Battery pack, processing system, and method for producing battery pack

Abstract

To provide a battery pack, relatively simple production of which is enabled and a relatively simple structural design of which is allowed.SOLUTION: There is provided a battery pack 1 for supplying an electrically driven treatment apparatus with electric driving power. The battery pack 1 comprises a stack housing 10 and a plurality of pouch cells. The stack housing 10 has a common housing opening 10O defined by a housing edge 10R and the pouch cells have cell tabs 22. The pouch cells are configured and disposed in a stack state within the stack housing 10 such that the cell tabs 22 at least with tab parts 22T on the common housing opening 10O project beyond at least one edge portion 10RA of the housing edge 10R. The tab parts 22T are directly electrically connected to each other by welded connections 22S.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a battery pack for supplying electric driving force to an electric processing device, a processing system including such a battery pack and an electric processing device, and a method for manufacturing a battery pack for supplying electric driving force to 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, a processing system including such a battery pack and an electric processing device, and a method for manufacturing a battery pack for supplying electric driving force to an electric processing device, and each of the battery pack and the method has improved characteristics.

[0003] The present invention solves the problem by providing a battery pack having the features of claim 1, a processing system having the features of claim 12, and a method 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, particularly automatically, electric driving force to an electric processing device, in particular gardening equipment, forestry equipment and / or construction equipment. The battery pack includes a stack housing and a plurality of pouch-type cells. The stack housing has a common housing opening, particularly defined or limited by a housing edge of the stack housing. The pouch-type cell has a cell tab, and the pouch-type cell is stacked in the stack housing, particularly in each case, such that at least the tab portion of the cell tab having the common housing opening, in particular all of the cell tabs, protrudes outwardly beyond at least one edge portion of the housing edge, particularly through the housing opening, and is designed or configured and arranged. In particular, all of the tab portions are directly electrically connected to each other by a welding connection.

[0005] At the time when the pouch-type cells are stacked in the stack housing due to the protrusion of the tab portions, the tab portions can be accessed relatively easily from the outside, and by the welding connection portions, they can be electrically connected to each other in a relatively simple manner, or connected, and the battery pack can be manufactured in a relatively simple manner.

[0006] In particular, the stack housing can be large and / or rectangular parallelepiped in shape. Additionally or alternatively, the stack housing can be partially or completely made of aluminum.

[0007] 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 storage cell or a battery cell, or can be an individual rechargeable storage element of electrical energy that operates based on the principle of electrochemistry in each case. In particular, the pouch-type cell can be a lithium-ion storage cell. Further additionally or alternatively, the pouch-type cells can be in parallel or in series. Further additionally or alternatively, in particular in each case, the tab portions of the next pouch-type cell can be directly electrically connected to each other by one of the welding connection portions. Further additionally or alternatively, the tab portions can be directly mechanically connected to each other by the welding connection portions. 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, especially of the same type and / or the same structure.

[0008] The cell tab can be referred to as a contact tab, cell contact, terminal, pole, or connector electrode.

[0009] The term "directly" can mean without intermediate elements.

[0010] The welding connection portion can be a laser welding connection portion or an ultrasonic welding connection portion.

[0011] Pouch cells can be arranged in a stack, overlapping or superposed, especially parallel to each other on their respective main faces. Additionally or alternatively, the stack can be cuboid. Further additionally or alternatively, a pouch cell having an outer shell or cell housing can be arranged in a stack within a stack housing, especially completely and / or only in a stacked manner. Further additionally or alternatively, the tab portion can be arranged especially completely outside the stack housing and / or only outside the stack housing. Further additionally or alternatively, there is no need for a housing wall to be arranged between the tab portion and the outer shell or cell housing. Further additionally or alternatively, a cell tab having a tab portion can protrude beyond an edge portion, especially in each case, the next or adjacent edge portion, especially in each case. In particular, a cell tab having a tab portion can protrude beyond a housing edge, especially a complete housing edge. Further additionally or alternatively, a cell tab having a tab portion can protrude beyond at least one edge portion by at least 2 millimeters (mm), especially at least 5 mm, especially more than at least 10 mm, especially in each case.

[0012] In a development example of the present invention, the common housing opening is the only housing opening for a cell tab, especially for a tab portion, especially protruding beyond it.

[0013] Additionally or alternatively, a pouch cell is designed or configured, arranged such that in a stacked manner, all of the cell tabs, especially the cell tabs, especially the tab portions, are arranged on a common tab surface of the stack, especially the only one, especially the common tab surface of a single stack.

[0014] This enables a relatively simple structural design of the battery pack and a relatively simple manufacture of the battery pack.

[0015] In particular, the pouch-type cell may have cell tabs, especially in each case, at the same boundary or the same edge of the outer shell or cell shell of the pouch-type cell. Additionally or alternatively, the tab surface can be one of the surfaces of the cuboid of the stack in the case of a cuboid shape. Further additionally or alternatively, the stack having a common tab surface can be arranged in a common housing opening.

