WO2011060819A1

WO2011060819A1 - Battery module

Info

Publication number: WO2011060819A1
Application number: PCT/EP2009/065470
Authority: WO
Inventors: Gerhard Holzwarth; Boris Gendlin
Original assignee: Robert Bosch Gmbh
Priority date: 2009-11-19
Filing date: 2009-11-19
Publication date: 2011-05-26

Abstract

The invention relates to a battery module (1), comprising a housing (2), at least one battery (3) disposed in the housing (2), said battery having a degassing valve (25), at least one first degassing channel (14) for receiving substances released by the battery (3), and at least one second degassing channel (15) for receiving substances released by the battery (3), wherein the at least one first degassing channel (14) and the at least one second degassing channel (15) are connected in a fluid-conducting manner to one another by at least one connecting channel.

Description

description

title

Battery module The invention relates to a battery module according to the preamble of claim 1 and a battery module system.

State of the art

Batteries, z. As lithium ion batteries or zebra batteries, supply various facilities, such. As motor vehicles, hospitals or drills, with electricity. Generally, multiple batteries are installed in a housing, thereby forming a battery module. Battery modules have the advantage that they are more easily tempered with a cooling fluid and higher electrical power can be easily realized by the combination of several battery modules to form a battery module system. The cooling fluid is introduced into the battery module through an inlet opening and out of the battery module through an outlet opening. In the case of malfunctions or during normal operation, the batteries generate gases or

Vapors, which can lead to an overpressure in the gas-tight housing of the battery. In order to prevent bursting or uncontrolled leaks on the battery, the gases are discharged into the environment of the battery in the battery module by means of a degassing or overpressure valve. Normally, one end of the battery is on

Degassing valve formed. It may exceptionally be present at two ends of the battery depending on a degassing valve.

The arranged in a housing batteries are tempered with circulating air as the cooling fluid, d. H. cooled and / or heated. So that the substances leaving the degassing valve do not enter the cooling or tempering fluid, they are

Battery modules provided with degassing channels. In this case, an upper end of the battery is surrounded by a first degassing and a second lower end of the battery in the battery module surrounded by a second degassing, in which the Degassing valve which can discharge substances at an overpressure. In battery modules two degassing channels are required, because in batteries with only one degassing valve in the battery module in two, 180 ° pivoted positions for a

different polarity can be arranged. The two degassing channels guide the substances controlled from the battery module by one material discharge each. This is to prevent that emerging from the batteries uncontrolled, z. B. in the cooling fluid can get. Disadvantageously, two batteries are thus connected to the battery module

Material derivations required. From the substance discharges substances are derived, for example, in a motor vehicle to the effect that there is no danger to the occupants of the motor vehicle.

Disclosure of the Invention Advantages of the Invention

A battery module according to the invention comprises a housing, at least one battery arranged in the housing with a degassing valve, at least one first degassing channel for receiving substances emerging from the battery, preferably at a first end of the at least one battery or the housing, at least one second degassing channel for receiving of substances emerging from the battery, preferably at a second end of the at least one battery or the housing, wherein the at least one first degassing channel and the at least one second

Degassing channel fluidly connected to at least one connecting channel with each other. Thus, only one substance discharge to the battery module is necessary, can be derived together with the exiting substances from the two degassing channels.

In a further embodiment, the at least one connecting channel is formed on a side wall of the housing. The side wall can thus also be used as Verbindungsungskanalwandung.

In a variant, the at least one connecting channel is formed parallel to a longitudinal axis of the at least one battery. The connecting channel can thus be installed to save space in a space between two batteries.

Suitably, the at least one connecting channel is formed in a gap between at least two batteries. In an additional embodiment, at least one electrical line is arranged in the at least one connecting channel. The connecting channel can thus also be used as a cable channel for at least one electrical line for charging and discharging the at least one battery.

Preferably, the at least one first degassing channel is formed as a plate-shaped degassing between a top wall and an outer top wall. The top wall and the outer top wall can thus be used to form the first degassing channel.

In an additional embodiment, the at least one second degassing duct is formed as a plate-shaped degassing duct between a bottom wall and an outer bottom wall. The bottom wall and the outer bottom wall can thus be used to form the second degassing channel.

In particular, the battery module only has an outer material discharge. This simplifies the discharge of the substance because only one substance discharge is required.

