AU2021370773A1 - Battery module with a low stray field - Google Patents

Battery module with a low stray field Download PDF

Info

Publication number
AU2021370773A1
AU2021370773A1 AU2021370773A AU2021370773A AU2021370773A1 AU 2021370773 A1 AU2021370773 A1 AU 2021370773A1 AU 2021370773 A AU2021370773 A AU 2021370773A AU 2021370773 A AU2021370773 A AU 2021370773A AU 2021370773 A1 AU2021370773 A1 AU 2021370773A1
Authority
AU
Australia
Prior art keywords
submodule
rechargeable batteries
battery module
current flow
electrical contacts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
AU2021370773A
Inventor
Marc Pein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp AG
ThyssenKrupp Marine Systems GmbH
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Marine Systems GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp AG, ThyssenKrupp Marine Systems GmbH filed Critical ThyssenKrupp AG
Publication of AU2021370773A1 publication Critical patent/AU2021370773A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/183—Sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
    • B63G8/08—Propulsion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The present invention relates to a battery module (100), wherein the battery module (100) has a first sub-module (110) and a second sub-module (120), wherein the first sub-module (110) has a plurality of accumulators (10), wherein all the electrical contacts of the first sub-module (110) are located on the side of the first sub-module (110) opposite the second sub-module (120), wherein all electrical contacts of the second sub-module (120) are located on the side of the second sub-module (120) opposite the first sub-module (110), wherein the horizontally adjacent accumulators (10) are electrically connected in parallel and wherein the vertically adjacent accumulators (10) are electrically connected in series.

