NL2033228B1 - Battery module for a modular battery pack - Google Patents
Battery module for a modular battery pack Download PDFInfo
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- NL2033228B1 NL2033228B1 NL2033228A NL2033228A NL2033228B1 NL 2033228 B1 NL2033228 B1 NL 2033228B1 NL 2033228 A NL2033228 A NL 2033228A NL 2033228 A NL2033228 A NL 2033228A NL 2033228 B1 NL2033228 B1 NL 2033228B1
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- 238000003491 array Methods 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims description 74
- 239000012530 fluid Substances 0.000 claims description 44
- 238000000034 method Methods 0.000 claims description 17
- 239000012809 cooling fluid Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 6
- 230000000295 complement effect Effects 0.000 description 5
- 238000005304 joining Methods 0.000 description 4
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- 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
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- 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
-
- 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
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Aviation & Aerospace Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Title: Battery module for a modular battery pack Abstract The disclosure relates to a battery module for a modular battery pack comprising a plurality of battery cell arrays; a first module segment configured for accommodating a first one of the battery cell arrays; and a second module segment configured for accommodating a second one of the battery cell arrays. The first module segment and the second module segment are configured to be joined so as to form the battery module. The battery module is extendable by interposing one or more mutually identical intermediate module segments between the first module segment and the second module segment, wherein each intermediate module segment is configured for accommodating a respective further one of the battery cell arrays. [+Fig. 1]
Description
P133058NL00
Title: Battery module for a modular battery pack
The invention relates to a battery module for a modular battery pack.
Battery packs for powering electric passenger cars benefit from mass production, as their specifications are substantially uniform and their production numbers are large. For most other applications however, such as for electrically powered machinery and construction vehicles, the production numbers are relatively small, and the technical requirements vary greatly depending on the application. The production of battery packs for such machinery hence requires much customization.
Modular battery packs can be used for many of such non- automotive applications, as they are easily scalable. Modular battery packs include a plurality of interconnected battery modules, wherein each battery module 1s identical and of a fixed design to hold a set of battery cells. The battery modules can be spatially arranged and electrically interconnected in various ways, to provide the battery pack with a desired shape and power characteristics. The battery module can accordingly be produced in large numbers, which provides a production cost and efficiency benefit.
It is an object to propose an improved battery module for a modular battery pack. It is also an object to propose a method of creating a battery module and battery pack. It is a particular object to provide flexibility in the design and production of a modular battery pack, preferably while reducing associated costs and resources.
According to aspect, a battery module for a modular battery pack is provided. The battery module comprises a plurality of battery cell arrays; a first module segment configured for accommodating a first one of the battery cell arrays; and a second module segment configured for accommodating a second one of the battery cell arrays. The first module segment and the second module segment are configured to be joined so as to form the battery module. The battery module is extendable by interposing one or more mutually identical intermediate module segments between the first module segment and the second module segment, wherein each intermediate module segment is configured for accommodating a respective further one of the battery cell arrays. Hence, the battery module has a segmented structure, allowing the capacity of the battery module to be increased by adding intermediate module segments. The battery module 1s particularly so arranged that any two of the first module segment, the second module segment and the intermediate module segment can be joined, regardless of the number of intermediate module segments. The battery module may for example comprise only the first module segment and the second module segment, without interposition of an intermediate module segment. The battery module may comprise any number of intermediate module segments between the first module segment and the second module segment, such as zero, one, two, or more, thereby increasing the spatial and functional extent of the battery module. The battery module may hence include a middle section between the first and second module segments of repeating intermediate segments.
Multiple battery modules can be electrically interconnected to form a battery pack. The battery modules may be interconnected in various ways, e.g. in parallel and/or in series, to adapt, e.g., an output power, output voltage, and/or energy storage capacity of the battery pack to the intended application. This modularity of the battery pack as such provides for great flexibility and scalability in the design of the battery pack. The flexibility and scalability is further increased by the segmentation of the battery module itself into the first, second and intermediate module segments.
Hence, a modular battery pack can be obtained comprising multiple interconnected battery modules, wherein each of said battery modules is in turn of a segmented design including at least the first module segment and the second module segment optionally interposed by one or more intermediate module segments. It will be appreciated that the battery modules of the modular battery pack need not be identical to each other.
The module segments of the battery module may for example each beof a standardized design, which allows components for it to be produced in large numbers. Components of the battery module may be segmented accordingly, and may be designed such that predefined technical requirements are met regardless of the number of interposed intermediate module segments. For example, a cooling structure of the battery module for cooling the battery cells arrays accommodated thereby may be so arranged such that a requisite cooling is achievable regardless of the number of interposed intermediate module segments.
