DE102014223359A1 - Apparatus and method for leak testing a battery cell and computer program, computer program product, battery cell, battery module, battery, battery system and vehicle - Google Patents

Abstract

The present invention relates to a device for leak testing a battery cell (10, 10 '), characterized by a detection device for detecting (215) a first measured value of a parameter of the battery cell (10, 10'), wherein the parameter is a mass, a volume, a Dimension or thickness of the battery cell (10, 10 ') and, after a period of time, detecting (255) a second measured value of the parameter of the battery cell (10, 10'); a comparison device for comparing (265) the second measured value with the first measured value; and determining means for, when the second measurement and the first measurement differ by more than a predetermined threshold (265.1), determining (270) that the battery cell (10; 10 ') is leaking, or when the second measurement and the first measurement differ by less than the predetermined threshold (265.2), determining (275) that the battery cell (10; 10 ') is leakproof, a method, a computer program, a computer program product, a battery cell (10; 10'), a battery module, a battery, a battery system and a vehicle.

Description

State of the art

It is foreseeable that both in stationary applications, for example in wind turbines, and in mobile applications, for example in electric vehicles (EV), hybrid electric vehicles (HEV) or plug-in hybrid electric vehicles, PHEV), as rechargeable electrical energy storage systems (EES, electrochemical storage system, ESS) increasingly new battery systems, for example with lithium-ion batteries, will be used.

The battery systems must meet very high requirements in terms of usable energy content, charge / discharge efficiency, reliability, life and tolerable capacity loss, for example, by frequent partial discharge. Thus, high performance and high energy battery cells are used in special designs and designs. For example, the battery cells may comprise a prismatic housing comprising aluminum, an aluminum alloy, steel or stainless steel.

To achieve full functionality and / or life of a battery cell, the housing encloses the components of the battery cell that are sensitive to air and / or moisture, hermetically sealed for protection from the ambient atmosphere. The housing may include a predetermined breaking point, which may be embodied, for example, as a thinned point in the housing, for degassing the battery cell in the event of an excessive overpressure in the event of a fault. In case of a leakage of the housing, which may be caused for example by a manufacturing defect, improper handling of the battery cell and / or damage to the predetermined breaking point, the battery cell may not be used.

A battery system includes a plurality of battery cells. The battery cells can be connected in series (series) to increase the voltage and / or connected in parallel to increase the maximum electric current. In this case, the battery cells can be combined to form battery units or battery modules. When used to drive vehicles, for example, about 100 battery cells (as a traction battery) can be connected in series or in parallel. For example, in a high voltage battery system, the total voltage may be 450V.

Typically, once manufactured, the battery cells are transported to a cell manufacturer for manufacturing battery modules to a module manufacturer. Thus, longer periods of time may be, for example, weeks and / or spatial distances between the manufacture of the battery cells and the manufacture of the battery modules.

In order to ensure compliance with safety requirements, reliability requirements and / or quality requirements, tests (tests) are usually carried out at the cell manufacturer and the module manufacturer. At the cell manufacturer, components of the battery cells are checked during incoming goods tests and / or during cell production. For example, mechanical values such as length, dimensions or weight of a component are determined and compared with a test drawing. In addition, 100% product output tests are performed at the cell manufacturer prior to shipment. In this case, voltage values and internal resistance values of the battery cells are usually determined and transmitted to the module manufacturer. After transport, the module manufacturer performs 100% goods receipt tests. In turn, voltage values and internal resistance values of the battery cells are determined and compared with the transmitted voltage values and internal resistance values. In addition, the battery cells can be checked visually for visible mechanical damage and / or contamination. Furthermore, dimensions of a battery cell can be determined and compared with the test drawing.

However, in order to further increase the safety, reliability and life of battery cells, battery modules, accumulators (batteries) and battery systems, it is necessary to improve the leakage test of battery cells.

