CN105606306B - Device and method for checking the tightness of a battery cell and associated device - Google Patents
Device and method for checking the tightness of a battery cell and associated device Download PDFInfo
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- CN105606306B CN105606306B CN201510782976.3A CN201510782976A CN105606306B CN 105606306 B CN105606306 B CN 105606306B CN 201510782976 A CN201510782976 A CN 201510782976A CN 105606306 B CN105606306 B CN 105606306B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 73
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims description 22
- 230000007613 environmental effect Effects 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000007689 inspection Methods 0.000 description 4
- 239000003570 air Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000011326 mechanical measurement Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4228—Leak testing of cells or batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/44—Control modes by parameter estimation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Sustainable Development (AREA)
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- General Physics & Mathematics (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
An apparatus and method for leak testing of battery cells and related apparatus. The invention relates to a device for checking the tightness of a battery cell (10; 10'), characterized in that: a detection device for detecting (215) a first measured value of a parameter of the battery cell (10; 10 '), wherein the parameter comprises a mass, a volume, a size or a thickness of the battery cell (10; 10 ') and a second measured value for detecting (255) the parameter of the battery cell (10; 10 ') after a period of time; comparing means for comparing (265) the second measurement value with the first measurement value; and determining means for determining (270), when the second measurement differs from the first measurement by more than a predetermined threshold (265.1): the battery cell (10; 10') is not sealed or is used to determine (275) when the difference between the second measurement value and the first measurement value is less than a predetermined threshold value (265.2): a battery cell 10; 10' are sealed.
Description
Technical Field
The invention relates to an apparatus and a method for leak testing of a battery cell, and a computer program, a computer program product, a battery cell, a battery module, a battery pack system, and a vehicle.
Background
It is foreseen that new battery systems, for example with lithium-ion accumulators, are increasingly used as rechargeable Electrical Energy Stores (EES) not only in stationary applications, for example in wind power installations, but also in mobile applications, for example in Electric Vehicles (EVs), Hybrid Electric Vehicles (HEVs) or plug-in hybrid electric vehicles (PHEVs).
The battery system must meet very high requirements with regard to available energy content, charge/discharge efficiency, reliability, lifetime and tolerable capacity loss, for example, by frequent partial discharges. Therefore, high-power and high-energy battery cells are used in special embodiments and structural forms. The battery cell may, for example, comprise a prismatic casing comprising aluminum, an aluminum alloy, steel or stainless steel.
In order to achieve the full functional capacity and/or life of the battery cell, the housing hermetically encloses the air-sensitive and/or moisture-sensitive components of the battery cell in order to protect against the ambient atmosphere. The housing can comprise a predetermined breaking point for degassing the battery cells in the event of an overpressure in the event of a fault, which can be implemented, for example, as a point of thinning in the housing. The battery cells are no longer permitted to be used in the event of a leak in the housing, which can be caused by processing errors, improper handling of the battery cells and/or damage to the rated breaking point.
The battery system includes a plurality of battery cells. The battery cells may be connected in series to increase the voltage and/or in parallel to increase the maximum current. Here, the battery cells may be united as a battery cell or a battery module. In the case of being used to drive a vehicle, for example, approximately 100 battery cells (as traction battery packs) may be connected in series or in parallel. The total voltage in a high-voltage battery system may thus be 450V, for example.
Typically, the battery cells are shipped to a module manufacturer for the manufacture of the battery module after they are manufactured at the battery manufacturer. Thus, a longer period of time and/or spatial distance, for example several weeks, may lie between the manufacture of the battery cells and the manufacture of the battery module.
In order to ensure that safety requirements, reliability requirements and/or quality requirements are met, an inspection (test) is typically performed at the battery manufacturer and at the module manufacturer, an assembly of battery cells is inspected at the battery manufacturer in a cargo input test and/or at the battery manufacturer, mechanical values of the assembly, such as length, size and weight, are determined for this purpose and compared to an inspection map (Pr ü fzeichnnung).
However, in order to further improve the safety, reliability and life of the secondary battery cell (battery cell), the secondary battery module (battery module), the secondary battery (battery pack) and the secondary battery system (battery system), it is necessary to improve the tightness check (tightness check) of the battery cell.