Some components of different segments may be produced as separate complementary components, which are attached to each other when joining the segments. Some components of different segments may be integrated into a single integrated component, and may be produced as an integrated body that includes multiple segments. Such integrated components, do not require an additional attachment step when assembling the battery module. The manufacturing of such integrated parts may benefit from the segmented nature of the component, particularly from the repeating intermediate segments. Because the battery module as such provides for a highly scalable build of a modular battery pack, the number of interposed intermediate module segments may in practice be limited, for example to at most five, for example at most three, such as at most two intermediate module segments. The integrated components of the module may thus be manufactured in a limited number of predetermined sizes, corresponding the number of interposed intermediate module segments. The separate segment components may for example at most include three different segment components, corresponding to the first, second and intermediate module segment respectively. Some components of the second module segment may even be identical to components of the intermediate module segment and/or the first module segment. Also, for several components, each module may require only a fixed number, irrespective of the number of segments. For example, each module may require a single module controller e.g. embedded on a PCB, a single module terminal, a single cooling fluid inlet and outlet port, a single proximal and distal end plate, etc.. Production numbers of such components are unaffected by the segmented construction of the module, while design flexibility is increased.
Hence, benefits associated with large-scale production of the module components can be substantially maintained, while flexibility as to the battery module capacity and size is increased.
The battery module may comprise a plurality of battery cell arrays; a first module segment for accommodating a first one of the battery cell arrays; a second module segment for accommodating a second one of the battery cell arrays; one or more intermediate module segments for accommodating a respective further one of the battery cell arrays, wherein the first module segment, the one or more mutually identical intermediate module segments and the second module segment are joined, with the one or more intermediate module segments interposed between the first module segment and the second module segment.
The intermediate module segment may be configured to interface, at opposing sides, with respectively the first module segment and the second module segment.
Optionally, the first module segment, the second module segment and the one or more identical intermediate module segments have a predetermined mutually equal width dimension, wherem the battery module is extendable in a length direction transverse to the width dimension. The battery module may hence be extended in the length direction, while the width of the battery module remains constant. 5 Optionally, the first module segment, the second module segment and the one or more identical intermediate module segments have a predetermined mutually equal height dimension, wherein the battery module is extendable in the length direction transverse to the height dimension. The battery module may hence be extended in the length direction, while the width and/or the height of the battery module remains constant. The battery module may for example have a constant cross-section in a plane transverse to the length direction, irrespective of the number of module segments.
Optionally, each battery cell array comprises cylindrically shaped battery cells that are arranged in the array with their longitudinal axis in parallel. The battery cell array may particularly include multiple rows of battery cells, wherein the rows are mutually staggered. The battery cell array may be arranged such that the longitudinal axes of the battery cell arrays are transverse to the length direction of the battery module. The longitudinal axis may for example be parallel to the height direction of the battery module. The rows of cells may extend in the length direction of the battery module. The rows of cells may extend parallel to each other in the width direction of the battery module.
Optionally, the battery module comprises a universal interface, which interface is so configured to join any two of the first module segment, the second module segment and the intermediate module segment. Hence, the universal interface may be between the first and the second module segment, between the first and the intermediate module segment, between two intermediate module segments, and between the intermediate module segment and the second module segment.
Optionally, the battery module is configured to include a first interface between the first module segment and the second module segment, and a second interface between the first module segment and any one of the intermediate module segments, and wherein the first interface and the second interface are identical.
Optionally, the battery module is configured to include a third interface between the second module segment and any one of the intermediate module segments, and wherein the third interface is identical to the first and second interfaces.
Optionally, the battery module is configured to include a fourth interface between any two of the intermediate module segments, and wherein the fourth interface is identical to the first and second interfaces.
Optionally, the battery module comprises a cooling body, wherein the first module segment comprises a first cooling body segment of the cooling body arranged for cooling the first battery cell array; the second module segment comprises a second cooling body segment of the cooling body arranged for cooling the second battery cell array; and each intermediate module segment comprises an intermediate cooling body segment of the cooling body arranged for cooling the respective further battery cell array. The battery module may comprise, e.g. as part of the universal interface, a cooling body interface, which cooling body interface is so configured to thermally connect any two of the first cooling body segment, the second cooling body segment and the intermediate cooling body segment.
Optionally, each module segment of the battery module comprises a cooling body space arranged for accommodating the cooling body segment and a support structure for supporting a battery cell array, wherein the support structure is so arranged that, if the cooling body space accommodates the cooling body segment, the battery cell array 1s in thermal contact with the battery cell array. For some applications, it may not be needed to include a cooling body. The support structure can accordingly support the battery cell array, irrespective of the inclusion of a cooling body in the cooling body space. This allows for effective assembly of the battery module, since a step of including the cooling body can be selectively omitted or added, without affecting the remaining assembly steps. The support structure may be so arranged that the battery cell array is thermally isolated from a module housing, irrespective of the cooling body being included in the cooling body space.
Optionally, the cooling body comprises a fluid circuit for guiding a cooling fluid between a fluid inlet port and a fluid outlet port, the first cooling body segment, the second cooling body segment and each intermediate cooling body segment comprising respectively a first circuit segment of the circuit, a second circuit segment of the fluid circuit, and an intermediate circuit segment of the fluid circuit. The battery module may comprise, e.g. as part of the universal interface, a circuit interface, which circuit interface is so configured to fluidly connect any two of the first circuit segment, the second circuit segment and the intermediate circuit segment.
Hence, regardless of the number of interposed intermediate module segments, a cooling circuit can be obtained in which the cooling fluid is guide from the fluid inlet port to the fluid outlet port.
