WO2021254847A1

WO2021254847A1 - Battery module, method for the production thereof and use thereof

Info

Publication number: WO2021254847A1
Application number: PCT/EP2021/065474
Authority: WO
Inventors: Daniel Manka; Andy Tiefenbach; Andreas Gleiter
Original assignee: Robert Bosch Gmbh
Priority date: 2020-06-19
Filing date: 2021-06-09
Publication date: 2021-12-23
Also published as: TW202211531A; DE102020207631A1; EP4169102A1; JP2023530008A

Abstract

The invention relates to a battery module comprising a plurality of cylindrical battery cells (2) and a first housing element (31) with a plurality of cylindrical first receiving means (41) in which a first plurality (21) of electrically series- and/or parallel-connected battery cells (2) are accommodated, and a second housing element (32) with a plurality of cylindrical second receiving means (42) in which a second plurality (22) of electrically series- and/or parallel connected battery cells (2) are accommodated, wherein the first housing element (31) has a first main body (51) on which the first receiving means (41) are arranged, and the second housing element (32) has a second main body (52) on which the second receiving means (42) are arranged, wherein the first main body (51) and the second main body (52) are connected to one another, forming a receiving space (6) in which cell connectors (7) are accommodated to form an electrical series and/or parallel connection between the first plurality (21) of battery cells (2) and the second plurality (22) of battery cells (2), wherein the first housing element (31) has a third receiving means (43) which is arranged on the first main body (51) and in which a control unit (10) of the battery module (1) is accommodated.

Description

description

title

Battery module, method of manufacturing such and use of such

State of the art

The invention is based on a battery module with a plurality of cylindrically designed battery cells according to the preamble of the independent claim. The present invention also relates to a method for producing such a battery module and the use of such a battery module.

It is known from the prior art that battery modules can consist of a plurality of individual battery cells, which can be connected to one another in series and / or parallel in an electrically conductive manner, so that the individual battery cells are interconnected to form the battery module.

Furthermore, such battery modules are interconnected to form batteries or entire battery systems.

In particular for light electrically powered vehicles, also known as light electric vehicles (LEVs), comparably light and preferably scalable battery systems are to be designed. A large number of comparably small and usually cylindrical battery cells can be interconnected to form the battery module or the battery.

Control units, which are also known as battery management systems (BMS), are usually used to monitor the battery cells of a battery module. These are used, for example, for a voltage measurement or temperature measurement with sensors arranged on the battery cells connected. Such control units usually have many connections and are complex to wire. For example, the publications EP 3472877 A1 and US 2014/0234668 each open a battery module with a plurality of battery cells.

Disclosure of the invention

A battery module with a plurality of cylindrically designed battery cells with the features of the independent claim offers the advantage that an existing installation space can be used efficiently. In particular, by arranging a control unit in a third receptacle, the height of the battery module can be reduced. Furthermore, there is no need for complex cabling, for example by means of cable harnesses.

For this purpose, a battery module with a plurality of cylindrically shaped battery cells is made available. In particular, the battery cells are designed as lithium-ion battery cells.

The battery module comprises a first housing element which has a plurality of cylindrical first receptacles. A first plurality of battery cells is received in the first recording, which are electrically conductively connected in series and / or in parallel with one another.

The battery module comprises a second housing element which has a plurality of cylindrically designed second receptacles. In the second recording, a second plurality of battery cells is included, which are electrically conductively connected in series and / or in parallel with one another.

Furthermore, the first housing element comprises a first base body on which the first receptacles are arranged, and the second housing element comprises a second base body on which the second receptacles are arranged.

The first base body and the second base body are connected to one another to form a receiving space. In the receiving space, cell connectors are arranged to form an electrically conductive serial and / or parallel interconnection of the first plurality of battery cells and the second plurality of battery cells. The first housing element also has a third receptacle which is arranged on the first base body. A control unit of the battery module is received in the third receptacle.

The measures listed in the dependent claims allow advantageous developments and improvements of the device specified in the independent claim.

An embodiment of the battery module according to the invention offers the particular advantage that the cylindrical battery cells can be received directly by the first housing element or the second housing element and thus, for example, additional cell holder elements can be dispensed with. At this point it should be noted that the first housing element and the second housing element can in particular also be referred to as half-shells of a housing of the battery module, which together form the housing.

