Battery Pack and Processing System

Abstract

To provide a battery pack capable of suppressing deformation, and thus exposure, of a pouch cell.SOLUTION: A battery pack is configured to include a first stack limiting structure 13, a second stack limiting structure, a plurality of pouch cells 21, and a sensor arrangement 30. The second stack limiting structure is disposed so as to be opposite to the first stack limiting structure at a fixed distance. The pouch cells are disposed in a stack. The stack is disposed between the first stack limiting structure and the second stack limiting structure and a height of the stack in a stack direction z is limited by the first stack limiting structure and the second stack limiting structure. The sensor arrangement is disposed in the stack. The sensor arrangement extends across a major part of a surface 21F of the pouch cells and is configured such that the height of the stack across the extension is approximately equal. The sensor arrangement has a pressure sensor 31. The pressure sensor is configured for detecting a pressure force DF acting in the stack direction z on the pouch cells.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a battery pack for supplying electric driving force to an electric processing device, and a processing system including such a battery pack and an electric processing device.

Summary of the Invention

[0002] The present invention is based on the problem of providing a battery pack for supplying electric driving force to an electric processing device, and a processing system including such a battery pack and an electric processing device. The battery pack has improved characteristics, particularly a relatively long life.

[0003] The present invention solves the problem by providing a battery pack having the features of claim 1 and a processing system having the features of claim 13. Advantageous developments and / or configurations of the present invention are described in the dependent claims.

[0004] The battery pack of the present invention is designed or configured to supply electric driving force, particularly automatically, to an electric processing device, particularly a processing device for gardening, forestry, and / or construction. The battery pack includes a first stack limiting structure, a second stack limiting structure, a plurality of pouch-type cells, and a sensor array. The second stack limiting structure is arranged at a certain distance on the opposite side of the first stack limiting structure. The pouch-type cells are arranged in a stack, particularly one on top of the other or stacked on top of each other. The stack is arranged between the first stack limiting structure and the second stack limiting structure. The height of the stack in the stack direction is limited by the first stack limiting structure and the second stack limiting structure, particularly by their certain distance. The sensor array is arranged in the stack. Further, the sensor array extends over most of the surface of the pouch-type cells and is configured such that the height of the stack is substantially equal over its extension. Further, the sensor array has a pressure sensor, particularly an electrical pressure sensor. The pressure sensor is configured to detect, particularly automatically detect, particularly measure the pressing force acting on the pouch-type cells in the stack direction.

[0005] The pressure sensor enables the detection, in particular the measurement, of the expansion of the pouch-type cell in the stack direction, if present. In particular, the expansion can cause an increase in the pressing force in conjunction with the limited height of the stack.

[0006] Furthermore, the extension over most of the surface of the pouch-type cell and the substantially equal height of the stack over that extension make it possible to suppress, or even completely prevent, the effects, in particular the adverse effects, of the sensor arrangement on the pouch-type cell, in particular on the flexible outer shell of the pouch-type cell. In particular, the deformation, in particular the local deformation, of the pouch-type cell and the resulting exposure, in particular the local exposure, can be suppressed or even completely prevented.

[0007] This enables a relatively long life of the pouch-type cell and thus a relatively long life of the battery pack.

[0008] In particular, a constant distance can mean that the distance between the first stack limiting structure and the second stack limiting structure changes only to a small extent or not at all compared to the cell thickness of the pouch-type cell in the stack direction, in particular during the expansion of the pouch-type cell. Additionally or alternatively, the second stack limiting structure can be arranged with its main surface, in particular, parallel to the main surface of the first stack limiting structure, in particular the first stack limiting structure.

[0009] The pouch-type cell can be configured to supply driving force to a processing device. Additionally or alternatively, the pouch-type cell can be a power storage cell or a battery cell, or in each case, an individual rechargeable power storage element of electrical energy that operates based on the principles of electrochemistry. In particular, the pouch-type cell can be a lithium-ion power storage cell. Further additionally or alternatively, the pouch-type cells can be electrically interconnected, particularly connected in series or in parallel. Further additionally or alternatively, the pouch-type cell can be a flat cell. Further additionally or alternatively, the surface of the pouch-type cell can be rectangular. Further additionally or alternatively, the pouch-type cells can be similar or identical, particularly of the same type and / or the same structure. Further additionally or alternatively, the stack can be a cuboid.

