve a compact design of the battery B.

Furthermore, the heat conducting plate 2 in the region of the supernatant at two corners such that a first pole P1 and a last pole P2 of the cell assembly by means of angled cell connectors 11 electrically with the encapsulated electronic module 4 are connectable.

In not shown embodiments The invention relates to the encapsulated electronic components 3 . 4 also in other arrangements on the Wärmeleitplatte 2 fixable. Here, the encapsulated electronic assemblies 3 . 4 in particular opposite each other at the end faces, the longitudinal sides and / or at the top and bottom of the cell assembly to the heat conduction 2 and / or at the individual cells 1 be attached to the cell network.

In further developments of the invention are the encapsulated electronic assemblies 3 . 4 arranged one or more connection elements, which serve to supply the cell network with electrical energy, a removal of these from the cell network and / or a control of a supply and / or removal of energy.

In the present embodiment of the invention is attached to the encapsulated electronic assembly 4 as a possible connection element a high-voltage plug 5 arranged. This is so electrically with the encapsulated electronic unit 4 interconnected that the cell assembly or the battery B controlled electrical energy can be supplied or removed.

In addition, the high-voltage plug is connected to one of them 5 opposite side of the heat conduction 2 as additional connection elements cooling duct connections 2.5 to flow through the heat conducting plate 2 arranged with a cooling medium, not shown, wherein in the heat conduction 2 not shown cooling channels for guiding the cooling medium are provided. The cooling medium may in particular be a refrigerant of a vehicle air conditioning system, the heat conduction plate 2 by means of the cooling channel connections 2.5 can be connected to a refrigerant circuit of the vehicle air conditioner and thus a heat output of the individual cells 1 and the encapsulated electronic assemblies 3 . 4 can record. Furthermore, the heat conduction plate 2 alternatively or additionally be connected to a separate cooling circuit, not shown.

2 and 3 Adjust the components of the battery B according to 1 in the assembled state from two different perspectives.

4 and 5 show exploded views of the battery B with arranged inside the housing components of the battery B in two views. The battery case 12 is preferably from an upper housing part 12.1 and a housing lower part 12.2 educated.

The assembled components are used in the method of manufacturing the battery B prior to mounting in the battery case 12 first with an in 7 shown common protective layer S at least partially or, as shown, largely completely provided. This protective layer S is in particular made of an electrically insulating and / or thermally conductive material, for example of a lacquer and / or of silicone, and is applied in an injection process and / or a dipping operation on all components which are arranged in the housing interior. In addition to all components, the protective layer S preferably also surrounds their electrical connections, so that they are effectively protected against ingress of moisture.

By the development of the invention with a thermally conductive and / or electrically insulating protective layer S becomes more effective Heat transport achieved. Additional measures for electrical insulation of the components and their electrical connections can be saved.

In a final assembly of the battery B, the heat transfer plate 2 and the components disposed therein in the battery case 12 fastened, wherein the attachment in the illustrated embodiment, in particular in the housing lower part 12.2 he follows. For this purpose, both the heat conducting plate 2 as well as the lower housing part 12.2 drilling 2.4 . 12:21 on, so by means of fasteners 13 a fixation of the heat conducting plate 2 and the components arranged thereon is made possible. At the fasteners 13 these are preferably screws, so that a detachable connection is achieved and a disassembly of the battery B is made possible in their individual components.

In an advantageous embodiment of the invention, the fastening means 7 . 9 . 10 and 13 for attachment of the individual cells 1 , the encapsulated electronic components 3 . 4 and the heat conducting plate 2 in the battery case 12 executed the same, so that a high degree of common parts use is achieved, which leads to a low cost. Furthermore, the fasteners 7 . 9 . 10 and 13 formed in an advantageous manner such that a releasable attachment is formed, so that when a defect in the battery B only defective components are replaced, whereby a costly replacement of the entire battery B is omitted.

To a lead out of the connection elements, in particular the high-voltage connector 5 and the cooling duct connections 2.5 are on the lower housing part 12.2 to these corresponding recesses 12:22 . 12:23 arranged. On an edge of the recesses 12:22 . 12:23 is in a final assembly of the battery B preferably a gasket, not shown, which z. B. is formed of a sealant or a rubber seal, applied, leaving a tight execution of the battery case 12 reached and a penetration of foreign substances into the battery case 12 and leakage of substances from the battery case 12 is avoided.

In the 6 shown sectional view of the in the battery case 12 attached heat conducting plate 2 and the components attached to it clarifies in particular the arrangement of the protective layer S applied to the components and the passage of the poles P through the holes 2.1 the heat conduction plate 2 as well as the attachment to this. In this case, the protective layer S comprises all in the battery case 12 arranged components and can be introduced by the dipping and / or injection process in all hard to reach spaces between the individual components. This results in a comprehensive isolation of the components and penetration of foreign substances into the components is effectively avoided.

at replacement of defective components, it is possible to by a new dipping and / or spraying at least partially apply a protective layer S to the renewed component, so that in a simple and cost effective manner a comprehensive protection can be produced.