Description

BATTERY MODULE WITH LOW FIELD LEAKAGE
The invention relates to a battery module in particular for lithium-based rechargeable batteries.
Lithium-based rechargeable batteries are of increasing interest, for example owing to the high energy density. Specifically for large energy stores, however, there are two basic differences from, for example, lead-sulfuric acid rechargeable batteries. Firstly, the individual cells cannot be easily enlarged as desired. This results in generally a multiplicity of rechargeable batteries being assembled to form a larger module. Secondly, specifically in the case of these rechargeable batteries, there is the problem of thermal runaway. Since, in this case, a large quantity of gas is also produced in relation to the volume of the rechargeable battery, and, in the case of relatively large cells, also an absolutely correspondingly large quantity, this poses a high risk, in particular in critical environments, such as has been demonstrated, for example, in rechargeable batteries in aircraft.
Generally, rechargeable batteries have two electrodes, an anode and a cathode. In the simplest case, an electrolyte is arranged therebetween. The electrolyte can be liquid or else solid. In addition, there are often layers on the electrode, in particular in lithium ?0 rechargeable batteries intercalation layers. Electrical contact is generally made with each electrode by an externally accessible contact.
For travel underwater, submarines traditionally have batteries with a large capacity which thus represent a vital energy supply. It is also necessary to always ensure in the event of ?5 an emergency that energy is provided in order to keep the crew alive and to surface. Therefore, specifically in the submarine sector, it is important that all of the important component parts are designed to be shock-proof, i.e. survive a shock wave triggered by a detonation in the immediate vicinity and thereafter remain functional. In this case, extremely high forces occur for a short period of time.
At the same time, the safety specifically of lithium cells in a submarine is much more important than, for example, in a passenger car. While in a passenger car people can leave the car practically immediately and safely, this is not possible in the case of a submerged submarine. A complicating factor is in addition that a submerged submarine also only makes available a very small breathable atmosphere, i.e. pollutants therefore cannot be emitted and diluted quickly.
US 2012/0003508 Al discloses a battery having lithium cells having a flame-retardant foam filler between the lithium cells.
DE 10 2017 214 289 Al discloses a battery module having at least two battery cells and in each case at least one safety valve.
DE 10 2015 219 280 Al discloses a battery system encapsulated using a casting compound and having a plurality of battery cells.
DE 10 2008 013 188 Al discloses an electrochemical rechargeable battery having a degassing chamber for accommodating a gas emerging from the cells in the event of an incident.
JP 02 174 077 A discloses a solid-state secondary battery.
DE 10 2016 001 287 Al discloses a rechargeable battery block having a plurality of ?0 rechargeable battery cells and a casting compound, wherein the rechargeable battery cells are surrounded by a polyimide layer.
PCT/EP2020/000182 discloses a shock-proof battery module in particular for lithium rechargeable batteries.
DE 10 2009 000 675 Al discloses a rechargeable battery.
EP 2 639 858 Al discloses a battery system.
DE 10 2013 203 204 Al discloses a battery having a first and a second battery module.
The object of the invention is to provide a battery module which has as little magnetic irradiation as possible during operation and has particularly good long-term stability.
This object is achieved by the battery module having the features specified in claim 1. Advantageous developments can be gleaned from the dependent claims, the description below and the drawings.
The battery module according to the invention has a first submodule and a second submodule. One submodule preferably consists of a submodule housing and rechargeable batteries arranged in the submodule housing. The rechargeable batteries are preferably encapsulated in the submodule housing so that they are held securely and reliably by the casting compound. Preferably, the submodules are in the form of a rectangular parallelepiped. Other geometries for the submodules are naturally also conceivable, in particular geometries which adapt optimally to the curves in a submarine in order to be able to make optimal use of the space in the interior of the pressure hull. In this case, it is necessary to weigh up between a standardized favorable manufacture of the modules and a more complex but thus capacity-enlarging improved space utilization. The first submodule has a plurality of rechargeable batteries, and the second submodule has a plurality of rechargeable batteries, wherein the number of rechargeable batteries of the first submodule is particularly preferably identical to the number of rechargeable batteries of the second submodule. Each rechargeable battery has a first electrical contact and a second electrical contact. The first electrical contact and the second ?0 electrical contact are each arranged on the same end side of the rechargeable battery. The end side of the first submodule with the electrical contacts is arranged in a first plane, the end side of the second submodule with the electrical contacts is arranged in a second plane. The first plane is planar-parallel with respect to the second plane. Furthermore, all of the first electrical contacts are connected to a first, inner electrode of the rechargeable ?5 batteries, and all of the second electrical contacts are connected to a second electrode of the rechargeable batteries. For example, each first electrical contact is in each case connected to the cathode of the respective rechargeable battery, and each second electrical contact is in each case connected to the anode of the respective rechargeable battery. Preferably, at each rechargeable battery, the first electrical contact is in each case at the same potential as the second electrical contact (for once not taking into account minimal type-dependent fluctuations owing to minimal differences in the rechargeable batteries). Alternatively, the connections can also be the other way around. Thus, all of the first electrical contacts have a first polarity, and all of the second electrical contacts have the opposite, second polarity. Thus, all of the first contacts correspond to the positive terminal, and all of the second contacts correspond to the negative terminal, or vice versa. All of the electrical contacts of the first submodule are arranged on that side of the first submodule which is opposite the second submodule, and all of the electrical contacts of the second submodule are arranged on that side of the second submodule which is opposite the first submodule. The submodules are therefore oriented in such a way that the sides with the contacts of the rechargeable batteries point towards one another. In this case, however, there is a physical spacing between the contacts, with the result that they do not touch one another. As a result, the space between electrical connections and between the currents flowing during operation is minimized in order thus to minimize the magnetic flux generated by the conductor loop and therefore keep the signature as small as possible.