[0016] In a development of the invention, the housing edge defines the opening surface of the housing opening, especially the common housing opening. The tab portion, especially all of the tab portion, extends only parallel to the opening surface. Thereby, the welding connection can be manufactured or is manufactured in a relatively simple manner. In particular, the opening surface can be parallel to the tab surface, or can extend parallel thereto, or the tab portion can extend parallel to the tab surface, if present. Additionally or alternatively, the tab portion can be the bent portion of the cell tab, and especially in each case, projects beyond the next or adjacent edge portion, especially in each case, in the extension of the bending axis of the cell tab 22. Further additionally or alternatively, the housing wall does not need to be arranged between the tab portion extending in parallel and the outer shell or cell shell.

[0017] In a development of the invention, the battery pack comprises at least one power connector. The power connector is electrically connected, especially directly and especially mechanically, to one of the tab portions by a welding connection. Due to the protrusion of the tab portion, at the time after arranging the pouch-type cells in a stacked manner within the stack housing, the tab portion can be connected or is connected to the power connector by a welding connection in a relatively simple manner. In particular, thereby, at the time after arranging the pouch-type cells in a stacked manner within the stack housing, the tab portions can be connected or are connected to each other and the tab portions can be connected to the power connector, especially in a single, especially single and / or common manufacturing step, especially each, by a welding connection. In particular, the power connector can be arranged at least partially, especially parallel to the tab portion, between the tab portion extending in parallel and the edge portion.

[0018] In a development example of the present invention, the stack housing is in the shape of a rectangular parallelepiped and has at least four, particularly five, housing walls. The wall edges of the housing walls define or delimit, in particular, housing openings on the circumferential surface, particularly a common housing opening.

[0019] In a development example of the present invention, the stack housing has one first housing wall, particularly the aforementioned first housing wall, and a second housing wall, particularly the aforementioned second housing wall. The second housing wall is arranged at a distance, particularly a constant distance, on the opposite side of the first housing wall. The stack is arranged between the first housing wall and the second housing wall. The height of the stack in the stack direction is restricted by the first housing wall and the second housing wall, particularly by their distance. In particular, the constant distance means that the distance between the first housing wall and the second housing wall can change only slightly or not at all compared to the cell thickness of the pouch-type cell in the stack direction during the expansion of the pouch-type cell. Additionally or alternatively, the second housing wall, particularly having a main surface, can be arranged parallel to the first housing wall, particularly the main surface of the first housing wall. Further additionally or alternatively, the pouch-type cells can be arranged in a stack with their respective main surfaces perpendicular to the stack direction and / or parallel to the main surface of the first housing wall, particularly the main surface of the first housing wall, and / or parallel to the main surface of the second housing wall, particularly the main surface of the second housing wall. Further additionally or alternatively, the stack can be arranged with the stack direction perpendicular to the main surface of the first housing wall, particularly the main surface of the first housing wall, and / or the main surface of the second housing wall, particularly the main surface of the second housing wall. Further additionally or alternatively, the distance can be in the stack direction. Further additionally or alternatively, the height can correspond to the distance, particularly be equal.

[0020] In a development example of the present invention, the stack housing has a first housing part and a second housing part. The first housing part has a first housing wall. The second housing part has a second housing wall. Further, the first housing part and the second housing part are mechanically, in particular directly, connected to each other by at least one welded connection. Due to the protrusion of the tab portions, at the time after the pouch-type cells are stacked in the stack housing, the tab portions can be connected to each other, if present, the tab portions to the power connector, and / or the first housing part and the second housing part to each other, in particular in a single, in particular unique, and / or common manufacturing step, in particular each, by the welded connection.

[0021] In a development example of the present invention, the battery pack comprises at least one compensating element. The at least one compensating element is arranged in the stack. Further, the at least one compensating element extends over a major part of the surface of the pouch-type cell and is designed or configured to adjust, over the compensating thickness of the at least one compensating element, the height of the stack to the distance between the first housing wall and the second housing wall, in particular a constant distance. In particular, the at least one compensating element may comprise in particular a foamed material, in particular sponge rubber. Additionally or alternatively, the at least one compensating element may be configured to cushion the expansion of the pouch-type cell in the stacking direction, if present. Further additionally or alternatively, the at least one compensating element may be a thermal insulator, and the at least one thermal insulator may be arranged between two pouch-type cells in each case. Further additionally or alternatively, the major part of the surface may mean at least 70 percent (%) of the surface, in particular at least 80%, in particular at least 90%. In particular, the at least one compensating element may extend over the entire surface of the pouch-type cell.