Disclosure of the invention

The devices and methods according to the invention with the features of the independent claims have the advantage that the leak test of a battery cell is simplified. By the tightness test, a weight change or increase in weight, volume change or increase in volume and / or thickness change or increase in thickness due to penetration of moisture such as humidity over the period of leakage of the battery cell can be determined and evaluated. In this case, changes in the battery cell due to a leak of changes in the battery cell due to changes in environmental conditions such as temperature fluctuations and / or changes in air pressure can be distinguished. Thus, the leak test without consuming Devices and methods are performed. Furthermore, the leak test can be carried out non-destructive. Thus, the leak test can be performed on all battery cells, so that a 100% test can be achieved. Furthermore, the leak test can be carried out as part of a goods receipt inspection at the module manufacturer. In addition, the leak test can be partially or completely automated. Thus, the leak test can be performed manually, semi-automatically or fully automatically. This can increase the safety, reliability and service life of the battery cells as well as battery modules, batteries and battery systems. Furthermore, costs can be reduced.

Advantageous embodiments of the present invention are described in the dependent claims.

Conveniently, the method and / or the device may further include transmitting the first measurement value. As a result, the tightness test can be carried out distributed to different locations, for example cell manufacturers and module manufacturers. This allows the battery cell to be moved between locations during the period of time. Thus, the leak test can be made more flexible spatially and temporally.

Expediently, the method and / or the device can furthermore include or initiate the transmission of an identification, for example the identification number of the battery cell. As a result, the assignment of the measured values can be simplified. In addition, errors can be reduced or avoided.

Expediently, the method and / or the device can furthermore comprise or initiate provision of the first measured value, wherein the provision can take place by means of the identification of the battery cell. As a result, the tightness test can be simplified.

Conveniently, the method and / or apparatus may further include storing the battery cell during the period of time. This allows the tightness test to be integrated into processes such as cell production or module manufacturing.

Conveniently, the method and / or apparatus may further include transporting the battery cell during the period of time. As a result, leak testing can be integrated into process chains such as cell production at cell manufacturers and module production at module manufacturers. Thus, a transport time can be used as a period of time. Furthermore, costs such as storage costs can be reduced.

Conveniently, the method and / or apparatus may further include setting a predetermined state of charge or minimum state of charge of the battery cell during the period of time. As a result, the sensitivity of the leak test can be increased.

Conveniently, the method and / or apparatus may further include setting a predetermined ambient condition, ambient temperature, ambient pressure, or ambient humidity for the battery cell during the period of time. As a result, the sensitivity of the leak test can be further increased.

Conveniently, the method and / or apparatus may further include sensing measurements of other parameters during the time period, the further parameters being, for example, a length of time, an actual voltage of the battery cell, an actual state of charge of the battery cell, an actual environmental condition , Ambient temperature, ambient pressure and / or ambient humidity for the battery cell during the period of time. This allows the threshold value to be adjusted taking into account relevant parameters. Thus, the reliability of the leak test can be further increased. Thus, the number of misjudged dense battery cells can be reduced. This can reduce scrap and thus costs.

Conveniently, the method and / or the apparatus may further comprise determining the predetermined threshold value, wherein the predetermined threshold value may take place taking into account the measured values for the further parameters. Thereby, the threshold value can be determined individually for each battery cell. Thus, the reliability of the leak test can be further increased. Thus, the number of misjudged dense battery cells can be further reduced. This can further reduce scrap and thus costs.

Appropriately, the detection of the first measured value can take place after production of the battery cell or in a goods issue and / or the acquisition of the second measured value can take place in a goods receipt or before production of a battery module. As a result, the tightness test can be made more flexible spatially and temporally.

Conveniently, determining that the battery cell is leaking may include or cause a sorting out of the battery cell, and / or determining that the battery cell is leaking may include or cause processing or installation of the battery cell. As a result, the leak test can be further integrated and the processes automated.