7 Fig. 10 is a plan view of the battery case 12 arranged Wärmeleitplatte 2 according to 6 represents.

The 8th and 9 show the fully assembled battery B from two different perspectives. Between that during the final assembly of the battery B on the lower housing part 12.2 attached upper housing part 12.1 and the lower housing part 12.2 is preferably arranged a seal, not shown. This seal may for example be designed as an adhesive, which at the same time to a mounting of the upper housing part 12.1 on the lower housing part 12.2 serves. In a non-illustrated embodiment of the invention, the upper housing part 12.1 also by means of a detachable connection, for example a screw connection to the housing lower part 12.2 be attached, in which case preferably a reusable seal between the upper housing part 12.1 and the lower housing part 12.2 is arranged.

1

single cell

2

heat conduction

2.1 to 2.4

drilling

2.5

Cooling duct connections

3

encapsulated electronic assembly

3.1

Similar flags bulge

3.2

drilling

4

encapsulated electronic assembly

5

High-voltage connector

6

cell connectors

7

fastener

8th

spacer

8.1

drilling

9

fastener

10

fastener

11

angled cell connectors

12

battery case

12.1

Housing top

12.2

Housing bottom

12:21

drilling

12:22

First recess

12:23

Second recess

13

fastener

B

battery

OS

top

O

opening

P

pole

P1

first pole

P2

last pole

S

protective layer

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102007063178 [0003, 0005]

Claims (17)

Battery (B) with one in a battery case ( 12 ) arranged heat conducting plate ( 2 ) for tempering the battery (B), wherein a plurality of electrically parallel and / or serially interconnected single cells ( 1 ) Conducts heat with the heat conducting plate ( 2 ) and fixed thereto, characterized in that at least one electronic component as an encapsulated electronic assembly ( 3 . 4 ) is formed in the housing interior of the heat conducting plate ( 2 ) is attached. Battery (B) according to claim 1, characterized in that the encapsulated electronic assembly ( 3 . 4 ) on the upper and / or lower side of the heat conducting plate ( 2 ) is arranged. Battery (B) according to claim 2, characterized in that at a top side of the heat conducting plate ( 2 ) arranged encapsulated electronic assembly ( 3 . 4 ) and underside of the heat conducting plate ( 2 ) arranged individual cells ( 1 ) the encapsulated electronic assembly ( 3 . 4 ) with respect to the length and / or width extent at least equal to or smaller than the heat conducting plate ( 2 ). Battery (B) according to claim 2 or 3, characterized in that at a lower side of the heat conducting plate ( 2 ) arranged encapsulated electronic assembly ( 3 . 4 ) and underside of the heat conducting plate ( 2 ) arranged individual cells ( 1 ) the encapsulated electronic assembly ( 3 . 4 ) in terms of height and / or width extension at least equal to or smaller than a cell assembly of the individual cells ( 1 ). Battery (B) according to one of claims 1 to 4, characterized in that arranged inside the housing components with a common protective layer ( 2 ) are provided. Battery (B) according to claim 5, characterized in that the components arranged inside the housing at least the individual cells ( 1 ), the heat conducting plate ( 2 ) and at least one encapsulated electronic assembly ( 3 . 4 ). Battery (B) according to claim 5 or 6, characterized the protective layer (S) is formed from a lacquer and / or silicone is. Battery (B) according to one of claims 5 to 7, characterized in that the protective layer (S) thermally conductive, electrically insulating and moisture-proof is formed. Battery (B) according to one of claims 1 to 8, characterized in that the battery housing ( 12 ) from an upper housing part ( 12.1 ) and a housing lower part ( 12.2 ) is formed. Battery (B) according to one of claims 1 to 9, characterized in that the heat conducting plate ( 2 ) and / or the encapsulated electronic assemblies ( 3 . 4 ) are releasably secured inside the housing. Battery (B) according to one of claims 1 to 10, characterized in that the battery housing ( 12 ) with recesses ( 12:22 . 12:23 ), through which connection elements of the heat conducting plate ( 2 ) and / or the encapsulated electronic assembly ( 3 . 4 ) protrude outward. Battery (B) according to claim 11, characterized in that the connection elements a high-voltage connector ( 5 ) and / or cooling duct connections ( 2.5 ). Method for producing a battery (B) with one in a battery housing ( 12 ) arranged heat conducting plate ( 2 ) for tempering the battery (B), in which a plurality of electrically parallel and / or series-interconnected single cells ( 1 ) Conducts heat with the heat conducting plate ( 2 ) and fixed thereto, characterized in that prior to final assembly of the battery (B) at least one electronic component as an encapsulated electronic assembly ( 3 . 4 ) on the heat conducting plate ( 2 ) is attached. Method according to claim 13, characterized in that that before final assembly of the battery (B) inside the housing arranged components a common protective layer (S) is applied. Method according to claim 13 or 14, characterized that the protective layer (S) by means of a dipping process and / or an injection process is applied. Method according to one of claims 13 to 15, characterized in that during the final assembly of the battery (B), the heat conducting plate ( 2 ) and / or the encapsulated electronic assemblies ( 3 . 4 ) are releasably secured inside the housing. Method according to one of claims 13 to 16, characterized in that during the final assembly of the battery (B) an upper housing part ( 12.1 ) on a housing lower part ( 12.2 ) is attached.