[0022] In a development example of the present invention, the pouch-type cells are designed or configured and arranged in a stacked manner such that the cell tabs, in particular all of the cell tabs, are arranged particularly precisely, especially only in two tab rows. The edges facing away from or far from the opposite sides of the tab rows define or delimit an intermediate region, in particular the only intermediate region, in particular a single intermediate region. The battery pack includes a circuit board. The circuit board is arranged particularly completely and / or only within the intermediate region and is electrically connected, and in particular mechanically connected, to a number of cell tabs, in particular tab portions, in particular in each case, by welding connections. Thereby, the cell tabs, in particular the tab portions, can still be relatively easily accessible from the outside at the time after the arrangement of the circuit board, and can be electrically connected to each other in a relatively simple manner by the welding connections. In particular, thereby, at the time after arranging the pouch-type cells in a stacked manner within the stack housing, if the tab portions are present, the tab portions are connected to each other, if the tab portions are present, to the power connector, if the first housing part and the second housing part are present, to each other, and / or the circuit board is connected to a number of cell tabs, in particular tab portions, in particular the only one, in particular a single and / or common manufacturing step, in particular by each of the welding connections. In particular, the pouch-type cells, in particular each one of the cell tabs of the pouch-type cells, and the tab rows can be spaced apart from each other. In other words, each of the pouch-type cells has two cell tabs spaced apart from each other, and the pouch-type cells are configured and arranged in a stacked manner such that the cell tabs of different pouch-type cells can be arranged in the first one of the tab rows, and the other cell tabs of different pouch-type cells can be arranged in the second one of the tab rows, and the first tab row and the second tab row can be spaced apart from each other. Additionally or alternatively, the tab rows can be referred to as rows of tabs. Additionally or alternatively, the tab rows can be parallel to each other or can extend in parallel. Additionally or alternatively, the circuit board can be arranged on the stack. In particular, being on the stack can mean that the circuit board can be spaced apart from the stack by a maximum of 20 mm, in particular a maximum of 10 mm, in particular a maximum of 5 mm.Additionally or alternatively, the circuit board need not reach to the edges facing the opposite side. Additionally or alternatively, the circuit board may be disposed between tab rows, particularly between the opposing or adjacent edges of the tab rows. Additionally or alternatively, the circuit board may at least partially expose or not cover the tab rows, particularly in each case. Additionally or alternatively, the circuit board may be electrically connected by electrical cell connectors to a number of cell tabs, particularly to the tab portions. Additionally or alternatively, the circuit board can hold measurement electronics, which may be configured to measure, particularly automatically, all voltages of a pouch-type cell, particularly the electrical voltage, particularly the value of the voltage. Additionally or alternatively, the circuit board may be disposed in a housing opening, particularly a common housing opening.

[0023] In a development of the invention, the battery pack comprises a frame. The frame supports the circuit board and is disposed in a housing opening, particularly a common housing opening. The cell tabs, particularly all of the cell tabs, and the circuit board are fixed and positioned relative to one another by the stack housing and the frame. The stack housing and the frame enable a relatively simple positioning. In particular, the cell tabs, particularly the tab portions, may be disposed in the housing opening. Additionally or alternatively, the frame may be composed partially or completely of a synthetic material.

[0024] In a development of the invention, the battery pack, particularly a 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.

[0025] Additionally or alternatively, the battery pack, particularly a 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.

[0026] 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.

[0027] 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.

[0028] Additionally or alternatively, the battery pack has a height of at least 2.5 centimeters (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.

[0029] The processing system of the present invention comprises one battery pack, particularly the battery pack, already described, and one electric processing device, particularly the electric processing device. The battery pack and the processing device are configured to be electrically connected to each other to supply, particularly automatically supply, the electric driving force from the battery pack to the processing device.

[0030] 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 processing device, in particular for road surface guidance or portable use. A manually operated processing device, in particular a portable one, 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 configured to be electrically connected to each other removably, 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 configured to be mechanically connected to each other removably, in particular without using tools and / or without destruction. In particular, the processing device can be configured to hold the battery pack.

[0031] In a development example of the present invention, the processing device has a battery storage part, in particular a battery chamber. The battery storage part is designed or configured to accommodate the battery pack.

[0032] In a development example of the present invention, the processing device is a saw, a pole pruner, a clearing saw, a brush cutter, a pruning shears, a tree cutter, a blower device, a leaf blower, a lopper, a cut-off grinder, a sweeper device, a roll sweeper, a brush sweeper, a lawn mower, a dethatcher or a grass cutter.

[0033] One electric processing device, in particular one battery pack for supplying electric driving force to the above-mentioned electric processing device, in particular a method for manufacturing the above-mentioned battery pack, the method comprising: a) arranging a plurality of pouch-type cells, in particular the above-mentioned plurality of pouch-type cells, in a stack housing, in particular in the above-mentioned stack housing, in a stack, in particular in the above-mentioned stacked configuration, the stack housing having a housing edge, in particular a common housing opening defined by the above-mentioned housing edge, in particular the above-mentioned common housing opening, the pouch-type cells having cell tabs, in particular the above-mentioned cell tabs, the pouch-type cells being configured such that at least the tab portion, in particular the tab portion of the cell tab having the above-mentioned tab portion, projects beyond at least one edge portion of the housing edge, in particular the above-mentioned edge portion; and b) at a point in time after the arrangement, welding the tab portions to electrically connect them directly to each other.