Conveniently, the battery cell can be formed as a prismatic battery cell or polymer cell with two opposite largest surfaces and the detection of the first measured value and the detection of the second measured value take place at opposite centers of the largest surfaces. As a result, the tightness test can be carried out by means of a comparatively simple thickness measurement. The tightness test can be simplified and / or automated.

It is within the scope of the invention not necessarily to carry out the method steps in the order described. In a further embodiment, the method steps can also be interleaved (interleaving).

Furthermore, it is possible that individual sections of the described method can be designed as individual salable units and remaining sections of the method as other salable units. Thus, the method according to the invention can be executed as a distributed system on different computer-based instances, for example client-server instances. For example, it is possible for a module to include different sub-modules.

The invention further provides a computer program stored on a data carrier or in a memory of a computer and comprising computer readable instructions for executing one of the methods described above when the instructions are executed on the computer.

The invention further provides a computer program product comprising the computer program described above.

The invention further provides a battery cell that has undergone the previously described apparatus and / or the previously described method.

The invention further provides a battery module comprising the previously described battery cell.

The invention further provides a battery comprising the previously described battery cell or battery module described above.

The invention further provides a battery system comprising the above-described battery cell, the above-described battery module or the previously described battery.

The invention further provides a vehicle, in particular motor vehicle such as electric motor vehicle, hybrid vehicle, plug-in hybrid vehicle or electric motorcycle (electric bike, e-bike), electric bicycle (Pedal Electric Cycle, Pedelec), a maritime vehicle such as electric boat or submarine (submarine) , an aircraft or a spacecraft, including the battery cell previously described and connected to the vehicle, the battery module previously described and connected to the vehicle, the battery previously described and connected to the vehicle, or the battery system previously described and connected to the vehicle ,

Other features and advantages of the present invention will become apparent to those skilled in the art from the following description of exemplary embodiments, which should not be construed as limiting the invention, with reference to the accompanying drawings.

1 shows a schematic view of a battery cell 10 in a first measurement for leak testing according to an embodiment of the invention,

2 shows a schematic view of the battery cell 10 ' in a second measurement for leak testing according to an embodiment of the invention, and

3 shows a schematic view of a method 20 for leak testing of a battery cell 10 ; 10 ' according to another embodiment of the invention.

1 shows a schematic view of a battery cell 10 in a first measurement for leak testing according to an embodiment of the invention.

The battery cell 10 can, as in 1 shown as an example, be designed as a prismatic battery cell and a battery cover 110 ₁ with battery connections (cell terminals, terminals) 115 ₁ , 115 ₂ and a battery case with a battery case bottom (case bottom) 110 ₂ , two opposite housing side walls (side walls) 120 ₁ , 120 ₂ and two opposite housing end faces (end walls) 130 ₁ , 130 ₂ include. The battery cover 110 ₁ , the battery terminals 115 ₁ , 115 ₂ and / or the battery case may include metal such as aluminum, an aluminum alloy, steel or stainless steel. Transitions between the battery cover 110 ₁ and the battery connections 115 ₁ , 115 ₂ and / or the battery case must be dense example, hermetically sealed as gas-tight or liquid-tight, so that the battery cell 10 tightly sealed and thus its interior is protected from environmental influences by ambient air, for example moisture such as humidity and / or pollutants.

The side surfaces 120 ₁ , 120 ₂ can, as in 1 shown, compared to the housing cover 110 ₁ , the housing bottom 110 ₂ and the faces 130 ₁ , 130 ₂ , have the largest surface area. On the side surfaces 120 ₁ , 120 ₂ each determines an intersection of two diagonal centers 125 _{1 of} the side surfaces 120 ₁ , 120 ₂ . A distance of the centers 125 ₁ determines a thickness value of the battery cell 10 ,

Alternatively, the battery cell 10 For example, be configured as Nutschellenzelle (nutshell cell) with two housing shells. In this case, base surfaces of the housing shells, in comparison to lateral surfaces of the housing shells, have the largest surface area. On the base surfaces, an intersection of two diagonals can determine a midpoint of the base surfaces.