At this point it should be noted that cylindrical battery cells can also be referred to as round cells. Cylindrical battery cells essentially have a cylindrical jacket surface with a circular cross-sectional area, which is closed off on its two opposite sides by a circular base or cover surface. Particularly preferred are the cylindrical battery cells, which, for example, do not have a casing made of plastic and which, for example, comprise an electrically conductive housing made of a metallic material, each round cells of type 18650 or type 21700, which have a diameter of approx mm and a height of approx. 65 mm or a diameter of approx. 21 mm and a height of approx. 70 mm. The housing of the cylindrically designed battery cells is usually negatively charged and forms the negative voltage from the respective battery cell. Furthermore, the positive voltage tap of the battery cell is arranged on a cover surface, which is electrically isolated from the housing and thus the negative voltage tap.

Overall, an electrical interconnection of the first plurality of battery cells and the second plurality of battery cells can be formed, where- in which the cell connectors can be arranged within the first base body or the second base body. Furthermore, the cell connectors are arranged between the first plurality of battery cells and the second plurality of battery cells. Furthermore, a control unit of the battery module is included in the receptacle. The control unit of the battery module is in particular a battery management system (BMS).

Cylindrical recordings are at this point each hollow body, which are at least partially limited by a cylindrical outer surface with a circular cross-sectional area. Furthermore, the cylindrical receptacles have a bottom surface which also limits the cylindrical receptacle on a bottom side if. On the side opposite the bottom side, the cylindrical hollow body has an opening through which a battery cell can be inserted into the receptacle. At this point it should be noted that the battery cells can be accommodated directly in the respective receptacle, for example without the arrangement of an insulating layer, such as air.

In particular, exactly one battery cell is recorded in each recording.

An arrangement of a receptacle on a base body of a housing element should be understood to mean that the receptacle is, for example, integrally connected to the base body, the base body having an opening which corresponds to the opening of the cylindrical hollow body of the receptacle. A battery cell can thus be inserted into the respective receptacle through the opening in the base body or the opening in the receptacle. The, for example, circular cross-sectional area of a battery cell is preferably arranged in direct contact with the respective circular cross-sectional area of the cylindrical hollow body of the receptacle. In addition, a material connection between the housing of the respective battery cell and the receptacle is particularly advantageous. This material connection of this type can be implemented, for example, by adhesives or pastes and can form an optimal thermal connection between the respective battery cell and the respective receptacle. According to a preferred aspect of the invention, the first base body and the second base body are positively connected to one another. Such connec tions can be formed in a particularly simple manner. Of course, it is also possible for the first base body and the second base body to be non-positively and in particular non-positively and positively connected to one another. For example, such a connection can also be formed by means of screwing. It is also possible to materially connect the first base body and the second base body to one another. Such a cohesive connection can be formed, for example, by means of plastic welding of the polymeric materials.

The first base body and the second base body are particularly preferably connected to one another by means of a folded joint. It is particularly preferred here if the folded seam connection is formed circumferentially over the entire connection between the first base body and the second base body. For this purpose, for example, the first base body can have a first rebate element and the second base body can have a second rebate element, which can be connected positively or positively and non-positively by means of a corresponding fold connection. For this purpose, for example, the first folding element can be inserted into the second folding element to form a Falzver connection. To form a particularly reliable connection, the first folding element and / or the second folding element can still be deformed after the insertion.

Overall, it is thereby possible to form a tightly formed connection between the first housing element and the second housing element, which, for example, it can also meet corresponding standards with regard to tightness. In particular, the first rebate element and / or the second rebate element could for this purpose comprise a corresponding sealing element in order to be able to increase the tightness even further. For example, the sealing element can be integrated into the folding element.

Particularly preferably, such a rabbet connection can also form at least one guide rail at the same time, which is designed to hold the battery to include the belt module in a vehicle. As a result, a comparably simple introduction of the battery into a vehicle can be made available, the folded seam connection still being able to provide a reliable fixation of the battery in the vehicle. Overall, the battery of a vehicle can thus be changed in a simple manner.

Furthermore, it is also possible for a handle or a handle to be integrated into the folded joint. The handle or the handle can also be designed as a holding band or a carrying strap. The rabbet connection can also be designed, for example, in such a way that a handle or a handle can be plugged in in a simple manner or that a retaining strap or a carrying strap can be arranged in a simple manner. In particular, the tightness is not impaired.