[0010] The pouch-type cells can be arranged in the stack with their respective main surfaces parallel to each other and / or orthogonal to the stacking direction and / or parallel to the main surface of the first stack limiting structure, particularly the first stack limiting structure, and / or parallel to the main surface of the second stack limiting structure, particularly the second stack limiting structure. Additionally or alternatively, the stack can be arranged with the stacking direction orthogonal to the main surface of the first stack limiting structure, particularly the first stack limiting structure, and / or the main surface of the second stack limiting structure, particularly the second stack limiting structure. Further additionally or alternatively, the distance can be in the stacking direction. Further additionally or alternatively, the height can correspond to the distance, particularly be equal.

[0011] The sensor array can be arranged on top of the stack, or on the upper surface of the stack, or much lower in the stack, or on the bottom surface of the stack. Additionally or alternatively, a majority of the surface can mean at least 70 percent (%) of the surface, particularly at least 80%, particularly at least 90%. In particular, the sensor array can extend across the entire surface of the pouch-type cell. Further additionally or alternatively, the sensor array can have specific gaps over its extent. Further additionally or alternatively, substantially equal can mean an error of at most 5%, particularly at most 2%, particularly at most 1%. Further additionally or alternatively, the height over its extent can be equal or uniform. Further additionally or alternatively, the sensor array can be arranged and configured between one of the stack limiting structures and one of the pouch-type cells, or between two pouch-type cells, such that the distance between the stack limiting structure and the pouch-type cell, or the distance between two pouch-type cells, is substantially equal over its extent. Further additionally or alternatively, the sensor array can have an equal, particularly substantially equal, particularly constant array thickness in the stacking direction over its extent. Further additionally or alternatively, the sensor array can be rectangular.

[0012] The pressure sensor can be configured to detect a pressing force acting orthogonally to the surface and / or the main surface with respect to the pouch-type cell. Additionally or alternatively, the pressure sensor can be configured, particularly as a mechanical switch, for qualitative detection of the pressing force or for quantitative measurement of the pressing force, particularly the value of the pressing force.

[0013] In a development example of the present invention, the sensor array is of an integrated or integral design or configuration. In particular, the sensor array can have an equal, particularly constant, array thickness in the stacking direction over its extent.

[0014] In a development example of the present invention, the sensor array has compensation spacers. The compensation spacers are arranged in the stack. Further, the compensation spacers are designed or configured separately from the pressure sensors. Further, the compensation spacers have sensor recesses. The pressure sensors are arranged or received within the sensor recesses. The spacer thickness of the compensation spacers and the sensor thickness of the pressure sensors in the stack direction are substantially equal. The spacer thickness enables compensation of the sensor thickness. In particular, the sensor thickness can be equal to the spacer thickness or slightly larger, for example by 0.1 millimeters. Thereby, the pressure sensors can be in the same plane as the compensation spacers including tolerances. Additionally or alternatively, the sensor array can be a design of multiple components or multiple parts.

[0015] In a development example of the present invention, the sensor array includes a film, in particular, is a film. In particular, in the case of an integrated sensor array design, the aforementioned array can be a film. Additionally or alternatively, in the case of a multi-part sensor array design, the compensation spacers and / or the pressure sensors can each be a film in particular.

[0016] In a development example of the present invention, the sensor array has a temperature sensor, in particular an electrical and / or internal temperature sensor. The temperature sensor is designed or configured to measure the temperature of the stack, in particular the internal temperature, in particular the value of the temperature, in particular automatically. The sensor array provides a synergistic effect. In particular, the temperature sensor, in particular the internal temperature sensor, can be an NTC thermistor.

[0017] In a development example of the present invention, the sensor array is arranged centrally between two pouch cells, in particular in the stack direction.

[0018] Additionally or alternatively, the pressure sensor and / or the temperature sensor, in particular the internal temperature sensor, if present, is arranged at the center of the surface of the pouch cell. Thereby, detection, in particular measurement, is possible at the position where the pressing force is maximum and / or the temperature, in particular the internal temperature, is the highest or hottest.

[0019] In particular, "at the center" means being closer to the center than the edge, and in particular, being spaced apart from the center by at most 20 millimeters (mm), in particular at most 10 mm, and in particular at most 5 mm.

[0020] In a development example of the present invention, the battery pack has a temperature sensor, in particular an electrical and / or external temperature sensor. The external temperature sensor is arranged and designed or configured to measure, in particular automatically measure, the external temperature of the stack, in particular the value of the temperature, outside the stack at the boundary or edge, in particular at the corner, of the first stack limiting structure or the second stack limiting structure of the stack, and / or outside the first stack limiting structure or the second stack limiting structure. This enables measurement at the position where the external temperature can be the lowest or the coldest. In particular, the external temperature sensor can be different from the internal temperature sensor, if present. Additionally or alternatively, the external temperature sensor can be arranged at the outermost edge, in particular at the corner, of one of the pouch-type cells. Additionally or alternatively, "at the edge or corner" means being closer to the edge or corner than the center, and in particular, being spaced apart from the edge or corner by at most 20 millimeters (mm), in particular at most 10 mm, and in particular at most 5 mm. Further additionally or alternatively, the external temperature sensor can be an NTC thermistor.