Optionally, the cooling body is configured to include a first circuit interface between the first circuit segment and the second circuit segment configured for fluidly connecting the first circuit segment to the second circuit segment, and a second circuit interface between the first circuit segment and any one of the intermediate circuit segments, wherein the first circuit interface and the second circuit interface are identical. It will be appreciated that the first and second circuit interfaces may be part of respectively the first module interface and the second module interface.
Optionally, the cooling body is configured to include a third circuit interface between the second circuit segment and any one of the intermediate circuit segments, and wherein the third circuit interface is identical to the first and second circuit interfaces. It will be appreciated that the third circuit interface may be part of the third module interface.
Optionally, the cooling body is configured to include a fourth circuit interface between any two of the intermediate circuit segments, and wherein the fourth circuit interface is identical to the first and second circuit interfaces. It will be appreciated that the fourth circuit interface may be part of the fourth module interface.
Optionally, the first fluid circuit segment or the second fluid circuit segment comprises the fluid inlet port and the fluid outlet port. The fluid inlet and outlet ports may hence be easily accessible, regardless of the number of interposed intermediate module segments.
Optionally, the fluid inlet port and the fluid outlet port are arranged at the same side of the first or second fluid circuit segment. The fluid inlet and outlet ports may particularly be at a side of the first module segment opposite a side at which the first module segment is joined with the intermediate module segment or the second module segment.
Optionally, the battery module comprises a sensor body, wherein the first module segment comprises a first sensor body segment of the sensor body for sensing a parameter of the first module segment; the second module segment comprise a second sensing body segment of the sensing body for sensing a parameter of the second module segment; and each intermediate module segment comprises a intermediate sensing body segment of the sensing body for sensing a parameter of the respective intermediate module segment. The battery module may comprise, e.g. as part of the universal interface, a sensor body interface, which sensor body interface is so configured to communicatively connect any two of the first sensor body segment, the second sensor body segment and the intermediate sensor body segment. The sensor body may for example be, or include, a printed circuit board. The sensor body may for example comprise a temperature sensor body arranged to sense a temperature.
Optionally, the sensor body is configured to include a first sensor body interface between the first sensor body segment and the second sensor body segment configured for connecting the first sensor body segment to the second sensor body segment, and a second sensor body interface between the first sensor body segment and any one of the intermediate sensor body segments, wherein the first sensor body interface and the second sensor body interface are identical. It will be appreciated that the first and second sensor body interfaces may be part of respectively the first module interface and the second module interface.
Optionally, the sensor body is configured to include a third sensor body interface between the second sensor body segment and any one of the intermediate sensor body segments, and wherein the third sensor body interface is identical to the first and second sensor body interfaces.
It will be appreciated that the third sensor body interface may be part of the third module interface.
Optionally, the sensor body is configured to include a fourth sensor body interface between any two of the intermediate sensor body segments, and wherein the fourth sensor body interface is identical to the first and second sensor body interfaces. It will be appreciated that the fourth circuit interface may be part of the fourth module interface.
Optionally, the first module segment or the second module segment comprises a controller for controlling the battery module.
Optionally, the battery module comprises one or more interface boards, each being configured for electrically connecting any two of the first battery cell array, the second battery cell array and the further battery cell array with each other.
Optionally, each module segment includes a mounting structure for mounting a respective battery cell array thereto, wherein the mounting structure comprises first fastener sites arranged in a first column extending along the width of the module segment at a first side of the module segment,
and second fastener sites arranged in a second column extending parallel to the first column at a second side of the module segment opposite the first side, the first and second columns being staggered with respect to each other. At the fastener sites, a battery cell array may be fastened to the module segment. The fastener sites may hence be arranged at a boundary between adjacent module segments. The staggered arrangement of the first column and the second column for each module segment consequently can, at or near each segment boundary, stagger the columns of the adjacent module segments. Hence the staggered columns can provide sufficient spacing between the mounting sites of different adjacent module segments, to avoid interference between these mounting sites. For example, the second column of the first module segment and the first column of the intermediate module segment may be arranged on either side of a module segment boundary, and may hence be relatively proximate one another. By staggering the columns of each module segment, the fastener sites may not interfere with each other. The fastener sites may be formed by holes, bolts, adherence surfaces, etc..
Optionally, each battery cell array includes cylindrically shaped battery cells that are arranged in the array with their longitudinal axis in parallel in mutually staggered cell rows, and wherein the battery module is so arranged that, when accommodating said battery cell array, each staggered cell row extends in the length direction of the battery module, and each of the fastener sites is arranged at a receding end of a cell row.
Arranging the battery cells in staggered rows provides for a spatially compact array. The staggered arrangement of the rows causes some row ends to be advancing, i.e. extending beyond another, particularly an adjacent, cell row of the array. A receding end of a cell row is an end of a cell row which is not advancing. A receding row end of a cell row particularly lies between two adjacent advancing row ends. Hence, a particular compact arrangement can obtained, wherein the spaces at opposite ends of the array that arise from the staggering of the rows are efficiently used for the fastener sites to mount a battery cell array to a module segment.