The battery module advantageously comprises an electronic connection integrated into the first base body and / or the second base body. The electronic connection is designed to contact the control unit of the battery module. The electronic connection is technically connected to the control unit of the battery module. This offers the advantage that electrical or electronic lines can be reduced in such a way that, for example, only the electronic connection has to be connected to the control unit of the battery module. In particular, the electronic connection is designed as a plug connection.

According to a preferred aspect of the invention, the battery module comprises an electrical connection. The electrical connection is integrated in the first base body and / or in the second base body. In particular, the electrical connection is designed to tap a voltage from the battery module or to be able to electrically charge the plurality of battery cells. The battery module particularly preferably comprises two electrical connections, such as, for example, a positive electrical connection and a negative electrical connection. In particular, the electrical connection or the electrical connections are each designed as a plug connection. As a result, it is overall possible to electrically connect the battery module to a vehicle, for example. The advantage of a plug connection is one particularly easy connection. At this point it should also be noted that the electrical connection can preferably be integrated into the folded seam connection in such a way that the folded seam connection is designed with a greater width at the point of the electrical connection.

It should be noted that the insertion direction of a battery module in a vehicle preferably also determines the insertion direction. A training is advantageous in which the final arrangement of the electronic connection does not have to be determined until the end of the assembly process. As a result, the design of the battery module can be better adapted to a wide variety of vehicle types without changing the design, since different insertion directions are possible with one design.

Particularly preferably, the electrical connection and / or the electronic connection is arranged on one side of the first base body and / or the second base body, which is disposed perpendicular to a folded joint formed as a guide rail. In this way, a particularly reliable connection to a vehicle or a charger can be established.

Advantageously, the first plurality of battery cells is interconnected in parallel with one another in parallel first strings in the direction of a longest extension of the first base body and the second plurality of battery cells is interconnected in parallel with one another in parallel second strings in the direction of a longest extension of the second base body. For this purpose, the first plurality of battery cells or the second plurality of battery cells is arranged, for example, in such a way that the battery cells of a parallel first strand or a parallel second strand are immediately adjacent in the direction of a longest extension of the first base body or the second base body zueinan which are arranged, wherein the longitudinal directions of the battery cells are all arranged in the same plane. The plurality of parallel first strands or the plurality of parallel second strands are arranged next to one another in a shortest extent of the first base body or the second base body arranged perpendicular to the longest extent of the first base body or the longest extent of the second base body. The control unit is designed to monitor the parallel first strands and the parallel second strands.

The number of parallel second strands can be at least one greater than the number of parallel first strands. As a result, the third receptacle, in which the control unit is received, can be arranged instead of at least one parallel first strand. The number of parallel second strands is preferably one higher than the number of parallel first strands.

The number of battery cells in a second parallel string can be at least one greater than the number of battery cells in a first parallel string. As a result, the third receptacle, in which the control unit is accommodated, can be arranged instead of at least one battery cell connected in parallel in each parallel first strand. The number of battery cells of a second parallel string is preferably one higher than the number of battery cells of a first parallel string.

For example, seven second parallel strands and six first parallel strands can be formed. As a result, what is known as a 13s interconnection can be formed. The first plurality of battery cells and the second plurality of battery cells can in particular also be interconnected electrically in series and / or in parallel.

It is particularly advantageous if the battery module comprises at least one first sensor element which is designed to detect a state variable of a battery cell of the first plurality of battery cells and / or the battery module comprises at least a second sensor element which is designed to have a To detect the state variable of a battery cell of the second plurality of battery cells. A state variable of a battery cell can be, for example, a temperature, a voltage or an aging state.

The first sensor element and / or the second sensor element can be electrically and mechanically connected to a first clamp connection or a second clamp connection, which are connected to the first housing element and / or the second housing element. This also makes it possible borrowed to mechanically fix the control unit of the battery module in the battery module.

Furthermore, the at least one first sensor element or the at least one second sensor element is connected in terms of control technology to the control unit of the battery module.

According to a preferred aspect of the invention, a further control unit of the battery module is arranged in the receiving space. The control unit and the further control unit are connected to one another in terms of control technology. This makes it possible to separate functions for monitoring the battery module and, in other words, to provide a two-part design of the control unit. For example, the further control unit can be designed to detect the voltage and the temperature of the battery cells of the first plurality of battery cells and the second plurality of battery cells.