According to the invention, the first and second electrical contacts of the first submodule are connected to one another in such a way that a current flow results which, on average, flows in the first plane or parallel to the first plane. Quite similarly, the first and second electrical contacts of the second submodule are connected to one another in such a way that a current flow results which, on average, flows in the second plane or planar-parallel with respect to the second plane. The current flow of the first submodule and of the second submodule are in the opposite direction to one another. This therefore results in ?0 the electrical current flowing, for example, from top to bottom in one submodule and from bottom to top in the other submodule. The flowing currents of the submodules are therefore in the opposite direction, which, together with the spacing which is as small as possible, results in maximum compensation of the resultant electrical fields.
?5 Current flow within the meaning of the invention is the averaged rms total current flow via a submodule. In this case, it is also possible for partial currents which are not flowing parallel to the average current flow to occur. For example, the partial currents can arise by virtue of the fact that different rechargeable batteries have different internal resistances. The current flow is therefore to be understood as being an rms current flow via an entire submodule.
The first plane in which the end side of the first submodule is and the second plane in which the end side of the second submodule with the electrical contacts is arranged should be understood in the technical sense and also comprises a tolerance range in which the contacts can be arranged underneath and above this plane. The extent of the tolerance range is in this case, for example, at most the length of the contacts perpendicular to the plane. This can also be provided, for example, by virtue of the fact that one of the terminal contacts is designed to be longer and the other is designed to be shorter, which does occur in the case of certain types of rechargeable batteries. This can also serve, for example, to prevent a rechargeable battery from being inserted incorrectly, as a result of which damage would occur.
The electrical contacts can be connected by electrical conductors, i.e., for example, conductor bars, metal strips, cables or the like. Likewise, connections can take place via functional elements, for example fuses. For this purpose, for example, in one embodiment, all of the first electrical contacts can be connected to a first conductor bar, and all of the second electrical contacts can be connected to a second conductor bar. All of the rechargeable batteries are therefore, in this embodiment, connected in parallel, with the result that the battery module can provide a maximally high current, but at a voltage which is as low as possible, the voltage of the individual rechargeable battery. The first conductor bar and the second conductor bar are in this case oriented in their longitudinal extent (predominantly) in the direction of current flow. The conductor bars of the first submodule and of the second submodule are in this case preferably oriented ?0 parallel to one another. Preferably, the first conductor bar of the first submodule runs parallel to the first conductor bar of the second submodule, and the second conductor bar of the first submodule runs parallel to the second conductor bar of the second submodule.
In an alternative embodiment, the first contacts of in each case one group of rechargeable ?5 batteries can be electrically connected to in each case one first conductor bar, and the second contacts of these groups of rechargeable batteries are in each case connected correspondingly to second conductor bars. The first conductor bar of a first group is in this embodiment preferably connected to the second conductor bar of a second group, wherein the second group is preferably arranged electrically directly behind the first group. The rechargeable batteries of one group are therefore connected in parallel, and the groups are connected in series with one another. The groups of one submodule which are electrically connected to one another are preferably in this case arranged one above the other, with the result that, on average, a current flow is produced in the first plane, in the second plane or parallel to these planes. The number of groups is in this case preferably 2 to 50, particularly preferably 2 to 20. The number of rechargeable batteries per group is preferably 2 to 15, particularly preferably 3 to 10, very particularly preferably 4 to 8. The electrical connection in parallel of the rechargeable batteries in one group, which for its part is connected in series with other groups, has the advantage that, firstly, a higher output voltage is achieved than in the case of a purely parallel arrangement, and a higher maximum current than in the case of a series arrangement. The size and number of groups can therefore be selected in order to provide a voltage which is sensible for the power supply system to be supplied, wherein a transformation prior to feeding into the power supply system is definitely sensible and conventional. Furthermore, the failure of an individual rechargeable battery does not result in the failure of the entire battery module, as in the case of a purely series circuit of the rechargeable batteries. However, the capacity of the battery module is thus reduced by the inverse value of the number of rechargeable batteries per group, i.e. in the case of n rechargeable batteries to the value of (n - 1) / n the capacity. If, for example, 4 rechargeable batteries are in each group, the capacity of the battery module decreases to 75% in the event of failure of one rechargeable battery. In the case of a purely parallel circuit, the capacity would only be reduced by the capacity of the failed rechargeable battery.
In a further alternative embodiment, all of the rechargeable batteries are connected in ?0 series. For this purpose, in each case the positive terminal of a rechargeable battery is connected to the following negative terminal of the next rechargeable battery. In this way, the maximum voltage is achieved. One disadvantage, however, is that the maximum current is low, i.e. only the maximum current that a single rechargeable battery can generate. In addition, the failure of only one rechargeable battery results in the failure of ?5 the entire battery module.