Each cell array may for example include a battery cell retainer arranged to retain the battery cells of the battery cell array in a fixed predetermined arrangement relative to each other. Each battery cell retainer may include a complementary mounting structure, complementary to the mounting structure of the module segments. Each battery cell array may hence be mounted to a module segment by fastening the battery cell retainer at the fastener sites of the mounting structure.
According to an aspect, a modular battery pack for powering an electric drive is provided, comprising one or more battery modules as described herein. The battery pack particularly comprises a plurality of battery modules. The number of battery modules, and the way in which the battery modules are electrically interconnected, e.g. in series and/or in parallel, may be adapted to the intended application for the battery pack.
The battery modules may for example be so connected to obtain a battery pack with a desired output voltage, output power and/or storage capacity.
The battery modules of the battery pack may also be physically coupled to each other, and spatially so arranged relative to one another to obtain a battery pack with a desired form factor. The battery pack may for example comprise a pack housing, housing the plurality of battery modules. The battery pack may for example comprise a pack terminal, for connecting the battery pack to an electric drive and/or a charging station.
According to an aspect, a vehicle, particularly an off-road vehicle, such as a construction vehicle, 1s provided, comprising an electric drive and a modular battery pack as described herein for powering the electric drive.
According to a further aspect, a method of creating a battery module for a modular battery pack is provided. The method comprises providing a plurality of battery cell arrays; providing a first module segment for accommodating a first one of the battery cell arrays; and providing a second module segment for accommodating a second one of the battery cell arrays, the second module segment being configured to interface with the first module segment. The method further comprises providing one or more identical intermediate module segments for accommodating a respective further one of the battery cell arrays. Each of the one or more identical intermediate module segments is configured to be interposed between the first module segment and the second module segment, and interface at a first side with the first module segment or another intermediate module segment of the plurality of identical intermediate module segments, and at a second side with the second module segment or another intermediate module segment of the plurality of identical intermediate module segments.
The method comprises interposing zero, one or more of said one or more identical intermediate module segments between the first module segment and the second module segment and joining the first module segment, the second module segment and the interposed zero, one or more intermediate module segments. Hence, the method can provide a segmented battery module having at least the first and the second module segment, wherein the module segment can be extended by interposing any number of intermediate module segments between the first and second module segment. The first and second module segments are configured such that they can be joined together to form the battery module, and that they be joined to one of the intermediate module segments.
The method may for example comprise providing a universal interface so configured to join any two of the first module segment, the second module segment and the intermediate module segment. At the universal interface, the joined module segments are complementary to one another. Hence, the universal interface may be between the first and the second module segment, between the first and the intermediate module segment, between two intermediate module segments, and between the intermediate module segment and the second module segment.
Optionally, the method comprises determining a desired module capacity and/or a desired module dimension; determining, based on the determined desired module capacity and/or desired module dimension, a number of intermediate module segments to be interposed between the first module segment and the second module segment; and interposing the determined number of intermediate module segments between the first module segment and the second module segment and joining the first module segment, the second module segment and the interposed number intermediate module segments. The battery module capacity may for example include an amount of stored electric energy, an input and/or output power, an input and/or output voltage output, a charge or discharge current, etc.. The module dimension may for example include a size or form factor in any direction, and/or a volume.
According to an aspect, a method of creating a battery pack is provided, comprising creating one or more battery modules, e.g. as described herein, according to the method as described herein, and interconnecting the one or more battery modules.
Optionally, the method comprises determining a desired pack capacity and/or a desired pack dimension; determining, based on the determined desired pack capacity and/or desired pack dimension, a desired module capacity and/or module dimension; determining, based on the determined desired module capacity and/or desired module dimension, a number of intermediate module segments to be interposed between the first module segment; and interposing the determined number of intermediate module segments between the first module segment and the second module segment and joining the first module segment, the second module segment and the interposed number intermediate module segments. The battery pack capacity may for example include an amount of stored electric energy, an input and/or output power, an input and/or output voltage output, a charge or discharge current, etc.. The pack dimension may for example include a size or form factor in any direction, and/or a volume.
It will be appreciated that any of the aspects, features and options described herein can be combined. It will particularly be appreciated that any of the aspects, features and options described in view of the battery module apply equally to the battery pack, and vice versa. It will furthermore be particularly appreciated that any of the aspects, features and options described in view of the battery module apply equally to methods, and vice versa.
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings in which:
Figure 1 and 2 show an examples of battery module;
Figure 3 shows an example of a battery cell array;
Figure 4 and 5 show an example of a battery module;
Figure 6 shows an example of a cooling body;
Figure 7 shows a battery pack.
Figure 1 shows a schematic plan view of a battery module 1000.
The battery module 1000 comprises a first module segment 100 holding a first battery cell array 5.1, and a second module segment 200 holding a second battery cell array 5.2. The first and second module segments 100, 200 are joined and interface one another at a first interface 10.1. The first module segment 100, here, includes a module terminal, particularly a positive module terminal 51 and a negative module terminal 52, for electrically connecting the battery module 1000 to an external component, such as to a another battery module or an electric drive. In this example, the first module segment 100 also includes a fluid inlet port 61 and a fluid outlet port 62 of a cooling fluid circuit of the battery module.