The arrangement of the further control unit of the battery module can in particular be based on the first housing element and / or the second housing element. In particular, the further control unit of the battery module extends essentially over the entire length of the shortest extent of the first base body or the shortest extent of the second base body. This makes it possible to monitor all parallel first strings and all parallel second strings.

In particular, the extension of the further control unit of the battery module over the longest extension of the first base body or the longest extension of the second base body can be adapted to the monitoring requirements in accordance with the requirements.

In other words, this means that the size of the further control unit of the battery module can be selected as a function of the desired functions. The front-end chip (ASIC), for example, can be arranged on the further control unit. Recorded measured values can be transmitted to the pC via a signal line. The functional groups of the current detection, such as the shunt sensor, and the shutdown path, such as. For example, a solid state relay (SSR) can be formed on the control unit.

It is particularly expedient for the first sensor element to be arranged on the further control unit and to be connected to a cell connector that electrically connects two battery cells of the first plurality of battery cells.

The second sensor element is particularly expediently arranged on the further control unit and connected to a cell connector that electrically connects two battery cells of the second plurality of battery cells.

The first sensor element is therefore preferably connected to a cell connector which electrically conductively connects two battery cells of the first plurality of battery cells, and the second sensor element is therefore connected to a cell connector which electrically conductively connects two battery cells of the second plurality of battery cells. The first sensor element and / or the second sensor element can preferably be soldered as a spring contact pin on a circuit board of the further control unit of the battery module and form direct mechanical and electrical contacting of the cell connectors.

In particular, the voltages of a first parallel strand or a second parallel strand can thereby be detected.

For example, the cell connectors could each also include at least one shaft which is arranged between the respective connection areas. Furthermore, the first sensor element or the second sensor element could mechanically and electrically contact the at least one shaft of the respective cell connector. In particular, the shaft of the cell connector could also be designed as a spring element which presses against the first sensor element or the second sensor element. At this point it should be noted that advantageously the cylindrically designed jacket surface of each first receptacle of the first housing element and of each second receptacle of the second housing element is arranged so that temperature fluid can flow around it. The temperature control fluid is preferably a temperature control gas, such as air. In other words, this means that the outside of the receptacle, which is arranged opposite an interior of the receptacle in which the respective battery cell is housed, is arranged directly adjacent to an environment. As a result, each battery cell can be passively cooled overall, since the first housing element and the second housing element have a comparably large surface area. In a particularly preferred manner, centrally arranged battery cells can also be reliably temperature-controlled in this way.

At this point it should be noted that a further compensating material can advantageously be arranged between a cylindrical outer surface of a first receptacle of the first housing element and a cylindrical outer surface of a second receptacle of the second housing element. In the case of application forms with lower thermal requirements, for example due to comparably large temperature gradients between the battery cell and the environment, due to low electrical currents or due to the use of battery cells with low internal resistance, the battery cells could therefore only be placed over the circular floor area of the respective location temperature can be controlled. In other words, the temperature control could be over the circular bottom surface of the respective receptacle instead of, for example, additional temperature control over the respective cylindrical jacket. For this purpose, spaces between the cylindrical outer surfaces of the respective receptacle could be filled with a further compensating material. This results in possibilities to make the module mechanically extremely robust, to manufacture it in a simplified manner and to further reduce the distance between two receptacles.

It is useful if the first housing element and the second housing element are formed from a polymer material. For example, the polymer material can be selected as a polyamide (PA), such as PA 66. This makes it possible to minimize the weight of the battery module. Ren and at the same time to provide sufficient mechanical strength. Furthermore, the first housing element and the second housing element can comprise glass fibers, which can for example be embedded in the polymeric material. The first housing element and the second housing element, in particular the plurality of first receptacles and the plurality of second receptacles, preferably have a wall thickness less than 2 mm and in particular 1 mm. The weight of the battery module can thus be reduced with sufficient mechanical strength at the same time in such a way that reliable temperature control of the plurality of cylindrically designed battery cells is also possible.

The first housing element and the second housing element can be formed inexpensively by un ferent manufacturing technologies, such as deep drawing.