Disclosure of Invention
The device and the method according to the invention, having the features of the independent claims, have the advantage of simplifying the tightness check of the battery cells. By means of the leak test, weight changes or weight increases, volume changes or volume increases and/or thickness changes or thickness increases due to the ingress of moisture, such as atmospheric moisture, within a period of time can be determined and evaluated without the battery cell being sealed. Here, the change of the battery cell due to the non-sealability may be distinguished from the change of the battery cell due to the change of the environmental conditions, such as the temperature fluctuation and/or the air pressure fluctuation. The tightness check can thus be performed without complex equipment and methods. Furthermore, the tightness check may be performed without damage. The sealability check may be performed in all the battery cells, so that 100% check may be achieved. Furthermore, the tightness check can be performed at the module manufacturer in the context of the cargo input check. Furthermore, the leak check may be partially or completely automated. Thus, the tightness check can be performed manually, partially automatically or fully automatically. Therefore, the safety, reliability, and life span of the battery cell and the battery module, the battery pack, and the battery system may be improved. In addition, the cost can be reduced.
Advantageous embodiments of the invention are described in the dependent claims.
Suitably, the method and/or the apparatus may further comprise or cause transmission of the first measurement value. The leak test can thus be carried out at different locations, for example at the battery manufacturer and the module manufacturer. Thereby, the battery cells may be moved between said locations during said period of time. Thus, the tightness check can be activated spatially as well as temporally.
Suitably, the method and/or the device may furthermore comprise or cause the transmission of an identification, e.g. an identification number, of the battery cell. This simplifies the allocation of the measured values. In addition, errors can be reduced or avoided.
Suitably, the method and/or the device may furthermore comprise or cause the provision of a first measurement value, wherein the provision may be made by means of an identification of the battery cell. The leak test can thus be simplified.
Suitably, the method and/or the apparatus may further comprise or cause storage of the battery cells during said period of time. The leak check can thus be integrated into a process such as battery manufacturing or module manufacturing.
Suitably, the method and/or the apparatus may further comprise or cause the transport of the battery cells during said period of time. The leak check can thus be integrated into a process chain such as battery manufacturing at the battery manufacturer and module manufacturing at the module manufacturer. The transit time can thus be utilized as a time period. In addition, costs such as storage costs can be reduced.
Suitably, the method and/or the apparatus may further comprise or cause the predetermined state of charge or the minimum state of charge of the battery cells to be adjusted during said period of time. This can improve the sensitivity of the seal check.
Suitably, the method and/or the apparatus may further comprise or cause adjustment of a predetermined ambient condition, ambient temperature, ambient pressure or ambient humidity of the battery cell during the period of time. This can further improve the sensitivity of the seal check.
Suitably, the method and/or the device may furthermore comprise or cause to detect during said time period a measured value of a further parameter, wherein the further parameter comprises for example a length of said time period, an actual voltage of the battery cell, an actual state of charge of the battery cell, an actual environmental condition of the battery cell during said time period, an ambient temperature, an ambient pressure and/or an ambient humidity. The threshold value can thus be adapted taking into account the relevant parameters. Therefore, the reliability of the sealing inspection can be further improved. It is possible to reduce the number of erroneously determined sealed battery cells. Thereby reducing waste and hence costs.
Suitably, the method and/or the device may furthermore comprise or cause a determination of a predetermined threshold value, wherein the predetermined threshold value may be implemented taking into account a measured value of the further parameter. Whereby the threshold value of each battery cell can be determined individually. Therefore, the reliability of the sealing inspection can be further improved. It is possible to further reduce the number of erroneously determined sealed battery cells. Thereby, waste and thus costs can be further reduced.
The detection of the first measured value can expediently take place after the production of the battery cells or in the output of the load and/or the detection of the second measured value can take place in the input of the load or before the production of the battery module. The tightness check can thereby be activated further in space as well as in time.