The battery cell 10 can be an identification means 140 for unambiguous identification of the battery cell 10 include. The means of identification 140 may include an identification number. The identification number can be embodied as a code, for example, machine-readable code such as barcode.

1 shows the battery cell 10 at the first measurement for leak testing of the battery cell 10 , The first measurement comprises a first acquisition of first mechanical measured values, such as gravimetric and / or volumetric measured values of the battery cell 10 , The gravimetric measured values can be, for example, weight measured values or mass readings of the battery cell 10 include. The volumetric measured values can be, for example, distance measured values, such as width measured values or measured values of the thickness value (thickness measured values), length measured values and / or height measured values of the battery cell 10 or volume readings. The first measurement may further include first acquiring first electrical measurements such as state of charge (SoC) measurements, voltage measurements, current readings, resistance measurements of the battery cell 10 include.

The first measurement may be, for example, after production of the battery cell 10 , before storage of the manufactured battery cell 10 or before a transport such as rail transport, air transport, maritime transport or road transport of the manufactured or stored battery cell 10 respectively. The first measurement can be carried out, for example, at a manufacturer of battery cells (battery cell manufacturer, cell manufacturer), in a manufacturing plant or production plant for battery cells or in a goods issue.

2 shows a schematic view of the battery cell 10 ' in a second leak test according to an embodiment of the invention.

In the 2 shown battery cell 10 ' is the in 1 shown battery cell 10 after a period of time (period, time interval).

When the battery cell 10 ' If it is leaking, it can absorb and store atmospheric moisture during the time period from the ambient air. As a result, a mass and / or a volume of the battery cell 10 ' increase. Thus, as in 2 illustrates the distance between the centers 125 ₁ 'and the thickness value of the battery cell 10 ' increase. The battery cell 10 ' expands, in particular, the side surfaces bulge or camber 120 ₁ , 120 ₂ to the outside.

2 shows the battery cell 10 ' in the second measurement for leak testing of the battery cell 10 ' , As with respect to 1 described, the second measurement comprises a second detection of second mechanical measurements of the battery cell 10 ' , The second measurement can furthermore be a second detection of second electrical measured values of the battery cell 10 ' include.

The second measurement may be, for example, after storage of the manufactured battery cell 10 ' after transport of the manufactured or stored battery cell 10 ' or prior to making a battery module containing the battery cell 10 ' includes. The second measurement may, for example, be carried out by a manufacturer of battery modules (battery module manufacturer, module manufacturer), in a goods receipt or in a production facility or production facility for battery modules.

A comparison of the second mechanical measured values and / or second electrical measured values with the first mechanical measured values and / or first electrical measured values allows conclusions to be drawn about the tightness of the battery cell 10 ; 10 ' , If a mass and / or a volume of the battery cell 10 ; 10 ' after the time period has increased, if necessary taking into account, the battery cell is 10 ; 10 ' and unsuitable for further use in, for example, a battery module.

A device for leak testing the battery cell 10 ; 10 ' comprises a first measuring device and possibly a second measuring device for first detecting the first mechanical measured values of the battery cell 10 and for second detecting the second mechanical measurements of the battery cell 10 ' after a period of time and a processing device which can be designed, for example, as a processor, microprocessor or microcontroller for program-controlled processing of the measured values, determining and comparing mass values and / or volume values of the battery cell 10 ; 10 ' a memory device which is connected to the processing device and may be embodied, for example, as memory such as non-volatile memory and / or volatile memory for storing commands and / or data such as identification numbers, measured values, threshold values and / or control values, and a connection device which is connected to the processing device and may be formed, for example, as an interface for transmitting data such as identification numbers and measured values. The device may be integrated in a manufacturing plant for battery cells or battery modules. The device can be realized by a production planning and control system (PPS). Alternatively, the device can be realized by a remote or distributed computer or computer, for example, a central server. The data can be transmitted, for example, over the Internet or wirelessly.