In a further embodiment, the housing and / or the at least one

Connecting channel made of plastic. The housing can thus be easily and inexpensively manufactured by injection molding.

In particular, the at least one connecting channel is a component of the housing and / or the housing is in two parts. The connecting channel can thus be easily manufactured during injection molding of at least part of the housing.

In a supplementary embodiment, the battery module has at least one

Inlet opening for introducing a cooling fluid into the housing and at least one outlet opening for discharging the cooling fluid from the housing.

Preferably, the battery module comprises at least 5 batteries, in particular 6 or 8 batteries.

In one variant, the at least one battery is at least one lithium-ion battery and / or the cooling fluid is air.

A battery module system according to the invention with a plurality of battery modules comprises at least one battery module described above. BRIEF DESCRIPTION OF THE DRAWINGS An embodiment of the invention will be described in detail below with reference to the accompanying drawings. It shows:

1 is a schematic cross section of a battery module according to section A-A in FIG

2,

Fig. 2 is a schematic longitudinal section of the battery module according to section B-B in

Fig. 1 and

Fig. 3 is a highly schematic longitudinal section of a battery module system.

Embodiments of the invention

FIG. 1 shows a battery module 1 according to the invention for accommodating six

Lithium ion batteries 4 formed batteries 3 shown in a schematic cross section. The housing 2 formed from walls 10 has four

Side walls 13, a bottom wall 11 and a top wall 12 (Fig. 1). The size of the battery module 1 depends on the size of the batteries 3 and, for example, length of the battery module 1 is 12 cm, the width 7 cm and the height 10 cm. Through an inlet opening 5 of an inlet line 7 on the top wall 12, air is passed as a tempering fluid for cooling and / or heating into an interior space 24 of the housing 2. The housing 2 is made of metal or plastic.

The air is by means of a blower or a fan (not shown) in the

Inlet opening 5 of the inlet conduit 7 and introduced into a gap 9 and flows through an outlet 8 and an outlet 6 again out of the housing 2 out.

The housing 2 comprises an upper housing part 18, a lower housing part 19, an outer cover wall 22 and an outer bottom wall 23

Lithium ion batteries 4 are interconnected by means of electrical lines 21 (shown only in FIG. 2). The upper and lower housing parts 18, 19 with approximately the same heights are placed on each other during assembly and with each other,

For example, by means of a screw connection (not shown) connected. Before the Joining the upper and lower housing parts 18, 19, the six batteries 3, each with a degassing valve 25 to the effect in the upper or lower housing part 18, 19 introduced, that the degassing valve 25 is alternately up or down. Thus, the polarities of the arranged in the upper housing part 18 ends of the batteries 3 are different. The top and bottom walls 11, 12 of the upper and lower

Housing part 18, 19 is each provided with six circular recesses into which protrude the upper and lower ends of the lithium-ion batteries 4. At the circular recesses, a sealing ring (not shown) is arranged. On the top wall 12 of the upper housing part 18, the outer upper cover wall 22 and on the bottom wall 11 of the lower housing part 19, the outer lower bottom wall 23 is placed. This forms between the top wall 12 of the upper housing part 18 and between the bottom wall 11 of the lower housing part 19 and the lower bottom wall 23, a first and second degassing channel 14, 15 for the lithium ion batteries 4, so that of the lithium ion batteries 4 through the

Degassing valves 25 escaping gas can not enter the air for tempering (Fig. 1).

The inlet duct 7 on the upper cover wall 12 slightly above the upper

Cover wall 12 extended (Fig. 4) and abuts in a bore of the outer

Top wall 22. Analogously, this is also the case with the outer bottom wall 23 and the bottom wall 11 with the outlet line 8 (FIG. 1). The degassing channels 14,

15 are fluid-tight to a traversed by tempering fluid interior 24 of the

Battery module 1 sealed. As a result, the air for tempering does not come into contact with substances present in the degassing channels 14, 15.

The first degassing passage 14 and the second degassing passage 15 are provided with two

Connecting channels 16 fluidly connected to each other (Fig. 2). The vertical

Connecting channels 16 are not shown due to the sectional view in Fig. 1. By formed on a bore 20 on the outer top wall 22 substance discharge 17 can be derived from the first degassing 14 of all degassing 25 exiting substances controlled by the battery module 1, so that, for example, to the occupants of a motor vehicle no health damage due to the exiting toxic Substances can occur. If substances from a arranged in the second degassing 15 degassing valves 25 in the second

Entgasungskanal 15 pass, these substances through the two connecting channels

16 flow into the first degassing 14. From the first degassing 14th These substances can then be derived controlled by the substance 17 derivation. Advantageously, therefore, only one substance discharge 17 is required on the battery module 1.