The arrangement of the electrical contacts and connecting electrical conductors is therefore selected in such a way that the direction of current flow in the case of current withdrawal from the battery module in the first submodule is (in particular spatially) opposite to the direction of current flow in the second submodule. For example, the averaged rms current flows from top to bottom in the first submodule, while the averaged rms current flows from bottom to top in the second submodule.
There are of course also partial currents which flow transversely to or at any desired angle with respect to the averaged rms current flow.
Particularly preferably, the module terminals for making electrical contact with the battery module are arranged at the top or at the bottom on the battery module. Particularly preferably, the module terminals for making electrical contact with the battery module are arranged at the top.
In a further embodiment of the invention, partial currents in the first submodule and partial currents in the second submodule are likewise arranged antiparallel to one another, i.e. in each case in the opposite direction. As a result, optimal compensation arises even in the case of partial currents.
In a further embodiment of the invention, the rechargeable batteries which are adjacent perpendicular to the current flow are connected electrically in parallel, and the rechargeable batteries which are adjacent in the direction of current flow are connected electrically in series. As a result, a grid-like structure results on each submodule, wherein the two grid-like structures of the two submodules are opposite one another. During use, the current then only flows through a very narrow and flat two-dimensional conductor ?0 loop, which minimizes the magnetic signature of the battery module during operation. Thus, a battery module according to the invention is particularly suitable for use on board a submarine.
In one further embodiment of the invention, each rechargeable battery has a cylindrical ?5 basic shape. Although other basic shapes are also conceivable, the cylindrical shape optimizes both production and packability in the submodules.
In a first embodiment of the invention, the first submodule and the second submodule are of identical design, but rotated through 1800 about an axis which is parallel to the current flow. This results in simple modular manufacture since all of the submodules have an identical design. Only the arrangement of the rechargeable batteries needs to be rotated in one submodule with respect to the other submodule for electrical reasons.
In a further alternative embodiment of the invention, the first submodule and the second submodule are designed in mirror-symmetrical fashion. Even in this case, the arrangement of the rechargeable batteries needs to be rotated in one submodule with respect to the other submodule for electrical reasons.
In a further embodiment of the invention, the rechargeable batteries are arranged hexagonally. This corresponds to the tightest packing of cylindrical objects. The first electrical contact and the second electrical contact of a rechargeable battery are each arranged one above the other in the direction of current flow. In simpler terms, the positive terminal and the negative terminal lie one above the other perpendicularly in the case of each one. The order of the electrical contacts is in each case reversed in the case of rechargeable batteries which are arranged offset and adjacent perpendicular to the current flow. If, for example, in the case of the top layer, the positive terminal is at the top and the negative terminal is at the bottom, in the layer lying therebeneath in overlapping fashion the negative terminal is at the top and the positive terminal is at the top. This results in the same electrical contacts preferably lying in a row. Particularly preferably, the same electrical contacts arranged next to one another perpendicular to the current flow are conductively connected to a metal strip. The metal strip has two further advantages in addition to the electrical contact-making. Firstly, a certain height difference ?0 between the electrical contacts of the adjacent layers can be compensated for by the width. Secondly, such a surface also represents a good heat exchange surface. This is connected to the electrodes in the rechargeable batteries via the electrical contacts, with the result that heat can be dissipated easily. And via this surface the heat can then be emitted further to the surrounding environment.
In a further embodiment of the invention, two electrical contacts, which are arranged one above the other in the direction of current flow, of two rechargeable batteries which are adjacent to one another in the direction of current flow are electrically connected to one another. In order to ensure a series circuit, these electrical contacts arranged one above the other in the direction of current flow are opposite contacts, practically speaking a positive terminal and a negative terminal. In a preferred embodiment of the invention, this electrical connection is designed as a fuse.
In a further embodiment of the invention, all of the rechargeable batteries of one submodule are connected to one another in a grid-like manner. Therefore, identical terminals lying next to one another are connected to one another, and likewise the opposite terminals adjacent to one another and lying one above the other in each case are connected to one another, with the result that, electrically, a grid is formed. Each submodule therefore has a grid, wherein these grids lie one above the other in planar parallel fashion. By virtue of this grid, the magnetic leakage field is minimized, and at the same time the temperature is made uniform.
In a further embodiment of the invention, a cooling device is arranged between the electrical contact connection of the rechargeable batteries of the first submodule and the electrical contact connection of the second submodule. Specifically owing to the two dimensional design of the contact connection, effective cooling is possible. Particularly preferably, the cooling devices and the electrical contact connections are only spaced so far apart from one another as is necessary for the electrical isolation. As a result, firstly the heat transfer is improved, and secondly the magnetic leakage field is minimized.
The two submodules together form a battery module. The battery module is directly or indirectly connected to an electrical secondary distribution system, i.e. the vehicle ?0 distribution system. At one end, the battery module has contacts for making contact with and connecting the electrical secondary distribution system. The submodules are connected to one another at the opposite end. In a further embodiment of the invention, the two submodules are electrically connected to one another at the lower end. The current therefore flows downwards in one submodule and upwards in the other ?5 submodule. The electrical contacts for making contact with the battery module are preferably arranged on the upper side and preferably as tightly next to one another as possible. This embodiment is specifically preferred for retrofitting on a submarine which has previously been equipped with lead-acid rechargeable batteries.