The battery module 1000 comprises a module housing 80, including a first housing segment associated with the first module segment 100 and a second housing segment associated with the second module segment 200.
A battery cell retainer 63 is provided for retaining the battery cells of a respective battery cell array 5 in a fixed arrangement relative to each other. Hence, here, each array 5 is held by a separate battery cell retainer, allowing for easy assembly and adaptability of the battery module. In particular, each battery cell array may be substantially identical. This way, a standard battery cell array can be defined. This also allows the design of a standard battery cell retainer for retaining the battery cells of the standard array 5 in a fixed arrangement. The arrangement of the battery cells in the array 5 may for example be identical across all arrays 5 of the module 1000.
Figure 2 shows a schematic plan view of a battery module 1000, comprising the first module segment 100, the second module segment 200, and further comprising an intermediate module segment 300 interposed between the first 100 and second module segment 200. The intermediate module segment 300 here holds a third battery cell array 5. Compared to the battery module 1000 of figure 1, the battery module 1000 of figure 2 has been extended by the interposition of the intermediate module segment 300.
Hence, the capacity of the battery module 1000 has been expanded compared by the addition of the intermediate module segment 300. Also, the overall size of the battery module 1000 has been increased. In this example, the battery module is extendable in a longitudinal direction, here corresponding to the y-direction. In a transverse direction, here corresponding to the x-direction, the dimension of the battery module 1000 remains constant. Hence, the battery module 1000 has an extendable length, and a non-extendable width. Also in a height of the battery module 1000, here transverse to the x-y plane, 15 in this example non-extendable.
The first and second module segments 100, 200 are hence, in these examples, arranged on opposite longitudinal ends of the battery module 1000.
The number of interposed intermediate module segments may in theory be infinite, but it will be appreciated that the number of interposed intermediate module segments may in practice be at most five, for example at most three, such as at most two, particularly because the battery module 1000 predominantly provides for the scalability and customizability of a modular battery pack.
The first module segment 100 is joined with the intermediate module segment 300 and interfaces therewith at a second interface 10.2.
The second module segment 200 is also joined with the intermediate module segment 300, here at a side opposite the first module segment 100, and interfaces with the intermediate module segment at a third interface 10.3.
The first interface 10.1, the second interface 10.2 and the third interface 10.3 are here identical to each other, to enable the selective interposition of the intermediate module segment 300. A fourth interface 10.4 may be defined between two Joined intermediate module segments 300. The fourth interface 10.4 is identical to the first, second and third interfaces 10.1-10.3.
The interfaces are accordingly configured so that a battery module 1000 can be formed, regardless of the number of number of intermediate module segments 300, without having to redesign the individual module segments 100, 200, 300.
The battery cell array 5 may particularly be of a standardized design, to enable efficient manufacture and assembly of the extendable battery module 1000. An example of an, e.g. standardized battery cell array 5 is shown in figure 3. The battery cell array 5 includes fourteen rows of six battery cells in that example, hence providing a substantially rectangularly shaped array 5. It will be appreciated that a different number cells and other arrangements thereof are also possible. The battery cells of the array are held by a cell retainer 63, which here includes an upper retainer part 64 and a lower retainer part 65 which clamp the battery cells of the array 5 therebetween. The battery cell retainer 63 may also comprise a spacer structure for providing a spacing between the battery cells. The battery cell 5 retainer also comprises fastener cites 15, here formed by holes for receiving a screw or bolt therethrough. The fastener cites 15 are here complementary to a mounting structure of the battery module housing 80, for mounting the battery cell array 5 thereto.
The battery cells 1 of each battery cell array 5 have in these examples a cylindrically shaped battery body, with a circular cross section, which extends between a top face and a bottom face. It will be appreciated that differently shaped battery cells can also be used, such as pouch and prismatic-shaped cells. Here, each battery cell 1 comprises at its respective top face a positive pole terminal 2 and a negative pole terminal 3 of the battery cell 1. The positive pole terminal 2 is in this example at a central portion of the top face, while the negative pole terminal 3 is at a circumferential portion of the top face. The bottom face, opposite the top face can for example be accessible for cooling the battery cells in use. The battery cells 1 may for example be supported by a cool plate in thermal contact with the bottom face for cooling the array 5 of battery cells 1. The battery cells 1 may be selected from various standard dimensioned cells available on the market, such as a 21700, 18650 battery cell, or other.
The battery cells 1 are arranged in rows along the longitudinal direction of the array 5, here the y-direction. The rows are, here, staggered with respect to each other, for providing a spatially efficient arrangement of the battery cells 1, as well as for an efficient, and preferably nonoverlapping, interconnection of the battery cells 1. Columns of battery cells 1 may be defined in the transverse direction, here the x-direction. The batter cell array 5 in this example is shown to include three columns, each including three battery cells 1. In this example, the battery cell array 5 is shown to include nine battery cells 1.1-1.9, but it will be appreciated that the battery cell array 5 may include any number of battery cells 1. The battery cells are in this example arranged in three parallel rows, each including three battery cells. The battery cells 1 of the battery cell array 5 may be held by a battery cell retainer 63.