It is particularly advantageous if the first plurality of battery cells and the second plurality of battery cells are arranged directly opposite one another. This is to be understood as meaning that the cylindrical battery cells each have a longitudinal direction, the longitudinal directions of the first plurality of battery cells and the longitudinal direction of the second plurality of battery cells being arranged parallel to one another. Furthermore, the longitudinal direction of the first plurality of battery cells and the longitudinal direction of the second plurality of battery cells are also arranged parallel to one another. In particular, the first housing element and the second housing element are also arranged directly opposite one another. The particular advantage of the invention is furthermore that, in addition to a small installation space, an electrical interconnection of the individual battery cells can be implemented by means of comparatively short cell connectors.

The present invention also relates to the use of a battery module according to the invention just described in a light electric vehicle (light electric vehicle; LEV). This means that a thermally optimized and scalable overall concept of a battery module for a lightly electrically powered vehicle (LEV) can be made available. In addition, a method for producing a battery module just described with a plurality of cylindrically shaped battery cells, in particular special lithium-ion battery cells, is the subject of the present invention. In this case, a first base body of a first housing element with a plurality of cylindrically designed first receptacles, in which a first

A plurality of battery cells electrically connected in series and / or parallel to one another is accommodated and with a third receptacle in which a control unit of the battery module is accommodated, and a second base body of a second housing element with a plurality of cylindrically designed second receptacles in which a second plurality of electrically seri ell and / or parallel interconnected battery cells is added to form a receiving space in which cell connectors for an electrically conductive serial and / or parallel interconnection of the first plurality of battery cells and the second plurality of battery cells are accommodated with each other get connected.

Brief description of the drawings

Embodiments of the invention are shown in the drawings and explained in more detail in the description below.

It shows:

FIG. 1 shows an embodiment of a battery module according to the invention in an exploded view,

FIG. 2 shows a further embodiment of a battery module according to the invention in an exploded view and

Figure 3 is a plan view of a further control unit of the battery module.

FIG. 1 shows an embodiment of a battery module 1 according to the invention in an exploded view.

The battery module 1 comprises a plurality of the cylindrically designed battery cells 2, which cannot be seen in FIG. 1, which are designed in particular as lithium-ion battery cells 20.

The battery module 1 has a first housing element 31 and a second housing element 32. The first housing element 31 and the second housing element 32 are made of a polymer material, such as a polyamide.

The first housing element 31 has a plurality of cylindrically formed first receptacles 41 and the second housing element 32 has a plurality of cylindrically formed second receptacles 42. Each first receptacle 41 of the first housing element 31 comprises a cylindrically designed jacket surface 91, all of which are arranged so that temperature control fluid can flow around them. Each second receptacle 42 of the second housing element 32 comprises a cylindrically shaped outer surface 92 which are all arranged so that the temperature control fluid can flow around them. At this point it should be noted that the cylindrical outer surfaces 91 of the first receptacles 41 and the cylindrically shaped outer surfaces 92 of the second receptacles 42 are preferably arranged so that temperature control fluid can flow around them completely, but at least partially. In particular, cylindrical outer surfaces 91 or cylindrical outer surfaces 92 can touch one another.

Furthermore, the first housing element 31 has a third receptacle 43.

The first receptacles 41 take a first plurality 21 of Batteriezel len 2, which are electrically connected in series and / or in parallel with one another. The second receptacles 42 hold a second plurality 22 of battery cells 2, which are electrically connected in series and / or in parallel with one another.

For example, the battery cells 2 can be connected in parallel to one another along the longer sides. The serial connection can be made along a shorter side.

The third receptacle 43 accommodates a control unit 10 of the battery module 1.

The first housing element 31 furthermore comprises a first base body

51, on which the first receptacles 41 and the third receptacle 43 are net angeord.

The second housing element 32 furthermore comprises a second base body

52, on which the second receptacles 52 are arranged.

In particular, the first base body 31 and / or the second base body 32 essentially have a cuboid basic shape.

The first base body 51 and the second base body 52 are involved in the formation of a receiving space 6, which cannot be seen in FIG. connected. The first base body 31 and the second base body 32 are positively connected to one another by means of a folded joint 8. The folded joint 8 is arranged circumferentially on the connection between the first base body 31 and the second base body 32 and seals the battery module 1 from the surroundings of the battery module 1. Cell connectors 7, which also cannot be seen in FIG. 1, can be arranged in the receiving space 6. The cell connectors 7 connect the first plurality 21 of battery cells 2 and the second plurality 22 of battery cells 22 electrically in series and / or in parallel with one another.