Suitably, determining that the battery cell is not sealed may comprise or cause sorting of the battery cell and/or determining that the battery cell is sealed may comprise or cause handling or encasing of the battery cell. The leak check can thus be further integrated and the process automated.
The battery cell may be configured as a prismatic battery cell or a polymer battery cell having two maximum surfaces facing each other, and the detection of the first measured value and the detection of the second measured value may be performed at the midpoint of the maximum surfaces facing each other. The tightness check can thus be carried out by means of a comparatively simple thickness measurement. The leak test can be simplified and/or automated.
It is within the scope of the invention that the method steps need not be performed in the order described. In another embodiment, the method steps can also be interleaved (Interleaving).
It is also possible that individual segments of the described method can be designed as individual saleable units and the remaining segments of the method as further saleable units. Thus, the method according to the invention may be implemented as a distributed system on different computer-based entities, e.g. client-server entities. It is thus possible, for example, for a module to comprise different submodules in respect thereof.
The invention furthermore provides a computer program which is stored on a data carrier or in a memory of a computer and comprises instructions which can be read by the computer and which, when implemented on the computer, are determined for carrying out one of the methods described above.
The invention furthermore provides a computer program product comprising the computer program as described before.
The invention furthermore provides a battery cell which has been subjected to the previously described device and/or the previously described method.
The present invention further provides a battery module comprising the battery cell as described before.
The invention furthermore provides a battery pack comprising a battery cell as described before or a battery module as described before.
The invention furthermore provides a battery system comprising a battery cell as described before, a battery module as described before or a battery as described before.
The invention furthermore provides a vehicle, in particular a motor vehicle such as an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle or an electric motorcycle (Elektro-Bike, E-Bike), an electric bicycle (Pedelec), a ship such as an electric boat or a submarine (U-Boot), an aircraft or a spacecraft, comprising a battery cell as described above and connected to the vehicle, a battery module as described above and connected to the vehicle, a battery pack as described above and connected to the vehicle or a battery pack system as described above and connected to the vehicle.
Drawings
Further features and advantages of the invention will become apparent to those skilled in the art from the following description of exemplary embodiments with reference to the accompanying drawings, which, however, should not be construed as limiting the invention.
Fig 1 shows a schematic view of a battery cell 10 according to an embodiment of the invention in the case of a first measurement for a tightness check,
fig. 2 shows a schematic illustration of a battery cell 10' according to an embodiment of the invention with a second measurement for a tightness check, an
Fig. 3 shows a battery cell 10 according to another embodiment of the present invention; 10' method 20 of leak-tightness checking.
Detailed Description
Fig. 1 shows a schematic illustration of a battery cell 10 according to an embodiment of the invention in the case of a first measurement for a tightness check.
As is shown by way of example in fig. 1, the battery cell 10 can be embodied as a prismatic battery cell and comprises a battery cell having a battery connection terminal (cell terminal, terminal) 1151、1152Battery pack cover 1101And has a battery pack case bottom (case bottom) 1102Two housing side walls (side walls) 120 opposite to each other1、1202And two housing end faces (end walls) 130 opposed to each other1、1302The battery pack case of (1). Battery pack cover 1101Battery pack connection terminal 1151、1152And/or the battery housing may comprise a metal, such as aluminum, an aluminum alloy, steel, or stainless steel. Battery pack cover 1101Battery pack connectionTerminal 1151、1152And/or the transition between the battery housings must be constructed hermetically, e.g., hermetically, such as air-tightly or liquid-tightly, so that the battery cell 10 is hermetically closed and thus its interior is protected from the surrounding environment caused by ambient air, e.g., moisture, such as atmospheric moisture, and/or harmful substances.
As shown in FIG. 1, side 1201、1202Can be combined with the housing cover 1101Housing bottom 1102And end face 1301、1302Compared with the largest area. At the side 1201、1202The intersection of the two upper diagonal lines defines the side 1201、1202The midpoint 125 of. The spacing of the midpoints 125 determines a thickness value of the battery cell 10.
Alternatively, the battery cell 10 can be designed, for example, as a hard-shell cell (nutshell cell) having two housing shells, the base surface of the housing shells having the largest surface area in comparison to the cover surface of the housing shells (Mantelfl ä chen).