In a further alternative embodiment of the invention, the two submodules are electrically connected to one another at the upper end. The current therefore flows upwards in one submodule and downwards in the other submodule. The electrical contacts for making contact with the battery module are preferably arranged on the lower side and preferably as tightly next to one another as possible.
In one embodiment, the battery module has a first module contact and a second module contact. The first module contact is connected to the first submodule, and the second module contact is connected to the second submodule. For example, the first module contact is the positive terminal, and the second module contact is the negative terminal (or vice versa).
In a further embodiment, the battery module consists of n first submodules and n second submodules, where n is a natural number between 1 and 200, preferably between 2 and 40. The first submodules and the second submodules are in this case each arranged with respect to one another in the manner as described above, with the result that always two opposite submodules ensure the advantage according to the invention of minimizing the magnetic flux. The submodules are then in each case electrically connected to one another alternately on alternating sides, for example and in particular on the upper side and the lower side. The electrical connection of the battery module to the secondary distribution system or vehicle distribution system is in this case arranged on the first and on the last submodule. In a further embodiment of the invention, a casting compound is between the rechargeable batteries and between the submodules. Preferably, the casting compound ?0 is a thermosetting plastic, preferably an epoxy. Preferably, the casting compound has a modulus of elasticity of from 25 to 200 MPa, further preferably of from 50 to 125 MPa, particularly preferably of from 60 to 90 MPa, in accordance with ISO 527. Preferably, the casting compound has a tensile strength of from 2 to 20 MPa, further preferably of from 3 to 15 MPa, particularly preferably of from 4 to 9 MPa, in accordance with ISO 527. ?5 Preferably, the casting compound has a hardness of from 20 to 100 Shore D in accordance with ISO 53505, preferably of from 35 to 80, particularly preferably of from 50 to 75. Preferably, the thermal conductivity of the casting compound is greater than 0.03 W / (m - K), preferably greater than 0.2 W / (m - K), further preferably greater than 0.5 W / (m - K), particularly preferably greater than 0.8 W / (m - K). Even if a thermal conductivity which is as high as desired were to be desirable, realistically, however, the casting compound has a thermal conductivity which is less than 20 W / (m - K), more probably less than 5 W / (m - K), more probably still less than 2 W / (m - K). In particular, the thermal conductivity is determined in accordance with ISO 8894-1.
The battery module according to the invention is explained in more detail below with reference to an exemplary embodiment illustrated in the drawings.
Fig. 1 submodule Fig. 2 battery module
Fig. 1 shows part of a submodule 110, 120. For simplification purposes, a simple quadratic arrangement of 3x3 rechargeable batteries 10 is shown. In a real application, the number of rechargeable batteries 10 will be greater, but the principle remains the same. Each rechargeable battery 10 has a positive terminal 40 and a negative terminal 50. This simplified arrangement is merely selected for the purpose of improving the clarity of the drawing. In the case shown, the negative terminals 50 are connected to one another perpendicular to the current flow via contact connections 20. In the example shown, in the direction of current flow the negative terminals 50 in the top row of rechargeable batteries 10 are connected to the positive terminals 40 in the row of rechargeable batteries 10 therebeneath via contact connections 30 in the direction of current flow. The heat produced in a rechargeable battery 10 is also dissipated via the electrical contact connection of the terminals 40, 50 to the contact connection 20 in the form of a metal strip perpendicular to the current flow and therefore brought areally into the vicinity of the ?0 cooling device 160.
In addition, the average current flow 60 is shown, from a technical point of view flowing from positive terminal to negative terminal. Currents which flow into the contact connections 20 perpendicular to the current flow average each other out, with the result ?5 that, in sum, a current flow 60 is produced.
Fig. 2 shows a battery module 100 in a very simplified cross section. The battery module 100 has a first submodule 110 and a second submodule 120. All of the rechargeable batteries 10 of the first submodule 110 are contact-connected, as illustrated schematically in Fig. 1, via a first electrical contact connection 130, and all of the rechargeable batteries 10 of the second submodule 120, as illustrated schematically in Fig. 1, are contact connected via a second electrical contact connection 140. The first electrical contact connection 130 is electrically connected to the second electrical contact connection 140 via a connection 150. The battery module 100 can be electrically contact-connected and can make electrical energy available or can be charged via a first terminal 132 and a second terminal 142.
A cooling device 160 is arranged between the first electrical contact connection 130 and the second electrical contact connection 140. The spacing is kept as small as possible in order to enable an optimum heat transfer without posing the risk of a short circuit.
On average, the current flows, for example, from top to bottom in the first electrical contact connection 130 and from bottom to top in the second electrical contact connection 140, illustrated by the current flows 60. This results in a very narrow conductor loop, which generates a small magnetic flux owing to the small area.
Furthermore, it can be seen from the simplified schematic illustration that the first electrical contact connection 130 has a certain spatial extent and is not illustrated as an exact plane (as a line). Likewise, the second electrical contact connection 140 has a certain spatial extent and is not illustrated as an exact plane (as a line). This is necessary from a manufacturing point of view. Nevertheless, within the meaning of the invention, the first electrical contact connection 130 is arranged in the first plane and the second electrical contact connection 140 is arranged in the second plane.
Reference symbols
10 rechargeable battery 20 contact connection perpendicular to the current flow 30 contact connection in the direction of current flow 40 positive terminal 50 negative terminal 60 current flow 100 battery module 110 first submodule 120 second submodule 130 first electrical contact connection 132 first terminal 140 second electrical contact connection 142 second terminal 150 connection 160 cooling device