[0021] In a development example of the present invention, the battery pack has a control device, particularly an electrical control device. The control device is designed or configured to control, particularly automatically control, the battery pack according to the detected, particularly measured, pressing force and / or, if present, the measured temperature, particularly the internal temperature, and / or, if present, the measured external temperature. Thereby, it becomes possible to suppress or completely prevent a safety-critical state of the pouch-type cell and thus of the battery pack. In particular, the control device can be configured to control, particularly stop, the output of the electric driving force from the battery pack and / or the input of the charging power to the battery pack. Additionally or alternatively, the control device can be configured to detect the soundness of the battery pack according to the pressing force and / or the temperature, particularly the internal temperature and / or the external temperature, and control the battery pack according to the detected soundness.

[0022] In a development example of the present invention, the battery pack has a power input / output detection device, particularly a power input / output detection device. The power input / output detection device is designed or configured to detect, particularly automatically detect, the output of the electric driving force from the battery pack per unit time and / or the charging power, particularly the charging power input to the battery pack. The control device compares the detected, particularly measured, pressing force and / or a quantity based on the detected pressing force with a variable pressure limit value, particularly automatically compares them, and controls the battery pack, particularly automatically controls it, according to the result of the comparison. Further, the control device is designed or configured to change, particularly automatically change, particularly increase, the pressure limit value according to the detected output driving force and / or the detected input charging power per unit time. Thereby, it becomes possible to consider, in the case where it exists, a slight, particularly non-critical expansion of the pouch-type cell caused by changes over time, particularly related to use. In particular, at least one pressure limit value of the pouch-type cell can be predetermined. Additionally or alternatively, the control device is configured to control, particularly stop, the output of the electric driving force from the battery pack and / or the input of the charging power to the battery pack when the detected, particularly measured, pressing force and / or a quantity based on the detected pressing force reaches or exceeds the pressure limit value.

[0023] In a development example of the present invention, the battery pack has at least one buffer element. The at least one buffer element is arranged in the stack. Further, the at least one buffer element extends over most of the surface of the pouch-type cell and is designed or configured to buffer, in the case where it exists, the expansion of the pouch-type cell in the stack direction over the buffer thickness of the at least one buffer element. Thereby, it becomes possible to absorb or compensate for a slight, particularly non-critical expansion of the pouch-type cell caused by changes over time, in the case where it exists. In particular, the at least one buffer element may contain a foamed material, particularly sponge rubber, and may particularly be a foamed material. Additionally or alternatively, the at least one buffer element may be a heat insulating material, and the at least one heat insulating material may be respectively arranged between two pouch-type cells.

[0024] In a development example of the present invention, the battery pack has a stack housing, particularly a large-scale stack housing. The first stack limiting structure is the first housing wall of the stack housing, and the second stack limiting structure is the second housing wall of the stack housing. In the case of rupture of the pouch-type cell, this feature makes it possible to suppress or completely prevent the mechanical stress of the surrounding portion. In particular, the stack housing can have a rectangular parallelepiped shape. Additionally or alternatively, the stack housing can be partially or entirely made of aluminum.

[0025] In a development example of the present invention, the battery pack, particularly the pouch-type cell, has a maximum electric driving force of at least 1 kilowatt (kW), particularly at least 2 kW, and / or at most 10 kW, particularly at most 5 kW.

[0026] Additionally or alternatively, the battery pack, particularly the pouch-type cell, has a nominal voltage, particularly an electrical nominal voltage, of at least 10 volts (V), particularly at least 20 V, and / or at most 100 V, particularly at most 50 V.

[0027] Additionally or alternatively, the battery pack, particularly the pouch-type cell, has a maximum energy capacity, particularly a maximum electrical energy capacity, of at least 100 watt-hours (Wh), particularly at least 200 Wh, and / or at most 1000 Wh, particularly at most 500 Wh.

[0028] Additionally or alternatively, the battery pack has a mass of at least 0.5 kilograms (kg), particularly at least 1 kg, and / or at most 10 kg, particularly at most 5 kg.

[0029] Additionally or alternatively, the battery pack has a height of at least 2.5 centimeters (cm) and / or at most 10 cm, particularly in the stack direction, and / or a width of at least 5 cm and / or at most 20 cm, and / or a depth of at least 7.5 cm and / or at most 30 cm.