The battery cell 10 may comprise an identification means 140 for unambiguously identifying the battery cell. The identification means 140 may comprise an identification number. The identification number may be implemented as a code, e.g. a machine readable code such as a bar code.
Fig. 1 shows a battery cell 10 in the case of a first measurement for a tightness check of the battery cell 10. The first measurement includes a first detection of a first mechanical measurement, such as a gravity and/or volume measurement, of the battery cell 10. The gravity measurement may include, for example, a weight measurement or a mass measurement of the battery cell 10. The volume measurement may comprise, for example, a measurement of the extension or volume of the battery cell 10, such as a measurement of the width or thickness (thickness measurement), a measurement of the length and/or a measurement of the height. The first measurement may further include a first detection of a first electrical measurement of the battery cell 10, such as a charge of state (SoC) measurement, a voltage measurement, a current measurement, a resistance measurement.
The first measurement may be performed, for example, after the manufacture of the battery cell 10, before the storage of the manufactured battery cell 10 or before the transportation of the manufactured or stored battery cell 10, such as rail transportation, air transportation, sea transportation or road transportation. The first measurement can be carried out, for example, at the manufacturer of the battery cell (battery cell manufacturer, battery manufacturer) in a manufacturing or production facility of the battery cell or in the output of goods.
Fig. 2 shows a schematic illustration of a battery cell 10' according to an embodiment of the invention in the case of a second measurement for a tightness check.
The battery cell 10' shown in fig. 2 is the battery cell 10 shown in fig. 1 after a period of time (period of time, interval of time).
If the battery cell 10' is not sealed, the battery cell may absorb and store atmospheric moisture from the ambient air during this period of time. Thereby, the mass and/or volume of the battery cell 10' may be increased. Therefore, as illustrated in fig. 2, the values of the interval and thickness of the middle point 125 'of the battery cell 10' are increased. Battery cell 10' extension, in particular side 1201、1202Where it bulges or bulges outward.
Fig. 2 shows the battery cell 10 'in the case of a second measurement for a tightness check of the battery cell 10'. As described with reference to fig. 1, the second measurement comprises a second detection of a second mechanical measurement of the battery cell 10'. The second measurement may furthermore comprise a second detection of a second electrical measurement value of the battery cell 10'.
The second measurement may be performed, for example, after storing the manufactured battery cell 10', after transporting the manufactured or stored battery cell 10', or before manufacturing a battery module comprising the battery cell 10 '. The second measurement can be carried out, for example, at the manufacturer of the battery module (battery module manufacturer, module manufacturer) in a goods input or at a manufacturing or production facility of the battery module.
The comparison of the second mechanical and/or electrical measurement with the first mechanical and/or electrical measurement allows for the battery cell 10; extrapolation of the seal of 10'. If the battery cell 10; 10' has increased in mass and/or volume after the period of time, if necessary under consideration, the battery cell 10; 10' are not suitable for further use, for example in a battery module.
For the battery cell 10; 10 'comprises a first measuring device and, if appropriate, a second measuring device for a first detection of a first mechanical measured value of the battery cell 10 and for a second detection of a second mechanical measured value of the battery cell 10' after a period of time; and a processing device, which may be configured, for example, as a processor, microprocessor or microcontroller, for the program-controlled processing of the measured values, determination and comparison of the battery cells 10; a mass and/or volume value of 10'; a memory device which is connected to the processing device and which can be designed, for example, as a memory, such as a non-volatile memory and/or a volatile memory, for storing instructions and/or data, such as identification numbers, measured values, threshold values and/or adjustment values; and a connection device which is connected to the processing device and can be designed, for example, as an interface for transmitting data, such as identification numbers and measured values. The device may be integrated in a manufacturing device of a battery cell or a battery module. The apparatus may be implemented by a production planning and control system (PPS). Alternatively, the apparatus may be implemented by a remote or distributed computer or computer, such as a central server. The data can be transmitted via the internet or wirelessly, for example.
The operation of the device is described in detail below with reference to fig. 3.