In addition, it can be seen from FIG. 1 that the first plurality 21 of battery cells 2 are interconnected in parallel with one another in parallel first strings 171 in the direction of a longest extension 161 of the first base body 31.

In addition, it can also be seen from FIG. 1 that the second plurality 22 of battery cells 2 is interconnected in parallel with one another in parallel second strings 172 in the direction of a longest extension 162 of the second base body 32. The control unit 10 of the battery module 1 is designed to monitor the parallel first strings 171 and / or the parallel second strings 172.

The number of parallel second strands 172 is one higher than the number of parallel first strands 171. The third receptacle 43 is therefore arranged instead of a parallel first strand 171.

Furthermore, the number of battery cells 2 of a second parallel string 172 could instead be one higher than the number of battery cells 2 of a first parallel string 171. The third receptacle 43 would therefore be arranged instead of a parallel battery cell 2 of each parallel first string 171.

The first plurality 21 of battery cells 2 and the second plurality 22 of battery cells 2 are arranged directly opposite one another.

The battery module 1 has one in the first base body 31 and / or Electronic connection 13 integrated in the second base body 32, which is designed to contact the control unit 10 of the battery module 1.

The electronic connection 13 is integrated in the first base body 31 and / or in the second base body 32. In particular, the electronic connection 13 can be designed as a plug. Such a plug can, for example, enable the high-current path to be contacted to the vehicle or charger and can, for example, forward control signals to a control device (not shown).

The battery module 1 comprises an electrical connection 14. The electrical connection 14 is designed to discharge or charge the battery cells 2 of the battery module 1. In particular, the battery module 1 has a first electrical connection 141 and a second electrical connection 142. The first electrical connection 141 can in particular be a positive electrical connection and the second electrical connection 142 can in particular be a negative electrical connection.

By means of the first electrical connection 141, for example, an electrical connection to the battery cells 2 of the first base body 31 can be established, and by means of the second electrical connection 142, for example, an electrical connection to the battery cells 2 of the second base body 32 can be established.

The control device 10 enables the connection between the electronic connection 13 and the battery cells 2 of the first base body 31 or the connection between the electronic connection 13 and the second base body 32 to be separated. A shutdown path is thereby formed.

For this purpose, a plurality of several semiconductors, which cannot be seen in the figures, is preferably arranged on the control unit 10.

Figure 2 shows another embodiment of the invention of a Batteriemo module 1 in an exploded view. In contrast to Figure 1 in the Receiving space 6 another control unit 100 of the battery module 1 is taken. The control unit 10 and the further control unit 100 are connected to one another in terms of control technology.

FIG. 3 shows a plan view of a further control unit 10 of the battery module 1.

The battery module 1 comprises first sensor elements 151 which are designed to each detect a state variable of a battery cell 2 of the first plurality 21 of battery cells 2 and comprises second sensor elements 152 which are designed to each have a state variable of a battery cell 2 of the second plurality 22 to detect battery cells 2.

The first sensor elements 151 and the second sensor elements 152 are connected to the control unit 10 of the battery module 1 in terms of regulation.

The first sensor elements 151 are arranged on the further control unit 100 and are connected to a cell connector 7 that electrically connects two battery cells 2 of the first plurality 21 of battery cells 2. The second sensor elements 152 are arranged on the further control unit 100 and are connected to a cell connector 7 that electrically connects two battery cells 2 of the second plurality 22 of battery cells 2. The front-end chip (ASIC) 17, for example, can be arranged on the further control unit 100. Furthermore, the further control unit 100 has a connection 18 which is designed to connect the further control unit 100 to the control unit 100 in terms of control technology.

Claims

Expectations

1. Battery module with a plurality of cylindrically designed battery cells (2), in particular lithium-ion battery cells (20), and a first housing element (31) with a plurality of cylindrically designed first receptacles (41) in which a first plurality ( 21) is received on battery cells (2) electrically connected in series and / or in parallel, and a second housing element (32) with a plurality of cylindrical second receptacles (42) in which a second plurality (22) of electrically in series and / or battery cells (2) connected in parallel to one another, the first housing element (31) having a first base body (51) on which the first receptacles (41) are arranged, and the second housing element (32) has a second base body (52) ), on which the second receptacles (42) are arranged, the first base body (51) and the second base body (52) forming a receiving space (6), in which

Cell connector (7) to an electrically serial and / or parallel interconnection of the first plurality (21) of battery cells (2) and the second multitude (22) of battery cells (2) are received, are connected to one another, the first housing element ( 31) has a third receptacle (43) which is arranged on the first base body (51) and in which a control unit (10) of the battery module (1) is accommodated.