In these examples, the battery cells 1 of the battery cell array 5 are electrically interconnected by a plurality of separate connector arms 4. The connector arms of the plurality of connector arms 4 are physically separate from one another. Each connector arm 4 of the plurality of connector arms 4 connects at most two battery cells with each other. Each connector arm particularly connects at most two pole terminals with each other. Each connector arm 4 defines an electrically conductive path, particularly a nonbranching path, that extends between a first end and a second end. The first and second end attach to pole terminals of two respective battery cells of the array 5, hence electrically connecting at most two battery cells with each other. Each connector arm particularly connects two adjacent battery cells with one another, hence minimizing the extent of the connector arms.
The connector arms 4 may particularly be noncrossing, to minimize the risk of the connector arms contacting each other and creating unwanted short- circuits. In this example, each of the connector arms 4 is formed by a single bonding wire. This provides an easily adaptable way of interconnecting the battery cell array 5. Here, the bonding wires have a circular cross-section, but it will be appreciated that the bonding wires may have alternatively shaped cross-sections, such as rectangular. It will also be appreciated that the bonding wires of the assembly may differ from one another in cross- sectional shape.
The plurality of separate connector arms 4 includes parallel connector arms 4a connecting two battery cells 1 in parallel, and serial connector arms 4b connecting two battery cells 1 in series. The parallel and serial connector arms 4 can collectively interconnect the battery cells 1 of the array 5 in a desired electric circuit. The parallel connector arms 4a connect pole terminals of equal polarity with each other. The parallel connector arms are in this example attached, e.g. with one end thereof, to the positive pole terminal 2 of a battery cell 1 and, e.g. with an opposite end thereof, to the positive pole terminal 2 of another battery cell 2 of the array 5. It will be appreciated that, alternatively, the parallel connector arms could be attached, e.g. with one end thereof, to the negative pole terminal 3 of a battery cell 1 and, e.g. with an opposite end thereof, to the negative pole terminal 3 of another battery cell 2 of the array 5 10. In these examples, the battery cells 1 within the same row are connected to each other in parallel, by means of the parallel connector arms. In the example of figure 1, the parallel connector arms 4a connect the positive pole terminals 2 of the battery cells in a row with each other, whereas in the example of figure 3, the parallel connector arms 4a connect the negative pole terminals 3 of the battery cells in a row with each other.
The serial connector arms 4b connect pole terminals of opposite polarity with each other. The serial connector arms are attached, e.g. with one end thereof, to the positive pole terminal 2 of a battery cell 1 and, e.g. with an opposite end thereof, to the negative pole terminal 3 of another battery cell 2 of the battery cell array 5, or vice versa. In this example, the battery cells 1 of different rows are connected to each other in series. The battery cells 1 of different columns are connected to each other in parallel.
While the examples show an electrical interconnection of the battery cells by means of separate connector arms, it will be appreciated that other means for interconnection are also envisaged, such as collector plates and bars. For example, the parallel connected cells within a single row of battery cells, here connected to each other via the separate connector arms, may alternatively be connected to each other by other means, such as a bar.
The first module segment 100 in this example also comprises a module controller 30. The module controller 30 may for example be arranged for monitoring and controlling the battery module 1000, e.g. controlling its temperature, power output and input, etc.. The first module segment 100 may for example comprise a controller terminal 71, 72 for connecting the module controller 30 externally, such as to the pack controller of a battery pack. Battery cells 1 at a second edge of the first battery cell array 5 held by the first module segment 100 are connected to the controller 30 by a respective one of the plurality of separate connector arms 4. The controller 30 here includes contact zones 31, 32, 33 for attaching a contact arm 4 thereto.
An interface board 40 is provided for electrically connecting two battery cell arrays 5, held by two respective adjacent module segments, with each other. The array 5 interface board 40 here includes contact zones 41- 46, for attaching a connector arm thereto. The interconnector board 40 may optionally be connected to any of the busbars 20a, 20b, e.g. via a connector arm 4. Battery cells 1 at respective third edge sections of the arrays 5 may be connected to the interconnector board 40 by a connector arm 4. Also, the first assembly 100 and the second assembly 200 share two common busbars 204, 20b. Here, battery cells 1 at respective second edge sections of the arrays 5 may be connected to either one of the busbars 204, 20b, by a connector arm 4. Here, only one of the arrays 5, particularly the first battery cell array 5 of the first module segment 100, is connected to the controller 30.
The battery module comprises, in this example, a busbar, particularly a first busbar 20a and a second busbar 20b. The busbars 20a, 20b are arranged on opposite side of the battery cell arrays 5, and, here, extend in the longitudinal direction parallel to the rows of the battery cell array 5. Battery cells 1 at an edge of the array 5 are connected to either one of the busbars 204, 20b. The battery cells at the edge of the array 5 is electrically connected to either one of the busbars 20a, 20b by a respective one of the connector arms 4. The busbars 20a, 20b may be connected to a respective one of the positive and negative module terminal 51, 52 of the first battery module segment 100. The busbars 20a, 20b can be used to collect electric power from the battery cells 1, e.g. for powering an electric vehicle, and to collect electric power from a charger for (re)charging the battery cells. The first and second busbars 20a, 20b may be identical or mirrored to each other.