Fig. 3 shows a battery cell 10 according to another embodiment of the present invention; 10' method 20 of leak-tightness checking.
The method 20, which may be implemented, for example, in the device and/or as a computer-implemented method, may be implemented in a first stage and a second stage as is shown by way of example in fig. 3.
The first stage of method 20 begins with step 210. In step 210, instructions stored in the storage device are transmitted, for example, to the processing device.
Detecting the battery cell 10 in step 215; 10' of a parameter. The parameters may include the battery cell 10; 10' mass, volume, size and/or thickness. Step 215 may be, for example, in manufacturing the battery cell 10; 10' or in the cargo export. If the battery cell 10; 10' is configured to have two maximum faces 120 opposite each other1、1202Of a prismatic battery cell or a polymer cell, the first measurement value may be on the maximum plane (120)1、1202) Opposite to each other, midpoint 125; 125' is detected.
The first measurement may be sent in step 220 for transmission to the second stage. The first measured value may be stored, e.g. temporarily stored.
The battery cell 10 may be transmitted in step 225; 10' to connect the battery cell 10; the identification of 10' is transmitted to the second stage. The battery cells 10 may be stored, e.g., temporarily stored; 10'. A battery cell 10; 10' may be transmitted and/or stored or temporarily stored as a data pair or as a data set in a table for a plurality of battery cells.
The first stage ends with step 230.
The battery cell 10 during a period of time; 10' may be stored and/or transported, for example. The length of the time period may lie, for example, in the range of hours, days, weeks or months. Here, the battery cell 10 may be adjusted during the period of time; 10' and/or a minimum state of charge. Further, the battery cells 10 may be adjusted during a period of time; 10', such as ambient temperature, ambient pressure and/or ambient humidity. Alternatively or additionally, measured values of further parameters may be detected during the time period, for example the length of the time period, the battery cell 10; 10', the actual voltage of the battery cell 10; 10', actual state of charge of the battery cell 10; 10', such as ambient temperature, ambient pressure and/or ambient humidity.
The second stage of method 20 begins with step 235. In step 235, the instructions stored in the storage device are transmitted to the processing device, for example.
The transmitted first measurement value may be received in step 240.
Receiving the battery cell 10 in step 245; 10' transmitted identification.
A first measurement may be provided in step 250. The first measurement value may be determined by means of the battery cell 10; 10' is provided.
Detecting the battery cell 10 after the period of time in step 255; 10' of the parameter. Step 255 may be performed, for example, in the shipment or prior to manufacturing the battery module. If the battery cell 10; 10' is configured to have two maximum faces 120 opposite each other1、1202Of the battery cell or the polymer cell, the second measured value again being on the maximum surface (120)1、1202) Are detected at the midpoint 125 relative to each other.
A threshold value may be determined in step 260. In this case, the threshold value can be determined taking into account the measured values of the further parameters.
The second measurement is compared to the first measurement in step 265. If the second measurement differs from the first measurement by more than a predetermined threshold 265.1, then in step 270 it is determined that: a battery cell 10; 10' is unsealed or "bad". Furthermore, in step 270, the operation of the battery cells 10; 10' sorting. If the second measurement differs from the first measurement by less than the predetermined threshold 265.2, then in step 275 it is determined that: a battery cell 10; 10' is sealed or "good". Furthermore, in step 275, the battery cell 10; 10' for example, to the handling or installation in a battery module.
The second stage ends with step 280.
For a plurality of battery cells 10; 10' the method can be carried out repeatedly.
Finally, the following description is provided: expressions such as "comprising" and "having" etc do not exclude that further elements or steps may be present. The numbers used are merely exemplary, such that two, four, five, six or more elements or steps may be included. It is further noted that articles such as "a" or "an" do not exclude a plurality. Further, it is stated that: numbers or ordinal numbers such as "first", "second", etc. are used only to distinguish between elements and steps, and do not specify or limit the order of arrangement of the elements or the order of implementation of the steps herein. Furthermore, the features described in connection with the different embodiments may be combined with each other as desired. Finally, the following description is provided: reference signs in the claims shall not be construed as limiting their scope.