2. Battery module according to the preceding claim 1, characterized in that the first base body (31) and the second base body (32) are positively connected to one another.

3. Battery module according to the preceding claim 2, characterized in that the first base body (31) and the second base body (32) are connected to one another by means of a folded joint (8).

4. Battery module according to one of the preceding claims 1 to 3, characterized in that the battery module (1) comprises an in the first base body (31) and / or in the second base body (32) integrated electronic connection (13) which is formed to contact the control unit (10) of the battery module (1).

5. Battery module according to one of the preceding claims 1 to 4, characterized in that the battery module (1) comprises an electrical connection (14, 141, 142) integrated in the first base body (31) and / or in the second base body (32) .

6. Battery module according to one of the preceding claims 1 to 5, characterized in that the first plurality (21) of battery cells (2) in the direction of a longest extension (161) of the first base body (31) parallel to one another in parallel first strands (171 ) is interconnected and the second plurality (22) of battery cells (2) are interconnected in parallel with one another in parallel second strings (172) in the direction of a longest extension (162) of the second base body (32), the control unit (10) of the battery module ( 1) is designed to monitor the parallel first strands (171) and / or the parallel second strands (172), the number of parallel second strands (172) being at least one higher than the number of parallel first strands (171) or the number of battery cells (2) of a second parallel string (172) being added is at least one higher than the number of battery cells (2) of a first parallel string (171).

7. Battery module according to one of the preceding claims 1 to 6, characterized in that the battery module (1) comprises at least one first sensor element (151) which is designed to provide a state variable of a battery cell (2) of the first plurality (21) of battery cells ( 2) and / or the battery module (1) comprises at least one second sensor element (152) which is designed to detect a state variable of a battery cell (2) of the second plurality (22) of battery cells (2), the at least a first sensor element (151) or the at least one second sensor element (152) is connected in terms of control technology to the control unit (10) of the battery module (1).

8. Battery module according to the preceding claim 7, characterized in that the one further control unit (100) is arranged in the receiving space (6) of the battery module (1), the control unit (10) and the further control unit (100) regulating with each other are connected.

9. Battery module according to the preceding claims 7 and 8, characterized in that the first sensor element (151) is arranged on the further control unit (100) and with a two battery cells (2) of the first plurality (21) of battery cells (2) electrically connecting cell connector (7) and / or the second sensor element (152) is arranged on the further control unit (100) and with a cell connector electrically connecting two battery cells (2) of the second plurality (22) of battery cells (2) (7) is connected.

10. Battery module according to one of the preceding claims 1 to 9, the first housing element (31) and the second housing element (32) are formed from a polymeric material.

11. Battery module according to one of the preceding claims 1 to 6, characterized in that the first plurality (21) of battery cells (2) and the second plurality (22) of battery cells (2) are arranged directly opposite one another.

12. Battery module according to one of the preceding claims 1 to 10, characterized in that the control device (10) can separate a connection between the first electrical connection (141) or the second electrical connection (142) and the electronic connection (13).

13. A method for producing a battery module (1) according to one of the preceding claims 1 to 11 with a plurality of cylindrically shaped battery cells (2), in particular lithium-ion battery cells (20), wherein a first base body (51) of a first housing element (31) with a plurality of cylindrically shaped first receptacles (41), in which a first plurality (21) of battery cells (2) electrically connected in series and / or in parallel is received, and with a third receptacle in which a control unit (10) of the battery module (1) is received and a second base body (52) of a second housing element (32) with a plurality of cylindrically shaped second receptacles (42) in which a second plurality (22) of electrically in series and / or battery cells (2) connected in parallel to one another are included, with the formation of a receiving space (6) in which a control unit (10) of the battery module (1) is received, are connected to one another.

14. Use of a battery module (1) according to one of claims 1 to 11 in a light electric vehicle (light electric vehicle).