The first module segment 100 the second module segment 200 and the third module segment 300 may include respectively a first busbar segment, a second busbar segment and an intermediate busbar segment of each busbar. Each busbar may thus be manufactured in a number predetermined lengths, wherein the length here corresponds to the y- direction. The number of predetermined busbar lengths can in practice be relatively limited, since the number of interposed intermediate module segments 300 will also be limited in practice. Hence, benefits associated with large-scale production of the busbars can be substantially maintained, while flexibility as to the battery module capacity and size 1s increased. The number of predetermined busbar lengths can be based on the number of interposed intermediate module segments 300, with a minimum busbar length associated with a battery module 1000 that includes a first and second module segments 100, 200 and zero intermediate module segments 300. Each added intermediate module segment 300 adds a predetermined fixed length to the busbar.
Figure 4 shows an example of a battery module 1000, comprising a first module segment 100, a second module segment 200, and an intermediate module segment 300 interposed between the first and the second module segments 100, 200. The housing 80 of the battery module 1000 includes a top part and bottom part 81, which are couplable to each other to define a space for accommodating the battery cell arrays 5. The housing top part has been omitted in figure 4 to show some of the internal structures of the battery module 1000. The top and bottom housing parts, here, together form a substantially tubular structure that extends in the longitudinal direction, here the y-direction, of the module 1000 between to open ends. The open ends are covered by respective housing end parts 83, 84 that are comprised by the first module segment 100 and the second module segment 200 respectively. The tubular structure formed by the top and bottom housing parts has a constant transverse cross section in this example, here rectangularly shaped.
The first module segment 100, the second module segment 200 and the intermediate module segment 300 include respectively a first housing segment 81.1, a second housing segment 81.2 and an intermediate housing segment 81.3 of the housing 80. Adjoined housing segments interface one another at the interface 10. The first housing segment, here, includes a first one of the housing end parts 83 and the second housing segment includes a second one of the housing end parts 84. The first housing end part 83 and/or the second housing end part 84 provides access to a module terminal 51, 52, and/or a controller terminal 71, 72, and/or a fluid port 61, 62. Here, the first housing end part 83 provides access to the module terminals 51, 52, and the controller terminals 71, 72, and the second module segment provides access to the cooling fluid ports 61, 62, but it will be appreciated that other arrangement are also possible.
Similar to as described in view of the busbars 20a, 20b, the housing 80, here each separate housing part of the housing 80, can be manufactured in number of predetermined lengths, corresponding to the number of interposed intermediate module segments 300.
Figure 5 shows the exemplary battery module 1000 of figure 4, wherein the battery cell arrays 5 are omitted. The battery module 1000 is shown to include a cooling body 90. The cooling body 90 is arranged between the housing bottom part 81 and the battery cell arrays 5. The cooling plate
90 1s also shown in figure 6. The battery module 1000 is also shown to include a mounting structure for mounting the battery cell arrays 5. The mounting structure includes multiple fastener sites 13. The fastener sites 13 may include a fastener or may be configured for cooperating with a fastener, so as to fasten the battery cell array 5 to a respective module segment. Here, the fastener sites 13 are defined by respective tubular bodies that extend outward from the housing bottom part 81, configured for cooperating with a screw or bolt. The tubular bodies extend in this example through openings in the cooling body 90, to provide a secure connection of the battery cell arrays 5 to the housing 80.
The fastening sites 13 are arranged in rows that extend in the width direction, here the x-direction, of the battery module. In particular, each module segment 100, 200, 300 includes a first row 14a of fastener sites 13 and a second row 14b of fastener sites 13. The first and second rows 14a 14b extend parallel to each other and are arranged on either longitudinal end of the module segment 100, 200, 300. Each row 14a, 14b in this example includes four fastener sites 13, but other numbers are also possible. The fastener sites 13 in the respective first and second rows 14a, 14b of each module segment 100, 200, 300 are particularly staggered with respect to each other. Hence, for each module segment 100, 200, 300, the rows 14a, 14b are shifted with respect to each other in the width direction, such that the mounting sites 13 on either longitudinal ends of a module segment 100, 200, 300 are not longitudinally aligned. As a result, the rows of fastener sites 13 at either side of the interfaces 10.1 of each pair of adjoined module segments are also staggered with respect to each other. Sufficient clearance can accordingly be provided between the fastener sites 13 at opposite sides of the interface 10.1.