Claims (14)
1. Device for leak-tightness checking of battery cells (10; 10'), characterized in that:
-detection means for detecting a first measured value of a parameter of the battery cell (10; 10 '), wherein the parameter comprises a mass, a volume, a size or a thickness of the battery cell (10; 10 '), and for detecting a second measured value of the parameter of the battery cell (10; 10 ') after a period of time;
-comparing means for comparing the second measurement value with the first measurement value; and
-determining means for determining, when the second measurement value differs from the first measurement value by more than a predetermined threshold: the battery cell (10; 10') is not sealed or is used to determine, when the difference between the second measurement value and the first measurement value is less than the predetermined threshold value: the battery cell (10; 10') is sealed,
the apparatus further causes:
-detecting a measured value of a further parameter during said time period, wherein said further parameter comprises a length of said time period, an actual voltage of said battery cell (10; 10 '), an actual state of charge of said battery cell (10; 10 '), an actual ambient condition of said battery cell (10; 10 ') during said time period, an ambient temperature, an ambient pressure or an ambient humidity; and
-determining (260) the predetermined threshold, wherein the predetermined threshold can be achieved taking into account the measured value of the further parameter.
2. The apparatus of claim 1, further comprising:
-transmission means for transmitting said first measurement value and for transmitting an identification of said battery cell (10; 10');
-providing means for providing said first measurement value, wherein said providing can be performed by means of said identification;
-storage means for storing the battery cells (10; 10') during said period of time;
-transporting means for transporting the battery cells (10; 10') during said time period;
-adjusting means for adjusting a predetermined state of charge or a minimum state of charge of the battery cell (10; 10 ') during said time period or for adjusting a predetermined environmental condition, an environmental temperature, an environmental pressure or an environmental humidity of the battery cell (10; 10') during said time period.
3. The apparatus of claim 1 or 2, wherein:
-said detection means detecting said first measurement value after manufacture of said battery cell (10; 10') or in the output of a cargo;
-the detection device detects the second measurement value in the cargo input or before manufacturing the battery module;
-said determining means performing or causing a sorting of said battery cells (10, 10 ') in case it is determined that said battery cells (10; 10') are not sealed;
-said determination means carrying out or causing the handling or the fitting of said battery cell (10; 10 ') in case it is determined that said battery cell (10; 10') is sealed.
4. The apparatus of claim 1 or 2, wherein:
-the battery cell (10; 10') is configured with two largest faces (120) opposite to each other1、1202) And the detection device is on the maximum side (120)1、1202) Are opposite to each other's midpoint (125)1) The first measurement value and the second measurement value are detected.
5. Method (20) for leak-tightness checking of battery cells (10; 10'), characterized in that:
-detecting a first measured value of a parameter of the battery cell (10; 10 '), wherein the parameter comprises the mass, volume, size or thickness of the battery cell (10; 10');
-detecting a second measured value of said parameter of said battery cell (10; 10') after a period of time;
-comparing the second measurement value with the first measurement value; and
-if the second measurement value differs from the first measurement value by more than a predetermined threshold value, determining: the battery cell (10; 10') is not sealed; or
-if the difference between the second measurement value and the first measurement value is smaller than the predetermined threshold, determining: the battery cell (10; 10') is sealed,
-detecting a measured value of a further parameter during said time period, wherein said further parameter comprises a length of said time period, an actual voltage of said battery cell (10; 10 '), an actual state of charge of said battery cell (10; 10 '), an actual ambient condition of said battery cell (10; 10 ') during said time period, an ambient temperature, an ambient pressure or an ambient humidity; and
-determining (260) the predetermined threshold, wherein the predetermined threshold can be achieved taking into account the measured value of the further parameter.
6. The method (20) of claim 5, further comprising:
-transmitting said first measurement value;
-transmitting an identification of the battery cell (10; 10');
-providing said first measurement value, wherein said providing can be done by means of said identification;
-storing the battery cells (10; 10') during said period of time;
-transporting the battery cells (10; 10') during said period of time;
-adjusting a predetermined state of charge or a minimum state of charge of the battery cells (10; 10') during the period of time;
-adjusting a predetermined environmental condition, an environmental temperature, an environmental pressure or an environmental humidity of the battery cell (10; 10') during the period of time.