The two connection channels 16 are formed integrally with the upper housing part 18 and the lower housing part 19. In this case, part of the side wall 13 is used for the formation of a connecting channel wall 26. The other part of the

Connecting channel wall 26 protrudes into a gap 9 between two batteries 3, so that existing interior 24 can be used for the formation of the connecting channel 16. In the connecting channel 16 electrical lines 21 for charging and discharging the batteries 3 are arranged. Advantageously, so that the

Connecting channel 16 can also be used as a cable channel. To adapt the

geometric arrangement of the batteries 3, the connecting channel 16 is aligned parallel to the batteries 3. Several battery modules 1 can also be connected to a battery module system 27 according to the invention (FIG. 3). In a battery module system 27, for example, for a passenger vehicle or commercial vehicle, with 9 battery modules 1 each with 6th

Lithium ion batteries 4 are thus 54 lithium ion batteries 4. For degassing of the battery modules 1 are thus advantageously only a small number of

Material derivatives 17 needed because each battery module 1 only one substance discharge 17 is necessary. The modular design allows better scalability, because with the identical battery modules 1 different electrical power for different applications can be easily realized. Overall, with the battery module 1 according to the invention considerable

Improvements possible. Despite the formation of two separate degassing channels 14, 15 in the battery module 1, only one material discharge for out of the batteries 3

Exiting substances necessary, so that the discharge of exiting the degassing valves 25 substances is greatly simplified and improved.

Claims

claims

1. battery module (1), comprising a housing (2), at least one in the housing (2) arranged battery (3) with a degassing valve (25), at least a first degassing channel (14) for receiving from the battery (3) Exiting substances, at least one second degassing channel (15) for receiving from the battery (3) exiting substances, characterized in that the at least one first degassing duct (14) and the at least one second degassing duct (15) fluidly with at least one connecting channel (16 ) are interconnected.

2. Battery module according to claim 1, characterized in that the at least one connecting channel (16) on a side wall (13) of the housing (2) is formed.

3. Battery module according to claim 1 or 2, characterized in that the at least one connecting channel (16) is formed parallel to a longitudinal axis of the at least one battery (3).

4. Battery module according to one or more of the preceding claims, characterized in that the at least one connecting channel (16) in an intermediate space (9) between at least two batteries (3) is formed.

5. Battery module according to one or more of the preceding claims, characterized in that in the at least one connecting channel (16) at least one electrical line (21) is arranged.

6. Battery module according to one or more of the preceding claims, characterized in that the at least one first degassing duct (14) as a plate-shaped

Degassing channel (14) between a top wall (12) and an outer cover wall (22) is formed.

7. Battery module according to one or more of the preceding claims, characterized in that the at least one second degassing duct (15) as a plate-shaped

Degassing channel (15) between a bottom wall (11) and an outer bottom wall (23) is formed.

8. Battery module according to one or more of the preceding claims, characterized in that the battery module (1) has only one outer material discharge (17).

9. Battery module according to one or more of the preceding claims, characterized in that the housing (2) and / or the at least one connecting channel (16)

Plastic exist.

10. Battery module according to one or more of the preceding claims, characterized in that the at least one connecting channel (16) is a component of the housing (2) and / or the housing (2) is in two parts.

11. Battery module according to one or more of the preceding claims, characterized in that the battery module (1) at least one inlet opening (5) for introducing a cooling fluid into the housing (2) and at least one outlet opening (6) for discharging the cooling fluid from the housing (2).

12. Battery module according to one or more of the preceding claims, characterized in that the battery module (1) comprises at least 5 batteries (3), in particular 6 or 8 batteries (3).

13. Battery module according to one or more of the preceding claims, characterized in that the at least one battery (3) is at least one lithium-ion battery (4) and / or the cooling fluid is air.

14. Battery module system (27) with a plurality of battery modules (1), characterized in that the battery module system (27) comprises at least one battery module (1) according to one or more of the preceding claims.