[0034] The method enables the same advantages as the battery pack described above.

[0035] In particular, the welding can be laser welding or ultrasonic welding.

[0036] In a development example of the present invention, the housing edge defines an opening plane, in particular the opening plane of the housing opening, in particular the common housing opening. The tab portion extends parallel to the opening plane. Step b) includes arranging a welding base or a welding jig, in particular a welding anvil, at least partially between at least one of the tab portions extending parallel to each other and an edge portion, in particular an edge portion parallel to the tab portion, and welding the tab portions using the welding base or the welding jig. This feature is made possible by the protrusion of the tab portion. In particular, the welding base may be removed from the battery pack, in particular at a point in time after step b), or welded respectively.

[0037] In a development example of the present invention, the stack housing has one first housing part, in particular the aforementioned first housing part, and one second housing part, in particular the aforementioned second housing part. The first housing part has one first housing wall, in particular the aforementioned first housing wall, and the second housing part has one second housing wall, in particular the aforementioned second housing wall. Step a) involves placing the stack against the first housing wall, and at a subsequent point in time, the second housing wall is placed at a distance, in particular the aforementioned distance, on the opposite side of the first housing wall, and the stack is placed between the first housing wall and the second housing wall. In particular, the height of the stack in the stack direction, in particular the aforementioned height of the stack, includes arranging the second housing wall in a stacked manner such that it is restricted by the first housing wall and the second housing wall. Step b) includes welding the first housing part and the second housing part to mechanically connect them to each other, in particular directly. This is facilitated by the protrusion of the tab portion. In particular, the welding can be laser welding or ultrasonic welding.

[0038] Further advantages and aspects of the present invention can be summarized from the claims and from the following description of the preferred exemplary embodiments of the present invention, which will be described below with reference to the drawings.

Brief Description of the Drawings

[0039]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

DETAILED DESCRIPTION OF THE INVENTION

[0040] FIGS. 1 to 14 show the battery pack 1 of the present invention for supplying the electric driving force AL to the electric processing device 101, and the method of the present invention for manufacturing the battery pack 1 for supplying the electric driving force AL to the electric processing device 101.

[0041] The battery pack 1 includes a stack housing 10 and a plurality of pouch-type cells 21. As shown in FIG. 7, the stack housing 10 has a common housing opening 10O defined by a housing edge 10R. The pouch-type cell 21 has a cell tab 22, and the pouch-type cell 21 has at least a tab portion 22T in the stack 20 shape within the stack housing 10. The cell tab 22, particularly in each case, is configured and arranged at the common housing opening 10O to protrude outward beyond at least one edge portion 10RA of the housing edge 10R, particularly passing through the housing opening 10O. The tab portions 22T are directly and electrically connected to each other by welding connections 22S.

[0042] The method comprises: a) a step of arranging a plurality of pouch-type cells 21 in a stack 20 shape within a stack housing 10, the stack housing 10 having a common housing opening 10O defined by a housing edge 10R, the pouch-type cell 21 having a cell tab 22, and the pouch-type cell 21 having at least a tab portion 22T at the common housing opening 10O, the cell tab 22 being configured to protrude beyond at least one edge portion 10RA of the housing edge 10R; and b) a step of welding the tab portions 22T to directly and electrically connect the tab portions 22T to each other at a point in time after the arrangement.

[0043] In the exemplary embodiment shown, the battery pack 1 includes 10 pouch-type cells 21. In an alternative exemplary embodiment, the battery pack may include at least two pouch-type cells.

[0044] Furthermore, in the exemplary embodiment shown, the pouch-type cells 21 in the stack 20 are arranged in the stack direction z. Furthermore, in the exemplary embodiment shown, the pouch-type cells 21 extend in directions x and y respectively orthogonal to the direction z.

[0045] Furthermore, in the illustrated exemplary embodiment, the cell tab 22 having the tab portion 22T projects in the -y direction orthogonal to the stacking direction.

[0046] Furthermore, in the illustrated exemplary embodiment, in particular in each case, the tab portions 22T of adjacent pouch-type cells 21 are electrically connected to each other directly by one of the welding connections 22S.

[0047] Step b) includes welding the tab portions 22T of adjacent pouch-type cells 21 to directly electrically connect the tab portions 22T of adjacent pouch-type cells 21 to each other, in particular in each case.

[0048] In particular, the pouch-type cells 21 are connected in series, in particular in the stacking direction z.

[0049] Specifically, the common housing opening 10O is the only housing opening for the cell tab 22.

[0050] Furthermore, as shown in FIGS. 5 to 7, the pouch-type cells 21 are configured and arranged such that the cell tabs 22 are arranged in a stack 20 shape within the stack housing 10 on the common tab surface 20V of the stack 20, in particular on the front surface, and in particular in the common housing opening 10O.

[0051] Step a) includes arranging the pouch-type cells 21 such that the cell tabs 22 are arranged on the common tab surface 20V of the stack 20.