7. The method (20) of claim 5 or 6, wherein:
-the detection of the first measurement value is performed after the manufacturing of the battery cell (10; 10') or in the output of goods;
the detection of the second measured value is carried out in the cargo input or before the battery module is manufactured;
-determining whether the battery cell (10; 10 ') is unsealed or causing a sorting of the battery cells (10; 10');
-determining that the battery cell (10; 10 ') is sealed or facilitating handling or installation of the battery cell (10; 10').
8. The method (20) of claim 5 or 6, wherein:
-the battery cell (10; 10') is configured with two largest faces (120) opposite to each other1、1202) And the detection of the first measured value and the detection of the second measured value are on the maximum side (120)1、1202) Are opposite to each other's midpoint (125)1) And (4) performing the step (A).
9. Computer-readable medium having stored thereon a computer program comprising instructions readable by a computer, which instructions, when implemented on the computer, are determined for implementing a method according to one of claims 5 to 8.
10. Battery cell (10; 10'), characterized in that the battery cell has been subjected to a device according to one of claims 1 to 4 and a method according to one of claims 5 to 8.
11. A battery module comprising:
-a battery cell (10; 10') according to claim 10.
12. A battery pack, comprising:
-a battery cell (10; 10') according to claim 10, or
-a battery module according to claim 11.
13. A battery pack system, comprising:
-a battery cell (10; 10') according to claim 10, or
-the battery module according to claim 11, or
-a battery pack according to claim 12.
14. A vehicle, comprising:
-a battery cell (10; 10') according to claim 10, connected with the vehicle, or
-a battery module according to claim 11, connected with the vehicle, or
-the battery according to claim 12, connected to the vehicle, or
-a battery system according to claim 13, connected with the vehicle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014223359.3 | 2014-11-17 | ||
| DE102014223359.3A DE102014223359A1 (en) | 2014-11-17 | 2014-11-17 | Apparatus and method for leak testing a battery cell and computer program, computer program product, battery cell, battery module, battery, battery system and vehicle |
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| CN105606306A CN105606306A (en) | 2016-05-25 |
| CN105606306B true CN105606306B (en) | 2020-04-10 |
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| CN201510782976.3A Active CN105606306B (en) | 2014-11-17 | 2015-11-16 | Device and method for checking the tightness of a battery cell and associated device |
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| CN106370550A (en) * | 2016-08-17 | 2017-02-01 | 广东小天才科技有限公司 | Waterproof test method and system and user equipment |
| DE102016117441A1 (en) | 2016-09-16 | 2018-03-22 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Traction battery and vehicle with such |
| DE102018219370B3 (en) | 2018-11-13 | 2019-10-24 | Robert Bosch Gmbh | Method for detecting a water ingress in a housing, electronic circuit for carrying out the method, housing with the electronic circuit and vehicle with the housing |
| DE102021127865B3 (en) | 2021-10-26 | 2022-11-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for leak testing a high-voltage battery for an at least partially electrically powered motor vehicle |
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| CN2831153Y (en) * | 2005-10-26 | 2006-10-25 | 广东省电子技术研究所 | Battery tester |
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| DE102012207999A1 (en) * | 2012-05-14 | 2013-11-14 | Robert Bosch Gmbh | Sheath foil for a galvanic cell, electrochemical storage, electrochemical storage system, flexible foil for a sheath of a galvanic cell and method for determining a state quantity of an electrochemical storage |
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| JPH07312225A (en) * | 1994-05-17 | 1995-11-28 | Matsushita Electric Ind Co Ltd | Sealed lead-acid battery |
| CN2831153Y (en) * | 2005-10-26 | 2006-10-25 | 广东省电子技术研究所 | Battery tester |
| CN102269800A (en) * | 2010-05-07 | 2011-12-07 | Pct国际股份有限公司 | Battery testing method |
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| DE102014223359A1 (en) | 2016-05-19 |
| CN105606306A (en) | 2016-05-25 |
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