[0030] The processing system of the present invention comprises one battery pack already described, in particular said battery pack, and one electric processing device, in particular said electric processing device. The battery pack and the processing device are configured to be electrically connected to each other in order to supply, in particular automatically, the electric driving force from the battery pack to the processing device.

[0031] In particular, the processing system can be a processing system for gardening, forestry and / or construction. Additionally or alternatively, the processing device can be a processing device for gardening, forestry and / or construction. Further additionally or alternatively, the processing device can be a manually operated, in particular road surface guiding or portable, processing device. A particularly manually operated, in particular portable, processing device can mean that the processing device can have a maximum mass of 50 kilograms (kg), in particular 20 kg, in particular 10 kg. Further additionally or alternatively, the processing device can include an electric drive motor. Further additionally or alternatively, the battery pack and the processing device can be designed to be removably electrically connected to each other, in particular without using tools and / or without destruction, in particular by using a plug connector. Further additionally or alternatively, the battery pack and the processing device can be designed to be removably mechanically connected to each other, in particular without using tools and / or removably without destruction. In particular, the processing device can be designed to hold the battery pack.

[0032] In a development example of the present invention, the processing device has a battery storage part, in particular a battery compartment. The battery storage part is designed or configured to accommodate the battery pack.

[0033] In a development example of the present invention, the processing device is a saw, high branch pruner, clearing saw, brush cutter, pruning shears, tree cutter, blower device, leaf blower, lopper, cut-off grinder, sweeper device, roller sweeper, brush sweeper, lawn mower, dethatcher, or grass cutter.

[0034] Further advantages and aspects of the present invention can be gathered from the claims and from the following description of the preferred exemplary embodiments of the present invention, which will be described hereinafter with reference to the drawings.

Brief Description of the Drawings

[0035]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Best Mode for Carrying Out the Invention

[0036] Figures 1 to 12 show the battery pack 1 of the present invention for supplying the electric driving force AL to the electric processing device 101. The battery pack 1 includes a first stack limiting structure 13, a second stack limiting structure 14, a plurality of pouch-type cells 21, and a sensor array 30. As shown in FIG. 6, the second stack limiting structure 14 is arranged on the opposite side of the first stack limiting structure 13 with a certain distance 10A therebetween. As shown in FIG. 5, the pouch-type cells 21 are arranged in the stack 20. The stack 20 is arranged between the first stack limiting structure 13 and the second stack limiting structure 14. The height 20H of the stack 20 in the stack direction z is limited by the first stack limiting structure 13 and the second stack limiting structure 14. As shown in FIG. 4, the sensor array 30 is arranged in the stack 20. Further, the sensor array 30 extends over most of the surface 21F of the pouch-type cell 21 and is configured such that the height 20 of the stack 20 is substantially equal over its extension. Further, the sensor array 30 has a pressure sensor 31. The pressure sensor 31 is configured to detect, particularly measure, the pressing force DF acting on the pouch-type cell 21 in the stack direction z.

[0037] In the illustrated exemplary embodiment, the battery pack 1 includes ten pouch-type cells 21. In an alternative exemplary embodiment, the battery pack may include at least two pouch-type cells.

[0038] Further, in the illustrated exemplary embodiment, the first stack limiting structure 13 and the second stack limiting structure 14 extend in the directions x and y orthogonal to the stack direction z, respectively. Further, in the illustrated exemplary embodiment, the distance 10A is in the stack direction z. Further, in the illustrated exemplary embodiment, the height 20H is equal to the distance 10A. Further, in the illustrated exemplary embodiment, the pouch-type cells 21 extend in the directions x and y orthogonal to the stack direction z, respectively.

[0039] Furthermore, in the illustrated exemplary embodiment, the sensor array 30 extends in directions x and y that are orthogonal to the stack direction z. Furthermore, in the illustrated exemplary embodiment, the sensor array 30 extends across the entire surface 21F of the pouch-type cell 21. Furthermore, in the illustrated exemplary embodiment, the sensor array 30 has an equal arrangement thickness 30D in the stack direction z over its extent.

[0040] In the figures of FIGS. 1 to 11, the sensor array 30 is integral.

[0041] In FIG. 12, the sensor array 30 has a compensation spacer 32. The compensation spacer 32 is disposed in the stack 20. Furthermore, the compensation spacer 32 is separate from the pressure sensor 31. Furthermore, the compensation spacer 32 has at least one sensor recess 33, 38. The pressure sensor 31 is disposed within the sensor recess 33. The spacer thickness 32D of the compensation spacer 32 and the sensor thickness 31D of the pressure sensor 31 in the stack direction z are substantially equal.

[0042] Furthermore, in FIGS. 1 to 11, the sensor array 30 is a film 35. In FIG. 12, the sensor array 30 has a film 34, and in particular the compensation spacer 32 is a film 34.