[0052] Furthermore, the housing edge 10R defines an opening surface 10E of the housing opening 10O, in particular an opening surface 10E parallel to the tab surface 20V. The tab portion 22T extends parallel to the opening surface 10E.

[0053] In the illustrated exemplary embodiment, in particular in each case, the tab portions 22T of adjacent pouch-type cells 21 cover or overlap each other, in particular in the stacking direction z.

[0054] Furthermore, as shown in FIG. 8, step b) includes arranging the welding base 150, in particular the welding anvil, at least partially between at least one of the tab portions 22T extending in parallel and the edge portion 10RA, in particular the edge portion 10RA parallel to the tab portion 22T, and welding the tab portion 22T using the welding base 150.

[0055] In the illustrated exemplary embodiment, the tab portion 22T is a portion of the cell tab 22, in particular the portion of the cell tab 22 bent from the direction -y to the directions z and -z, and in particular in each case projects beyond the adjacent edge portion 10RA at the extension of the bending axis of the cell tab 22.

[0056] Furthermore, the battery pack 1 has at least one power connector 29, and in the illustrated exemplary embodiment, has two power connectors 29. The power connector 29 is electrically connected, in particular directly, to one of the tab portions 22T by a welding connection 29S.

[0057] Step a) includes arranging at least one power connector 29 on the tab portion 22T, in particular at a time point after the arrangement of the pouch-type cell 21. Step b) includes welding at least one power connector 29 to the tab portion 22T in order to electrically connect the power connector 29 to the tab portion 22T, in particular directly electrically connect.

[0058] In the illustrated exemplary embodiment, the power connector 29 is arranged at least partially between the tab portions 22T extending in parallel and the edge portion 10RA, in particular the edge portion 10RA parallel to the tab portion 22T.

[0059] Furthermore, the stack housing 10 is in the shape of a rectangular parallelepiped and has at least four, five in the illustrated exemplary embodiment, housing walls 13, 14, 15, 16, 17. As shown in FIG. 6, the wall edges 13R, 14R, 15R, 16R of the four housing walls 13, 14, 15, 16 define the structure opening 10O, particularly on the circumferential surface.

[0060] In particular, one of the four housing walls is the first housing wall 13. In particular, another one of the four housing walls is the second housing wall 14.

[0061] The second housing wall 14 is arranged at a distance 10A on the opposite side of the first housing wall 13. The stack 20 is arranged between the first housing wall 13 and the second housing wall 14. The height 20H of the stack 20 in the stack direction z is limited by the first housing wall 13 and the second housing wall 14.

[0062] Specifically, the stack housing 10 has a first housing part 11 as shown in FIG. 3 and a second housing part 12 as shown in FIG. 6. The first housing part 11 has the first housing wall 13. The second housing part 12 has the second housing wall 14. Furthermore, as shown in FIG. 7, the first housing part 11 and the second housing part 12 are mechanically, particularly directly, connected to each other by at least one welded connection part 10S.

[0063] Step a) involves placing stack 20 on the first housing wall 13, and at a later point, placing the second housing wall 14 on stack 20 such that the second housing wall 14 is arranged on the opposite side of the first housing wall 13 with a distance 10A therebetween. Stack 20 is arranged between the first housing wall 13 and the second housing wall 14, and the height 20H of stack 20 in the stack direction z is restricted by the first housing wall 13 and the second housing wall 14. Step b) involves welding the first housing part 13 and the second housing part 14 to mechanically connect them to each other, especially directly.

[0064] In the illustrated exemplary embodiment, the first housing part 11 has a first housing wall or upper surface wall 13, a housing wall 15, especially a peripheral wall, and a housing wall 17, especially a rear wall. The second housing part 12 has a second housing wall or bottom surface wall 14, and a housing wall 16, especially a peripheral wall.

[0065] Furthermore, in the illustrated exemplary embodiment, the first housing wall 13 and the second housing wall 14 each extend in directions x, y orthogonal to the stack direction z. Furthermore, in the illustrated exemplary embodiment, the distance 10A is in the stack direction z. Furthermore, in the illustrated exemplary embodiment, the height 20H is equal to the distance 10A.

[0066] Furthermore, as illustrated in FIGS. 4 to 6, the battery pack 1 comprises at least one compensation element 60. The at least one compensation element 60 is arranged in stack 20. Furthermore, the at least one compensation element 60 extends over a majority of the surface 21F of the pouch-type cell 21 and is configured to adjust, especially match, the height 20 of stack 20 to the distance 10A between the first housing wall 13 and the second housing wall 14 over the compensation thickness 60D of the at least one compensation element 60, and to cushion, especially buffer, the expansion of the pouch-type cell 21 in the stack direction z, if present.

[0067] In the illustrated exemplary embodiment, the battery pack 1 includes five compensation elements 60. In an alternative exemplary embodiment, the battery pack may include only a single compensation element.