The operation of the device will be described below with reference to FIGS 3 described in detail.

3 shows a schematic view of a method 20 for leak testing of a battery cell 10 ; 10 ' according to another embodiment of the invention.

The procedure 20 , which can be carried out, for example, in the device and / or as a computer-implemented method can, as in 3 shown by way of example in a first stage and a second stage.

The first stage of the process 200 starts with step 210 , In step 210 For example, commands stored in the storage device are transferred to the processing device.

In step 215 becomes a first measured value of a parameter of the battery cell 10 ; 10 ' detected. The parameter may be a mass, a volume, a dimension and / or a thickness of the battery cell 10 ; 10 ' include. The step 215 For example, after production of the battery cell 10 ; 10 ' or in a goods issue. When the battery cell 10 ; 10 ' as a prismatic battery cell or polymer cell with two opposite largest surfaces 120 ₁ , 120 ₂ , the first measured value may be at opposing center points 125 _{1 of} the largest areas ( 120 ₁ , 120 ₂ ).

In step 220 For example, the first measurement may be sent to the second stage to transmit the first measurement. The first measured value can be stored, for example, temporarily stored.

In step 225 can be an identification of the battery cell 10 ; 10 ' for transmitting the identification of the battery cell 10 ; 10 ' be sent to the second stage. The identification of the battery cell 10 ; 10 ' can be stored stored, for example. The first measured value and the identification of the battery cell 10 ; 10 ' can be transmitted as a data pair or, in a table for a plurality of battery cells, as a data set and / or stored or cached.

The first stage ends with step 230 ,

During a period of time, the battery cell can 10 ; 10 ' for example, stored and / or transported. The length of the time period may be in the range of hours, days, weeks or months, for example. In this case, during the time period, a predetermined state of charge and / or minimum state of charge of the battery cell 10 ; 10 ' be set. Furthermore, during the time period, a predetermined environmental condition such as ambient temperature, ambient pressure and / or ambient humidity for the battery cell 10 ; 10 ' be set. Alternatively or additionally, during the time period measured values of further parameters, for example, a length of the time segment, an actual voltage of the battery cell 10 ; 10 ' , an actual state of charge of the battery cell 10 ; 10 ' , an actual environmental condition such as ambient temperature, ambient pressure and / or ambient humidity for the battery cell 10 ; 10 ' be recorded.

The second stage of the process 200 starts with step 235 , In step 235 For example, commands stored in the storage device are transferred to the processing device.

In step 240 the transmitted first measured value can be received.

In step 245 can the transmitted identification of the battery cell 10 ; 10 ' be received.

In step 250 the first measured value can be provided. The first measured value can be determined by means of the identification of the battery cell 10 ; 10 ' to be provided.

In step 255 is, after the period, a second measured value of the parameter of the battery cell 10 ; 10 ' detected. The step 255 can be done for example in a goods receipt or before producing a battery module. When the battery cell 10 ; 10 ' as a prismatic battery cell or polymer cell with two opposite largest surfaces 120 ₁ , 120 ₂ , the second measured value can in turn be at the opposing center points 125 _{1 of} the largest areas ( 120 ₁ , 120 ₂ ).

In step 260 a threshold can be determined. The threshold value can be determined taking into account the measured values for the other parameters.

In step 265 the second measured value is compared with the first measured value. If the second measured value and the first measured value differ by more than the predetermined threshold value 265.1 , gets in step 270 determines that the battery cell 10 ; 10 ' is leaking or "bad". Furthermore, in step 270 a sorting out of the battery cell 10 ; 10 ) or caused. If the second measurement and the first measurement differ by less than the predetermined threshold 265.2 , gets in step 275 determines that the battery cell 10 ; 10 ' is dense or "good". Furthermore, in step 275 , processing or installing the battery cell 10 ; 10 ' For example, be executed in a battery module or caused.