[0043] Furthermore, as illustrated in FIGS. 4 and 12, the sensor array 30 has a temperature sensor 36, in particular an internal temperature sensor 36. The temperature sensor 36 is configured to measure the temperature T36 of the stack 20, in particular the internal temperature T36.

[0044] In FIG. 12, the internal temperature sensor 36 is disposed within the sensor recess 38. The sensor thickness 36D of the internal temperature sensor 36 is substantially equal to the spacer thickness 32D of the compensation spacer 32 and the sensor thickness 31D of the pressure sensor 31 in the stack direction z.

[0045] Furthermore, in the illustrated exemplary embodiment, the sensor array 30 is disposed centrally in the stack direction z between two pouch-type cells 21.

[0046] Furthermore, the pressure sensor 31 and the temperature sensor 36, particularly the internal temperature sensor 36, are arranged at the center 21FM of the surface 21F of the pouch-type cell 21.

[0047] In other words, the pressure sensor 31 and the temperature sensor 36, particularly the internal temperature sensor 36, are arranged at the intersection of the diagonals of the stack 20.

[0048] Furthermore, as shown in FIGS. 9 and 10, the battery pack includes an external temperature sensor 37. The external temperature sensor 37 is arranged and configured to measure the external temperature T37 of the stack 20 outside the stack 20 or the first stack limiting structure 13, particularly at the edges 20R, 13R, especially the corners 20E, 13E of the stack 20 or the first stack limiting structure 13.

[0049] In an alternative exemplary embodiment, the external temperature sensor may be arranged at the edge, particularly the corner, of the second stack limiting structure and / or outside the second stack limiting structure.

[0050] Furthermore, as shown in FIGS. 7 and 8, the battery pack 1 includes a control device 50. The control device 50 is configured to control the battery pack 1 according to the detected, particularly measured, pressing force DF, and the measured temperature T36, particularly the internal temperature T36 and the measured external temperature T37.

[0051] In particular, the control device 50 is electrically connected to the pressure sensor 31 and, in each case, to the temperature sensor 36, particularly the internal temperature sensor 36, and the external temperature sensor 37.

[0052] Furthermore, in the exemplary embodiment shown, the control device 50 is configured to measure the voltage of the pouch-type cell 21 and to control the battery pack 1 according to the measured voltage. In particular, the control device 50 is electrically connected to the pouch-type cell 21, particularly to the cell tab 22 of the pouch-type cell 21.

[0053] Furthermore, in the illustrated exemplary embodiment, the control device 50 includes at least one circuit board.

[0054] Furthermore, in the illustrated exemplary embodiment, the control device 50 is configured to control the output of the electric driving force AL from the battery pack 1 and / or the input of the charging power LL to the battery pack 1.

[0055] Specifically, the battery pack 1 includes a power input / output detection device 51. The power input / output detection device 51 is configured to detect the output electric driving force AL from the battery pack 1 per unit time t and / or the input charging power LL to the battery pack 1. The control device 50 is configured to compare the detected, particularly measured, pressing force with a variable pressure limit value DFG and control the battery pack 1 according to the result of the comparison. Furthermore, the control device 50 is configured to change, particularly increase, the pressure limit value DFG according to the detected output driving force AL and / or the detected input charging power LL per unit time t.

[0056] In an alternative exemplary embodiment, the control device is configured to compare a quantity based on the detected pressing force DF with a variable pressure limit value.

[0057] In the illustrated exemplary embodiment, at least one pressure limit value DFG of the pouch-type cell 21 is predetermined.

[0058] Furthermore, in the illustrated exemplary embodiment, the control device 50 is configured to compare the measured temperature T36, particularly the internal temperature T36, and / or a quantity based on the measured temperature T36, particularly the internal temperature T36, with a temperature comparison quantity, particularly an internal temperature comparison quantity, particularly an internal temperature limit value T36G. The temperature comparison quantity, particularly the internal temperature comparison quantity T36G, depends on, particularly is predetermined by, at least one, particularly one in the center, of the pouch-type cells 21. Furthermore, the control device 50 is configured to control the battery pack 1 according to the result of the comparison.

[0059] Furthermore, in the illustrated exemplary embodiment, the control device 50 is configured to compare the measured external temperature T37 and / or a quantity based on the measured external temperature T37 with an external temperature comparison quantity, in particular an external temperature limit value T37G. The external temperature limit value T37G depends on at least one, in particular the outermost one, of the pouch-type cells 21 and is in particular thereby predetermined. Furthermore, the control device 50 is configured to control the battery pack 1 according to the result of the comparison.