[0068] In particular, two pouch cells 21 are each disposed between two compensation elements 60. Thereby, the plurality of cell tabs 22 can be made equal, in particular the plurality of tab portions 22 can have the same length in the stack direction z.

[0069] Furthermore, in the illustrated exemplary embodiment, at least one compensation element 60 extends in directions x, y orthogonal to the stack direction z. Furthermore, in the illustrated exemplary embodiment, at least one compensation element 60 extends across the entire surface 21F of the pouch cell 21.

[0070] Furthermore, in the illustrated exemplary embodiment, at least one compensation element 60 is a heat insulating material.

[0071] Furthermore, the pouch cells 21 are configured and arranged in a stack 20 such that the cell tabs 22 are arranged in two tab rows 22a, 22b as illustrated in FIGS. 5 to 7.

[0072] The edges 22aL, 22bR of the tab rows 22a, 22b facing opposite sides define an intermediate region 22Z. The battery pack 1 includes a circuit board 52. The circuit board 52 is disposed within the intermediate region 22Z and is electrically connected to a number of cell tabs 22, in particular tab portions 22T, by welding connections 52S in each case.

[0073] Step a) comprises configuring the pouch-type cell 21 such that the cell tabs 22 are arranged in two tab columns 22a, 22b, and arranging the pouch-type cell 21 in a stack 20 such that the edges 22aL, 22bR facing away from each other of the tab columns 22a, 22b define an intermediate region 22Z. The circuit board 52 is arranged within the intermediate region 22Z, in particular at a point in time after the arrangement of the pouch-type cell 21. Step b) comprises welding the circuit board 52 to a number of cell tabs 22, in particular tab portions 22T, in order to electrically connect the circuit board 52 to the cell tabs 22, in particular the tab portions 22T, in each case specifically.

[0074] In the exemplary embodiment shown, the tab columns 22a, 22b are in the stacking direction z or extend in the stacking direction z. Furthermore, in the exemplary embodiment shown, the edges 22aL, 22bR facing away from each other of the tab columns 22a, 22b define or delimit the intermediate region 22Z in a direction x, -x orthogonal to the stacking direction z.

[0075] Furthermore, in the exemplary embodiment shown, the circuit board 52 is arranged between the tab columns 22a, 22b, in particular between the opposing edges 22aR, 22bL of the tab columns 22a, 22b. Furthermore, in the exemplary embodiment shown, the circuit board 52 is arranged on the tab side 20V, in particular on the front side, on the stack 20 and on the housing opening 10O.

[0076] Specifically, the battery pack 1 comprises a frame 59. The frame 59 supports the circuit board 52 and is arranged in the housing opening 10O. The cell tabs 22, in particular the tab portions 22T, and the circuit board 52 are positioned relative to each other by the stack housing 10 and the frame 59.

[0077] Step a) comprises arranging the frame 59 in the structural opening 10O such that the cell tabs 22, in particular the tab portions 22T and the circuit board 52, are positioned relative to each other by the stack housing 10 and the frame 59, in particular at a point in time after the arrangement of the pouch-type cell 21.

[0078] In the exemplary embodiment shown, the cell tab 22, particularly the tab portion 22T, is disposed in the housing opening 10O.

[0079] Furthermore, in the exemplary embodiment shown, the circuit board 52 is disposed with the board surface 52E parallel to the tab side surface 20V. In particular, the board surface 52E corresponds to the tab surface 22E defined by the tab rows 22a, 22b, particularly the tab portions 22T extending in parallel.

[0080] Furthermore, in the exemplary embodiment shown, the circuit board 52 holds the measuring electronic device 55. The measuring electronic device 55 is configured to measure the voltage SP of the pouch-type cell 21.

[0081] Furthermore, in the exemplary embodiment shown, the electrical connection portions 52eV', particularly the electrical cell connectors 52eV'', between the circuit board 52, particularly the measuring electronic device 55, and the numerous cell tabs 22, particularly the tab portions 22T, are identical and particularly short.

[0082] Furthermore, in the exemplary embodiment shown, the circuit board 52, particularly the measuring electronic device 55, is electrically connected to the numerous cell tabs 22, particularly the tab portions 22T, by the electrical cell connectors 52eV'' and particularly by the welding connection portions 52S.

[0083] Step b) includes, particularly in each case, welding the electrical cell connectors 52eV'' to the numerous cell tabs 22, particularly the tab portions 22T, in order to electrically connect the electrical cell connectors 52eV'' to the cell tabs 22.

[0084] Furthermore, in the exemplary embodiment shown, the cell connector 52eV'' is non-flexible.

[0085] In particular, the cell connector 52eV'' is connected, in particular mechanically, at each end to the circuit board 52 at a point in time before step a). Thus, the cell connector 52eV'' has its other end positioned on the cell tab 22, in particular on the tab portion 22T, at a point in time after step a) and before step b).

[0086] Furthermore, in the exemplary embodiment shown, the cell connector 52eV'' projects beyond the substrate edge 52R of at least one of the circuit boards 52 at least at one of the edges 22aL, 22bR of the tab rows 22a, 22b in a direction x, -x that is orthogonal to the stack direction z, in particular in each case.