Claims (8)

Patent claims
1. A battery module (100), wherein the battery module (100) has a first submodule (110) and a second submodule (120), wherein the first submodule (110) has a plurality of rechargeable batteries (10), wherein the second submodule (120) has a plurality of rechargeable batteries (10), wherein each of the rechargeable batteries (10) has a first electrical contact and a second electrical contact, wherein the first electrical contact and the second electrical contact are each arranged on the same end side of the rechargeable battery (10), wherein the end side of the first submodule (110) with the electrical contacts is arranged in a first plane, wherein the end side of the second submodule (120) with the electrical contacts is arranged in a second plane, wherein the first plane is planar-parallel with respect to the second plane, wherein all of the first electrical contacts are connected to a first electrode of the rechargeable batteries (10), wherein all of the second electrical contacts are connected to a second electrode of the rechargeable batteries (10), wherein all of the electrical contacts of the first submodule (110) are arranged on that side of the first submodule (110) which is opposite the second submodule (120), wherein all of the electrical contacts of the second submodule (120) are arranged on that side of the second submodule (120) which is opposite the first submodule (110), wherein the first and second electrical contacts of the first submodule (110) are connected to one another in such a way that an on average current flow results in the first plane or planar-parallel with respect to the first plane, wherein the first and second electrical contacts of the second submodule (120) are connected to one another in such a way that an on average current flow results in the second plane or planar-parallel with respect to the second plane, wherein the current flow of the first submodule (110) and of the second submodule (120) are in the opposite direction to one another.
2. The battery module (100) as claimed in claim 1, characterized in that the rechargeable batteries (10) which are adjacent perpendicular to the current flow are connected electrically in parallel, and wherein the rechargeable batteries (10) which are adjacent in the direction of current flow are connected electrically in series.
3. The battery module (100) as claimed in one of the preceding claims, characterized in that the rechargeable batteries (10) are arranged hexagonally, wherein the first electrical contact and the second electrical contact are each arranged one above the other in the direction of current flow, wherein the order of the electrical contacts is in each case reversed in the case of rechargeable batteries (10) which are arranged offset and adjacent perpendicular to the current flow.
4. The battery module (100) as claimed in one of the preceding claims, characterized in that identical electrical contacts arranged next to one another perpendicular to the current flow are conductively connected to a metal strip.
5. The battery module (100) as claimed in one of the preceding claims, characterized in that two electrical contacts, which are arranged one above the other in the direction of current flow, of two rechargeable batteries (10) which are adjacent in the direction of current flow are electrically connected to one another.
6. The battery module (100) as claimed in one of the preceding claims, characterized in that all of the rechargeable batteries (10) of a submodule (110, 120) are connected to one another in a grid-like manner.
7. The battery module (100) as claimed in one of the preceding claims, characterized in that a cooling device (160) is arranged between the electrical contact connection (20, 30, 130, 140) of the rechargeable batteries (10) of the first submodule (110) and the electrical contact connection (20, 30, 130, 140) of the second submodule (120).
8. The battery module (100) as claimed in one of the preceding claims, characterized in that the two submodules (110, 120) are electrically connected to one another at the lower end.
AU2021370773A 2019-10-29 2021-10-19 Battery module with a low stray field Pending AU2021370773A1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102019216606.7A DE102019216606A1 (en) 2019-10-29 2019-10-29 Battery module
AUPCT/EP2020/000182 2020-10-28
PCT/EP2020/000182 WO2021083538A1 (en) 2019-10-29 2020-10-28 Shock-proof battery module, in particular for use in a submarine
DE102021200765.1 2021-01-28
DE102021200765.1A DE102021200765A1 (en) 2019-10-29 2021-01-28 Low stray field battery module
PCT/EP2021/078967 WO2022090002A1 (en) 2019-10-29 2021-10-19 Battery module with a low stray field