[0060] Additionally or alternatively, in an alternative exemplary embodiment, the control device may be configured to compare the difference between the measured temperature, in particular the internal temperature, and the measured external temperature with a temperature comparison quantity, in particular a differential temperature limit value. The temperature comparison quantity may depend on at least one of the pouch-type cells and may in particular thereby be predetermined. Furthermore, the control device may be configured to control the battery pack according to the result of the comparison.

[0061] Furthermore, in the illustrated exemplary embodiment, the control device 50 is arranged on the stack 20, in particular on the surface 20V on the stack 20, in particular on the front face. The external temperature sensor 37 is arranged on the surface 20O facing away from the stack 20, in particular on the upper face, in particular at the most distant edges 20R, 13R of the stack 20 or the first stack limiting structure 13.

[0062] Furthermore, in the illustrated exemplary embodiment, the battery pack 1 comprises a plurality of battery pack contacts 71. The battery pack contacts 71 are configured to electrically connect the battery pack 1 and the processing device 101 to supply the processing device 101 with the electrical driving force AL from the battery pack 1. Furthermore, the battery pack 1 comprises a battery pack contact support 70. The battery pack contact support 70 supports the battery pack contacts 71 and the external temperature sensor 37. Furthermore, the battery pack contact support 70 is arranged on the first stack limiting structure 13 and the second stack limiting structure 14.

[0063] Furthermore, as illustrated in FIG. 11, in the exemplary embodiment shown, the battery pack 1 includes a battery pack housing 80. The pouch-type cell 21, and in particular the first stack limiting structure 13, the second stack limiting structure 14, the sensor array 30, the external temperature sensor 37, the control device 50, the power input / output detection device 51, and the battery pack contact support 70 are disposed within the battery pack housing 80. Further, the battery pack 1 includes at least one air cooling circuit 90 within the battery pack housing 80 that includes a number of air inlets 91 and a number of air outlets 92 for the cooling air flow LS, and the cooling air flow LS passes from the number of air inlets 91 over the pouch-type cell 21, in particular the first stack limiting structure 13 and / or the second stack limiting structure 14, to the number of air outlets 92 in order to cool the pouch-type cell 21. The external temperature sensor 37 is disposed within the air cooling circuit 90 between the number of air inlets 91 and the number of air outlets 92, and in particular faces the number of air inlets 91 and / or the number of air outlets 92.

[0064] Furthermore, the battery pack 1 includes a stack housing 10, in particular a large-scale stack housing 10. The first stack limiting structure 13 is the first housing wall of the stack housing 10, and the second stack limiting structure 14 is the second housing wall of the stack housing 10.

[0065] In the exemplary embodiment shown, the stack housing 10 includes a first housing portion 11 and a second housing portion 12. The stack 20 is disposed between the first housing portion 11 and the second housing portion 12. The first housing portion 11 and the second housing portion 12 are mechanically interconnected by at least one material joining engagement 10S, in particular a welded connection.

[0066] In particular, in the exemplary embodiment shown, the stack housing 10 has five housing walls 13, 14, 15, 16, 17. The first housing part 11 has a first housing wall or upper surface wall 13, a housing wall, in particular a peripheral wall 15, and a housing wall, in particular a rear wall 17. The second housing part 12 has a second housing wall or bottom wall 14 and a housing wall 16, in particular a peripheral wall.

[0067] Furthermore, in the exemplary embodiment shown, the stack housing 10 has a thermal connection to the pouch-type cell 21 and has thermal conductivity.

[0068] In particular, the stack housing 10, in particular the housing walls 13, 14, 15, 16, 17, physically contact the pouch-type cell 21, and a thermal conductive paste is provided between the pouch-type cell 21 and the housing walls 15, 16, 17.

[0069] Furthermore, in the exemplary embodiment shown, the stack housing 10 has a common housing opening 10O defined in particular by the housing walls 13, 14, 15, 16. The pouch-type cell 21 is configured and arranged in the stack 20 within the stack housing 10 such that the cell tab 22 is arranged on the common housing opening 10O at the front or common tab surface 20V of the stack 20.

[0070] Furthermore, the battery pack 1 comprises at least one buffer element 60. The at least one buffer element 60 is arranged in the stack 20. Furthermore, the at least one buffer element 60 extends over a majority of the surface 21F of the pouch-type cell so as to buffer, if present, the expansion of the pouch-type cell 21 in the stack direction z over the buffer thickness 60D of the at least one buffer element 60.

[0071] In the exemplary embodiment shown, the battery pack 1 includes five buffer elements 60. In an alternative exemplary embodiment, the battery pack may include only a single buffer element.

[0072] In particular, in the exemplary embodiments shown, two pouch cells 21 are each arranged between two buffer elements 60.