[0087] Furthermore, in the exemplary embodiment shown, the cell connector 52eV'' is arranged spaced apart from the tab portion 22T, in particular from a plurality of tab portions 22T, of the stack 20 or the outer shell of the pouch-type cell 21.

[0088] Furthermore, in the exemplary embodiment shown, as illustrated in FIG. 9, the battery pack 1 comprises a further circuit board 53. The further circuit board 53 is arranged spaced apart from the circuit board 52 from the stack 20 and, in particular, with a further substrate surface 53E parallel to the tab surface 20V, in particular on the tab surface 20V, in particular on the front side.

[0089] The further circuit board 53 is wider than the tab rows 22a, 22b.

[0090] Furthermore, the further circuit board 53 holds the power electronics device 56. The power electronics device 56 is configured to control, in particular automatically control, in particular stop, the output of the driving force AL from the battery pack 1 and / or the input of the charging power LL to the battery pack 1, in particular in response to the measured voltage SP.

[0091] In the exemplary embodiment shown, the width of the further circuit board 53 corresponds, in particular is identical, to the width of the stack 20 in a direction x that is orthogonal to the stack direction z.

[0092] Furthermore, in the illustrated exemplary embodiments, the frame 59 and / or the circuit board 52 supports a further circuit board 53.

[0093] Furthermore, in the illustrated exemplary embodiments, a further circuit board 53, particularly the power electronics device 56, is electrically connected to the circuit board 52, particularly the measurement electronics device 55.

[0094] Furthermore, in the illustrated exemplary embodiments, a further circuit board 53, particularly the power electronics device 56, is electrically connected to at least one power connector 29.

[0095] In particular, the circuit board 52, particularly the measurement electronics device 55, is electrically connected to all of the cell tabs 22 except for the ground (GND) cell tab 22 at a cell potential of 0 and the nominal voltage (NSP) cell tab 22 of the battery pack 1 at a cell potential of 10 by an electrical cell connector 52eV''. The circuit board 52, particularly the measurement electronics device 55, is electrically connected to the ground cell tab 22 and the nominal voltage NSP cell tab 22 by the power connector 29 and the further circuit board 53. In alternative embodiments, the circuit board, particularly the measurement electronics device, may be electrically connected to the ground cell tab and / or the nominal voltage cell tab by an electrical cell connector, particularly in each case.

[0096] Furthermore, as illustrated in FIG. 11, in the illustrated exemplary embodiments, the battery pack 1 includes 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 an electrical driving force AL from the battery pack 1 to the processing device 101. Furthermore, a further circuit board 53, particularly the power electronics device 56, is electrically connected to the battery pack contacts 71.

[0097] In particular, the battery pack contact 71 is arranged on the tab surface 20V of the stack 20, in particular on the back 20R of the stack 20 opposite the front, in particular on the stack housing 10, and in particular on the housing wall or back wall 17.

[0098] Furthermore, in the illustrated exemplary embodiment, as shown in FIG. 10, the battery pack 1 comprises a further circuit board 54, in particular yet another further circuit board 54. The further circuit board 54, in particular yet another further circuit board 54, is spaced apart from the stack 20, further from the circuit board 52, and in particular further from the further circuit board 53, and is arranged parallel to the tab surface 20V, in particular on the front, with a particular further substrate surface 54E, in particular yet another further substrate surface. The further circuit board 54, in particular yet another further circuit board 54, holds the user electronic interface device 57 and the electronic transmitter 58. The user electronic interface device 57 is configured to communicate with the user, in particular for automatic communication. The electronic transmitter 58 is configured to wirelessly transmit, in particular automatically wirelessly transmit, at least one operating parameter and / or operating state.

[0099] In the illustrated exemplary embodiment, the electronic interface device 57 is configured to output, in particular display, the charge state of the battery pack 1.

[0100] Furthermore, in the illustrated exemplary embodiment, the further circuit board 53 supports the further circuit board 54, in particular yet another further circuit board 54.

[0101] Furthermore, in the illustrated exemplary embodiment, the further circuit board 54, in particular yet another further circuit board 54, in particular the user electronic interface device 57, and the electronic transmitter 58 are electrically connected to the circuit board 52, in particular the measurement electronic device 55, and / or the further circuit board 53, in particular the power electronics device 56.

[0102] Furthermore, in the illustrated exemplary embodiments, the circuit board 52, and in particular at least one further circuit board 53, 54, each have, in particular in each case, recesses 52O, 53O, 54O, in particular through-holes. As illustrated in FIG. 14, the recesses 52O, 53O, 54O are configured to allow the sensor line 30L to pass through for the flow of the casting material 99 and / or to position the circuit boards 52, in particular the circuit boards 52, 53, 54 relative to one another.