The second stage ends with step 280 ,

For a variety of battery cells 10 ; 10 ' the process can be carried out repeatedly.

Finally, it is noted that terms such as "comprising" and "having" or the like do not preclude that further elements or steps may be provided. The numbers used are merely exemplary, such that a plurality may include two, four, five, six, or more elements or steps. It should also be noted that articles like "a" or "an" do not exclude a multitude. Furthermore, it is noted that numerals such as "first", "second", etc., are only for discriminating elements and steps without specifying an order of arrangement of elements or execution of steps. In addition, the features described in connection with the various embodiments may be combined with each other as desired. Finally, it is noted that the reference signs in the claims should not be construed as limiting the scope of the claims.

Claims (13)

Device for leak testing a battery cell ( 10 ; 10 ' ), characterized by: - a detection device for detecting ( 215 ) of a first measured value of a parameter of the battery cell ( 10 ; 10 ' ), wherein the parameter is a mass, a volume, a dimension or a thickness of the battery cell ( 10 ; 10 ' ) and, after a period of time, detecting ( 255 ) a second measured value of the parameter of the battery cell ( 10 ; 10 ' ); A comparison device for comparing ( 265 ) of the second measured value with the first measured value; and a determining device for when the second measured value and the first measured value differ by more than a predetermined threshold value ( 265.1 ), Determining ( 270 ) that the battery cell ( 10 ; 10 ' ) or when the second measured value and the first measured value differ by less than the predetermined threshold value (FIG. 265.2 ), Determining ( 275 ) that the battery cell ( 10 ; 10 ' ) is tight. The apparatus of claim 1, further comprising: - a transfer means for transferring ( 220 . 240 ) of the first measured value and for transmission ( 225 . 245 ) an identification of the battery cell ( 10 ; 10 ' ); A provisioning means for providing ( 250 ) of the first measured value, the providing ( 250 ) can be done by means of identification; A storage device for storing the battery cell ( 10 ; 10 ' ) during the period of time; A transport device for transporting the battery cell ( 10 ; 10 ' ) during the period of time; A setting device for setting a predetermined state of charge or minimum state of charge of the battery cell ( 10 ; 10 ' ) during the time period or for setting a predetermined ambient condition, ambient temperature, ambient pressure or ambient humidity for the battery cell ( 10 ; 10 ' ) during the period of time; Acquiring measured values of further parameters during the time segment, the further parameters being a length of the time segment, an actual voltage of the battery cell ( 10 ; 10 ' ), an actual state of charge of the battery cell ( 10 ; 10 ' ), an actual ambient condition, ambient temperature, ambient pressure or ambient humidity for the battery cell ( 10 ; 10 ' ) during the period; or - determining ( 260 ) of the predetermined threshold value, wherein the predetermined threshold value can be made taking into account the measured values for the further parameters. The device according to claim 1 or 2, wherein: - the detection device measures the first measured value after the battery cell has been produced ( 10 ; 10 ' ) or in a goods issue; - The detection device detects the second measured value in a goods receipt or before production of a battery module; The determining device when determining that the battery cell ( 10 ; 10 ' ) is leaking ( 270 ), a sorting out of the battery cell ( 10 ; 10 ' ) or causes; The determining device when determining that the battery cell ( 10 ; 10 ' ) is tight ( 275 ), processing or installing the battery cell ( 10 ; 10 ' ) or causes; or - the battery cell ( 10 ; 10 ' ) as a prismatic battery cell or polymer cell with two opposite largest surfaces ( 120 ₁ , 120 ₂ ) is formed and the detection device, the first measured value and the second measured value at opposite centers ( 125 ₁ ) the largest areas ( 120 ₁ , 120 ₂ ). Procedure ( 20 ) for leak