The battery module 1000 of figure 5 is also shown to include a temperature sensor that includes a temperature sensor body 9. The temperature sensor 9 is connected to the controller 30 at the first module segment 100. The temperature sensor body 9 1s arranged between the cooling body 90 and the battery cell arrays 5. The temperature sensor body 9 extends in longitudinal direction, here from the controller 30 to an opposite longitudinal end of the battery module 1000. The temperature sensor body 9 1s in this example extendable in the longitudinal direction by the addition temperature body segments. In this example the first module segment 100, the second module segment 200 and the intermediate module segment 300 include respectively a first temperature sensor body 9 segment 9.1, a second temperature sensor body segment 9.2 and an intermediate temperature sensor body segment 9.3 of the temperature sensor body 9. The temperature sensor body segments are in this example produced as separate parts, which are connected to each other in the assembly of the battery module 1000. The temperature sensor body segments interface each other at the interfaces 10.1. The intermediate temperature sensor body segment 9.3 1s in this example identical to the second temperature sensor body segment 9.2.
Figure 6 shows an example of the cooling body 90 of the battery module 1000. The cooling body 90 can be arranged between the housing bottom part 81 and the battery cell arrays 5. The cooling body 90 may alternatively form, e.g. part of, the housing bottom part 81. The cooling body 90 1s configured for cooling the battery cells of the arrays 5. The first module segment 100, the second module segment 200, and the intermediate module segment 300 comprise respectively a first cooling body segment 90.1, a second cooling body segment 90.2 and an intermediate cooling body segment 9.3 of the cooling body 90. The cooling body segments interface one another at the interfaces 10.1.
Here, the cooling body 90 includes a cooling fluid circuit 95 for a cooling fluid. The cooling fluid circuit 95 defines a fluid path for the cooling fluid between the fluid inlet port 61 and the fluid outlet 62. Each cooling body segment includes a part of the fluid circuit 95, irrespective of the number of interposed intermediate module segments 300. The fluid circuit
95 may particularly be configured such that optimal cooling is obtained, for any number of interposed intermediate module segments 300.
The fluid circuit particularly includes a looped fluid paths over the cooling body segments 90.1. The fluid circuit 95 particularly includes a first loop in which a fluid path extends from the first cooling body segment 90.1, such as from the inlet port 61, via each of the optional intermediate cooling body segments 90.3 to the second cooling body segment 90.2 and back from the second cooling body segment 90.2 via each of the optional intermediate cooling body segments 90.3 to the first cooling body segment 90.1, such as to the outlet port 62. Here, the fluid circuit 95 also includes a second loop, downstream of the first loop, in which a fluid path extends from the first cooling body segment 90.1 via each of the optional intermediate cooling body segments 90.3 to the second cooling body segment 90.2 and back from the second cooling body segment 90.2 via each of the optional intermediate cooling body segments 90.3 to the first cooling body segment 90.1, such as to the outlet port 62. The fluid path may be branching or non-branching.
Optionally, the fluid path branches, e.g. bifurcates, into at most two branches at each branching point.
Figure 7 shows a schematic example of a modular battery pack 1010, including multiple interconnected battery modules 1000. The battery pack 1010 includes, here, a pack housing 45, housing the interconnected battery modules 1000. A pack terminal 48 is provided for electrically connecting the battery pack 1010 to a load, or charger.
Herein, the invention is described with reference to specific examples of embodiments of the invention. It will, however, be evident that various modifications and changes may be made therein, without departing from the essence of the invention. For the purpose of clarity and a concise description features are described herein as part of the same or separate embodiments, however, alternative embodiments having combinations of all or some of the features described in these separate embodiments are also envisaged.
In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word ‘comprising’ does not exclude the presence of other features or steps than those listed in a claim.
Furthermore, the words ‘a’ and ‘an’ shall not be construed as limited to ‘only one’, but instead are used to mean ‘at least one’, and do not exclude a plurality. The mere fact that certain measures are recited in mutually different claims does not indicate that a combination of these measures cannot be used to an advantage.
Claims (27)
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NL2033228A NL2033228B1 (en) | 2022-10-04 | 2022-10-04 | Battery module for a modular battery pack |
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NL2033228A NL2033228B1 (en) | 2022-10-04 | 2022-10-04 | Battery module for a modular battery pack |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3223338A1 (en) * | 2016-03-25 | 2017-09-27 | Xing Mobility Inc. | Battery module |
CN108140746A (en) * | 2015-06-30 | 2018-06-08 | 法拉第未来公司 | Vehicles energy accumulating system |
WO2021074568A1 (en) * | 2019-10-18 | 2021-04-22 | Dyson Technology Limited | Battery pack |
EP3940867A1 (en) * | 2019-10-10 | 2022-01-19 | Lg Energy Solution, Ltd. | Battery pack having reinforced short-circuit prevention and shock protection structure |
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2022
- 2022-10-04 NL NL2033228A patent/NL2033228B1/en active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108140746A (en) * | 2015-06-30 | 2018-06-08 | 法拉第未来公司 | Vehicles energy accumulating system |
EP3223338A1 (en) * | 2016-03-25 | 2017-09-27 | Xing Mobility Inc. | Battery module |
EP3940867A1 (en) * | 2019-10-10 | 2022-01-19 | Lg Energy Solution, Ltd. | Battery pack having reinforced short-circuit prevention and shock protection structure |
WO2021074568A1 (en) * | 2019-10-18 | 2021-04-22 | Dyson Technology Limited | Battery pack |
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