Publications (1)

Publication Number Publication Date
AU2021370773A1 true AU2021370773A1 (en) 2023-06-08

Family

ID=73694955

Family Applications (2)

Application Number Title Priority Date Filing Date
AU2020376136A Active AU2020376136B2 (en) 2019-10-29 2020-10-28 Shock-proof battery module, in particular for use in a submarine
AU2021370773A Pending AU2021370773A1 (en) 2019-10-29 2021-10-19 Battery module with a low stray field

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AU2020376136A Active AU2020376136B2 (en) 2019-10-29 2020-10-28 Shock-proof battery module, in particular for use in a submarine

Country Status (5)

Country Link
EP (2) EP4052324A1 (en)
KR (2) KR20220024851A (en)
AU (2) AU2020376136B2 (en)
DE (2) DE102019216606A1 (en)
WO (2) WO2021083538A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021129317A1 (en) 2021-11-11 2023-05-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Battery device for an at least partially electrically operated motor vehicle
DE102022000513A1 (en) * 2022-02-10 2023-08-10 Mercedes-Benz Group AG Battery module with multiple battery cells
DE102022103336A1 (en) 2022-02-14 2023-08-17 Bayerische Motoren Werke Aktiengesellschaft Electrical energy storage with degassing room
DE102022110840A1 (en) 2022-05-03 2023-11-09 Bayerische Motoren Werke Aktiengesellschaft Means of transport, device for storing electrochemical energy and manufacturing process
DE102022208979A1 (en) 2022-08-30 2024-02-29 Thyssenkrupp Ag Method for increasing the range of a submerged submarine
EP4340113A1 (en) 2022-09-13 2024-03-20 thyssenkrupp Marine Systems GmbH Battery module