[0073] Furthermore, in the exemplary embodiments shown, at least one buffer element 60 extends in directions x, y orthogonal to the stack direction z. Furthermore, in the exemplary embodiments shown, at least one buffer element 60 extends over the entire surface 21F of the pouch cell 21. Furthermore, in the exemplary embodiments shown, at least one buffer element 60 has, in particular at the time before buffering, an equal buffer thickness 60D in the stack direction z over its extent.

[0074] Furthermore, in the exemplary embodiments shown, at least one buffer element 60 is a heat insulating material.

[0075] When the cell thickness 21D of the pouch cell 21 increases due to the expansion of the pouch cell 21, the expansion can no longer be buffered by at least one buffer element 60, and as a result, the pressing force DF increases, and this phenomenon is detected by the pressure sensor 31.

[0076] Furthermore, in the exemplary embodiments shown, the cell tab 22 and the control device 50 are surrounded by a casting material, in particular a casting material having thermal conductivity. The casting material reaches up to the outer shell of the pouch cell 21.

[0077] Furthermore, in the exemplary embodiments shown, the battery pack 1 has a maximum electric driving force MAL of 3 kW. In alternative exemplary embodiments, the battery pack may have a maximum electric driving force of at least 1 kW and / or at most 10 kW.

[0078] Furthermore, in the exemplary embodiments shown, the battery pack 1 has a nominal voltage NSP of 36V. In alternative exemplary embodiments, the battery pack may have a nominal voltage of at least 10V and / or at most 100V.

[0079] Furthermore, in the illustrated exemplary embodiment, the battery pack 1 has a maximum energy capacity MEI of 337 Wh. In alternative exemplary embodiments, the battery pack may have a maximum energy capacity of at least 100 Wh and / or at most 1000 Wh.

[0080] Furthermore, in the illustrated exemplary embodiment, the battery pack 1 has a mass m1 of 2 kg. In alternative exemplary embodiments, the battery pack may have a mass of at least 0.5 kg and / or at most 10 kg.

[0081] Furthermore, in the illustrated exemplary embodiment, the battery pack 1 has a height 1H of 5 cm, particularly in the stack direction z, a width 1B of 10 cm, particularly in the x direction, and a depth 1T of 15 cm, particularly in the y direction. In alternative exemplary embodiments, the battery pack may have a height of at least 2.5 cm and / or at most 10 cm, and / or a width of at least 5 cm and / or at most 20 cm, and / or a depth of at least 7.5 cm and / or at most 30 cm.

[0082] FIG. 1 shows a processing system 100 of the present invention. The processing system 100 includes a battery pack 1 and an electric processing device 101. The battery pack 1 and the processing device 101 are configured to be electrically connected to each other to supply an electric driving force AL from the battery pack 1 to the processing device 101, and in particular, are electrically connected.

[0083] Specifically, the processing device 101 has a battery housing 102. The battery housing 102 is configured to house the battery pack 1. In particular, the battery pack 1 is housed.

[0084] In the view of FIG. 1, the electric processing device 101 is a saw 101', a cut-off grinder 101'', or a blower device 101'''. In alternative exemplary embodiments, the processing device can be a pole pruner, a clearing saw, a brush cutter, a pruning shear, a tree cutter, a leaf blower, a lopper, a sweeper device, a roll sweeper, a brush sweeper, a lawn mower, a dethatcher, or a grass cutter.

[0085] As is apparent from the exemplary embodiments illustrated and described above, the present invention provides a battery pack for supplying an electric driving force to an electric processing device, the battery pack having improved characteristics, particularly a relatively long life, as well as a processing system including such a battery pack and an electric processing device.

Claims

1. A battery pack (1) for supplying electric driving force (AL) to an electric processing device (101), wherein the battery pack (1) comprises: a first stack limiting structure (13) and a second stack limiting structure (14); a plurality of pouch-type cells (21); a sensor array (30) and is provided with; The second stack limiting structure (14) is arranged at a certain distance (10A) on the opposite side of the first stack limiting structure (13); The pouch-type cells (21) are arranged in a stack (20), and the stack (20) is arranged between the first stack limiting structure (13) and the second stack limiting structure (14). The height (20H) of the stack (20) in the stack direction (z) is limited by the first stack limiting structure (13) and the second stack limiting structure (14); The sensor array (30) is arranged in the stack (20), and the sensor array (30) extends over at least 70% of the surface (21F) of the pouch-type cell (21). The height (20H) of the stack (20) over the extension is configured to be substantially equal. The sensor array (30) has a pressure sensor (31), and the pressure sensor (31) is configured to detect a pressing force (DF) acting on the pouch-type cell (21) in the stack direction (z); The sensor array (30) has a compensation spacer (32), and the compensation spacer (32) is arranged in the stack (20). The compensation spacer (32) is separate from the pressure sensor (31). The compensation spacer (32) has a sensor recess (33), and the pressure sensor (31) is arranged in the sensor recess (33). The spacer thickness (32D) of the compensation spacer (32) and the sensor thickness (31D) of the pressure sensor (31) in the stack direction (z) are substantially equal; Battery pack (1).