testing a battery cell ( 10 ; 10 ' ), characterized by: - detecting ( 215 ) of a first measured value of a parameter of the battery cell ( 10 ; 10 ' ), wherein the parameter is a mass, a volume, a dimension or a thickness of the battery cell ( 10 ; 10 ' ); After a period of time, capture ( 255 ) a second measured value of the parameter of the battery cell ( 10 ; 10 ' ); - To compare ( 265 ) of the second measured value with the first measured value; and if the second measured value and the first measured value differ by more than a predetermined threshold value ( 265.1 ), Determining ( 270 ) that the battery cell ( 10 ; 10 ' ) is leaking; or - if the second reading and the first reading differ by less than the predetermined threshold ( 265.2 ), Determining ( 275 ) that the battery cell ( 10 ; 10 ' ) is tight. The procedure ( 20 ) according to claim 4, further comprising: - transmitting ( 220 . 240 ) of the first measured value; - Transfer ( 225 . 245 ) an identification of the battery cell ( 10 ; 10 ' ); - Provide ( 250 ) of the first measured value, the providing ( 250 ) can be done by means of identification; - Storage of the battery cell ( 10 ; 10 ' ) during the period of time; - Transporting the battery cell ( 10 ; 10 ' ) during the period of time; Setting a predetermined state of charge or minimum state of charge of the battery cell ( 10 ; 10 ' ) during the period of time; Setting a predetermined ambient condition, ambient temperature, ambient pressure or ambient humidity for the battery cell ( 10 ; 10 ' ) during the period of time; Acquiring measured values of further parameters during the time segment, the further parameters being a length of the time segment, an actual voltage of the battery cell ( 10 ; 10 ' ), an actual state of charge of the battery cell ( 10 ; 10 ' ), an actual ambient condition, ambient temperature, ambient pressure or ambient humidity for the battery cell ( 10 ; 10 ' ) during the period; or - determining ( 260 ) of the predetermined threshold value, wherein the predetermined threshold value can be made taking into account the measured values for the further parameters. The procedure ( 20 ) according to claim 4 or 5, wherein: - detecting ( 215 ) of the first measured value after production of the battery cell ( 10 ; 10 ' ) or in a goods issue; - capturing ( 255 ) of the second measured value takes place in a goods receipt or before production of a battery module; - determining that the battery cell ( 10 ; 10 ' ) is leaking ( 270 ), a sorting out of the battery cell ( 10 ; 10 ' ) or causes; - determining that the battery cell ( 10 ; 10 ' ) is tight ( 275 ), processing or installing the battery cell ( 10 ; 10 ' ) or causes; or - the battery cell ( 10 ; 10 ' ) as a prismatic battery cell or polymer cell with two opposite largest surfaces ( 120 ₁ , 120 ₂ ) is formed and the detection ( 215 ) of the first measured value and the detection ( 255 ) of the second measured value at opposite centers ( 125 ₁ ) the largest areas ( 120 ₁ , 120 ₂ ). A computer program stored on a volume or memory of a computer and comprising computer readable instructions for executing the method of any one of claims 4 to 6 when the instructions are executed on the computer. A computer program product comprising the computer program of claim 7. Battery cell ( 10 ; 10 ' ), characterized in that it has passed through the device according to one of claims 1 to 3 or the method according to one of claims 4 to 6. Battery module, comprising: - the battery cell ( 10 ; 10 ' ) according to claim 9. A battery comprising: - the battery cell ( 10 ; 10 ' ) according to claim 9, or - the battery module according to claim 10. Battery system comprising: - the battery cell ( 10 ; 10 ' ) according to claim 9, - the battery module according to claim 10, or - the battery according to claim 11. Vehicle comprising: - the battery cell ( 10 ; 10 ' ) according to claim 9, connected to the vehicle, - the battery module according to claim 10, connected to the vehicle, - the battery according to claim 11, connected to the vehicle, or - the battery system according to claim 12, connected to the vehicle.

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