[0103] In the illustrated exemplary embodiments, as illustrated in FIG. 4, the battery pack 1 has a pressure sensor 31. The pressure sensor 31 is configured to detect, in particular measure, a pressing force acting in the stack direction z on the pouch-type cell 21. Furthermore, the battery pack 1 has an internal temperature sensor 36. The internal temperature sensor 36 is configured to measure the internal temperature of the stack 20. The sensor line 30L is from the pressure sensor 31 and the internal temperature sensor 36. The circuit board 52, in particular the measuring electronics 55, is electrically connected to the pressure sensor 31 and the internal temperature sensor 36 by the sensor line 30L.

[0104] Furthermore, in the illustrated exemplary embodiments, as illustrated in FIGS. 11 and 12, the battery pack 1 has an external temperature sensor 37. The external temperature sensor 37 is configured to measure the external temperature of the stack 20. The circuit board 52, in particular the measuring electronics 55, is electrically connected to the temperature sensor 37.

[0105] Furthermore, in the illustrated exemplary embodiments, the power electronics device 56 is configured to control the output of the driving force AL from the battery pack 1 and / or the input of the charging power LL to the battery pack 1 in response to the detected, in particular measured, pressing force, the measured internal temperature, and the measured external temperature.

[0106] Furthermore, in the illustrated exemplary embodiments, the cell tab 22 and at least one of the circuit boards 52, 53, 54 are enclosed, in particular within a common casting block 98 and in particular by a thermally conductive casting material 99. The casting material 99 reaches up to the outer shell of the pouch-type cell 21.

[0107] Furthermore, in the illustrated exemplary embodiments, as illustrated in FIGS. 13 and 14, the battery pack 1 comprises a battery pack housing 80. The pouch-type cell 21, and in particular the circuit board 52, the measuring electronics 55, the electrical cell connector 52eV'', at least one power connector 29, the stack housing 10, the frame 59, a further circuit board 53, the power electronics 56, a further circuit board 54, in particular yet another further circuit board 54, the user electronic interface device 57, the electronic transmitter 58, the pressure sensor 31, the internal temperature sensor 36, the external temperature sensor 37, and the casting material 99 are arranged within the battery pack housing 80.

[0108] In particular, the battery pack housing 80 is configured as a mold for the casting material 99.

[0109] Furthermore, in the illustrated exemplary embodiments, the battery pack 1 comprises at least one air cooling circuit 90 within the battery pack housing 80, the at least one air cooling circuit 90 including a plurality of air inlets 91 and a plurality of air outlets 92 for a cooling air flow LS. The cooling air flow LS passes through the pouch-type cell 21, in particular from the plurality of air inlets 91 on the stack housing 10 to the plurality of air outlets 92, in order to cool the pouch-type cell 21. The external temperature sensor 37 is arranged within the air cooling circuit 90, in particular facing the plurality of air inlets 91 and / or the plurality of air outlets 92, between the plurality of air inlets 91 and the plurality of air outlets 92.

[0110] Furthermore, in the illustrated exemplary embodiments, the stack housing 10 has a thermally conductive connection to the pouch-type cell 21.

[0111] 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 conduction paste is provided between the pouch-type cell 21 and the housing walls 15, 16, 17.

[0112] Furthermore, in the illustrated exemplary embodiment, 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.

[0113] Furthermore, in the illustrated exemplary embodiment, the battery pack 1 has a nominal voltage NSP of 36 V. In alternative exemplary embodiments, the battery pack may have a nominal voltage of at least 10 V and / or at most 100 V.

[0114] 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.

[0115] 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.

[0116] Furthermore, in the illustrated exemplary embodiment, the battery pack 1 has a height 1H of 5 cm, in particular in the stack direction z, a width 1B of 10 cm, in particular in the direction x, and a depth 1T of 15 cm, in particular in the direction y. 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.

[0117] 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, and in particular, are electrically connected, in order to supply the electric driving force AL from the battery pack 1 to the processing device 101.

[0118] Specifically, the processing device 101 has a battery housing portion 102. The battery housing portion 102 is configured to house the battery pack 1. In particular, the battery pack 1 is housed.

[0119] In the example 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, pruning shears, 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.

[0120] 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, a processing system including such a battery pack and an electric processing device, and a method of manufacturing a battery pack for supplying an electric driving force to an electric processing device, each of the battery pack and the method having improved characteristics.

Claims

[Claim 1] A battery pack (1) for supplying an electric driving force (AL) to an electrically-driven processing device (101), the battery pack (1) comprising: A stack housing (10); A plurality of pouch-type cells (21); Equipped with The stack housing (10) has a common housing opening (10O) defined by a housing edge (10R); the pouch-type cells (21) have cell tabs (22), the pouch-type cells (21) are configured and arranged in a stack (20) in the stack housing (10) such that the cell tabs (22) having at least a tab portion (22T) at the common housing opening (10O) protrude beyond at least one edge portion (10RA) of the housing edge (10R), and the tab portions (22T) are directly electrically connected to each other by a welded connection (22S); Battery pack (1).

Images