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02174077A (en) 1988-12-27 1990-07-05 Matsushita Electric Ind Co Ltd Solid secondary battery and manufacture thereof
DE102008013188A1 (en) * 2008-03-07 2009-09-17 Johnson Controls Hybrid And Recycling Gmbh Electrochemical accumulator and vehicle with an electrochemical accumulator
DE102009000675A1 (en) 2009-02-06 2010-08-12 Robert Bosch Gmbh Rechargeable battery e.g. nickel-metal hydride battery, for use as electro-chemical energy storage in e.g. electric vehicle, has line elements comprising specific distance to each other in region, where distance is lesser than region
FR2962261B1 (en) * 2010-07-02 2013-08-02 Saft Groupe Sa BATTERY OF ELECTROCHEMICAL GENERATORS COMPRISING FOAM AS FILLING MATERIAL BETWEEN GENERATORS
JP2013191400A (en) 2012-03-14 2013-09-26 Hitachi Ltd Battery system
DE102013203204B4 (en) 2013-02-27 2021-05-27 Robert Bosch Gmbh A battery comprising a first and a second battery module
DE102013016101B4 (en) * 2013-09-27 2015-05-21 Audi Ag Method of manufacturing a battery module and battery module
US9478779B2 (en) * 2014-08-20 2016-10-25 Ford Global Technologies, Llc Cell to cell terminal connections for a high voltage battery
DE102015219280A1 (en) * 2015-10-06 2017-04-06 Robert Bosch Gmbh Battery system with potting compound
DE102016001287B4 (en) * 2016-02-05 2020-03-05 Switop Gmbh Multi-cell battery pack, use of a battery pack in an electrical device, and method of manufacturing a battery pack
JP6363645B2 (en) * 2016-03-09 2018-07-25 株式会社東芝 Battery module, battery, storage battery, and electrical device
DE102017214289A1 (en) * 2017-08-16 2019-02-21 Robert Bosch Gmbh Battery module and vehicle with the battery module
FR3085803B1 (en) * 2018-09-12 2020-10-09 Commissariat Energie Atomique ACCUMULATOR BATTERY PACK, INCLUDING MAGNETIC SHUNTS ACTIONABLE ON REQUEST FOR THE ELECTRIC SWITCHING OF ONE OR MORE OF THE ACCUMULATORS

Also Published As

Publication number Publication date
KR20220024851A (en) 2022-03-03
EP4237323A1 (en) 2023-09-06
KR20230093000A (en) 2023-06-26
WO2021083538A1 (en) 2021-05-06
AU2020376136A1 (en) 2022-02-24
EP4052324A1 (en) 2022-09-07
DE102021200765A1 (en) 2022-04-28
DE102019216606A1 (en) 2021-04-29
WO2022090002A1 (en) 2022-05-05
AU2020376136B2 (en) 2022-12-15

Similar Documents

Publication Publication Date Title
AU2021370773A1 (en) Battery module with a low stray field
KR102029407B1 (en) Battery system
CN110710051B (en) Battery pack
EP2797140B1 (en) Battery pack having novel structure
TW569484B (en) Monoblock battery assembly
KR20190122407A (en) Battery Module Having Bus-bar and Battery Pack
KR101287107B1 (en) Battery module with connecting member
US20120115011A1 (en) Battery module having battery cell holder
CN209447876U (en) A kind of battery modules
EP3387683B1 (en) Force generating assembly for a battery pack
CN106935780B (en) Battery module and battery pack
JP2007280831A (en) Power supply device
US20220037707A1 (en) Battery Pack and Holder
EP3506383A1 (en) Battery module
US20220045387A1 (en) Battery module
CN216389649U (en) Battery module
KR20200024249A (en) Battery cell
CN112787043B (en) Battery module and electric device
EP3540819B1 (en) Battery pack
US20230246278A1 (en) Battery pack
CN105024022B (en) A kind of laminar soft bag lithium ionic cell module and its battery pack
KR102436424B1 (en) Battery module
EP3540820B1 (en) Battery pack
US20220109216A1 (en) Battery module and battery pack
KR20200056936A (en) Busbar for a Battery Module and Battery Module comprising the same