2. The battery pack (1) according to claim 1, wherein the sensor array (30) has an integrated design.

3. The battery pack (1) according to any one of claims 1 to 2, wherein the sensor array (30) includes films (34, 35).

4. The battery pack (1) according to any one of claims 1 to 3, wherein the sensor array (30) has a temperature sensor (36), and the temperature sensor (36) is configured to measure the temperature (T36) of the stack (20).

5. The sensor array (30) is disposed between two pouch-type cells (21) and / or The battery pack (1) according to claim 4, wherein the pressure sensor (31) and / or the temperature sensor (36) is disposed at the center (21FM) of the surface (21F) of the pouch-type cell (21).

6. The battery pack (1) includes an external temperature sensor (37), and the external temperature sensor (37) is located outside the stack (20) at the edge (20R, 13R) of the stack (20), the first stack limiting structure (13) or the second stack limiting structure (14), and / or outside the first stack limiting structure (13) or the second stack limiting structure (14), and is arranged and configured to measure the external temperature (T37) of the stack (20). The battery pack (1) according to claim 4 or 5.

7. The battery pack (1) includes a control device (50), and the control device (50) is configured to output the electric driving force (AL) from the battery pack (1) and / or input the charging power (LL) to the battery pack (1) according to the detected pressing force (DF) and / or the measured temperature (T36) and / or the measured external temperature (T37). The battery pack (1) according to claim 6, which is configured to control.

8. The battery pack (1) includes a power input / output detection device (51). The power input / output detection device (51) is configured to detect the output electric driving force (AL) and / or the input charging power (LL) per unit time (t). The control device (50) compares the detected pressing force (DF) and / or a quantity based on the detected pressing force (DF) with a variable pressure limit value (DFG), and is configured to control the battery pack (1) according to the result of the comparison. The control device (50) is configured to change the pressure limit value (DFG) according to the detected driving force (AL) of the output and / or the detected charging power (LL) of the input per unit time (t). The battery pack (1) according to claim 7.

9. The battery pack (1) comprises at least one buffer element (60), the at least one buffer element (60) being arranged in the stack (20), the at least one buffer element (60) extending over a majority of the surface (21F) of the pouch-type cell (21) and being configured to buffer expansion of the pouch-type cell (21) in the stack direction (z) over the buffer thickness (60D) of the at least one buffer element (60), the battery pack (1) according to any one of claims 1 to 8.

10. The battery pack (1) comprises a stack housing (10), the first stack limiting structure (13) being a first housing wall of the stack housing (10) and the second stack limiting structure (14) being a second housing wall of the stack housing (10), the battery pack (1) according to any one of claims 1 to 9.

11. The battery pack (1) has a maximum electric driving force (MAL) of at least 1 kW and / or at most 10 kW, and / or The battery pack (1) has a nominal supply voltage (NSP) of at least 10 V and / or at most 100 V, and / or The battery pack (1) has a maximum energy capacity (MEI) of at least 100 Wh and / or at most 1000 Wh, and / or The battery pack (1) has a mass (m1) of at least 0.5 kg and / or at most 10 kg, and / or The battery pack (1) has a height (1H) of at least 2.5 cm and / or at most 10 cm, and / or a width (1B) of at least 5 cm and / or at most 20 cm, and / or a depth (1T) of at least 7.5 cm and / or at most 30 cm, the battery pack (1) according to any one of claims 1 to 10.

12. A battery pack (1) according to any one of claims 1 to 11, an electric processing device (101), comprising a processing system (100), wherein the battery pack (1) and the processing device (101) are configured to be electrically connected to each other in order to supply an electric driving force (AL) from the battery pack (1) to the processing device (101).

13. The processing system (100) according to claim 12, wherein the processing device (101) has a battery storage unit (102), and the battery storage unit (102) is configured to store the battery pack (1).

14. The processing system (100) according to claim 12 or 13, wherein the processing device (101) is a saw (101'), a pole pruner, a clearing saw, a brush cutter, a pruning shear, a tree cutter, a blower device (101'''), a leaf blower, a lopper, a cut-off grinder (101''), a sweeper device, a roll sweeper, a brush sweeper, a lawn mower, a dethatcher or a grass cutter.