阅读说明：本技术 电池模块 (Battery module ) 是由 C.沃尔 M.甘斯温德 于 2019-06-05 设计创作，主要内容包括：本发明涉及一种电池模块,其具有多个电池单池(2),所述电池单池分别在第一侧面(21)上形成第一电压分接头(31)并在与该第一侧面(21)对置的第二侧面(22)上形成第二电压分接头(32),其中在电池模块(1)的多个分支路(4)中布置有所述电池单池(2),并且分支路(4)的电池单池(2)在相应的分支路(4)的纵向方向(7)上交替布置。(The invention relates to a battery module having a plurality of battery cells (2) each having a first voltage tap (31) on a first side (21) and a second voltage tap (32) on a second side (22) opposite the first side (21), wherein the battery cells (2) are arranged in a plurality of branches (4) of the battery module (1), and the battery cells (2) of a branch (4) are arranged alternately in the longitudinal direction (7) of the respective branch (4).)

1. A battery module having a plurality of battery cells (2) which each form a first voltage tap (31) on a first side (21) and a second voltage tap (32) on a second side (22) opposite the first side (21), wherein

The battery cells (2) are arranged in a plurality of branch lines (4) of the battery module (1), and

The battery cells (2) of the branch lines (4) are arranged alternately in the longitudinal direction (7) of the respective branch line (4), wherein

The battery module (1) comprises two first branch lines (41, 43) with cell connectors (8) of T-shaped configuration, which electrically connect the battery cells (2) of the respective first branch line (41, 43) in series with one another and which electrically connect the battery cells to one another

The battery module (1) comprises at least one second branch (42) having a cell connector (9) of cruciform configuration, which electrically conductively connects the battery cells (2) of the at least one second branch (42) in series with one another, wherein

The T-shaped cell connectors (8) of the first branching arms (41, 43) are each also connected in an electrically conductive manner to one of the cross-shaped cell connectors (9) of at least one second branching arm (42) in a parallel connection of the branching arms (4) to one another.

2. The battery module according to claim 1,

It is characterized in that the preparation method is characterized in that,

The battery cells (2) are each designed as a round cell (20).

3. The battery module according to any one of the preceding claims 1 to 2,

It is characterized in that the preparation method is characterized in that,

the battery cells (2) of the branch lines (4) are respectively accommodated in a branch line housing (6).

4. The battery module according to claim 3,

It is characterized in that the preparation method is characterized in that,

A cell connector (8) of T-shaped design or a cell connector (9) of cross-shaped design is accommodated in a respective branch housing (6) of the first branch (41) or of the second branch (42).

5. The battery module according to any one of the preceding claims 3 to 4,

It is characterized in that the preparation method is characterized in that,

The branch housings (6) arranged adjacent to one another are connected to one another in a form-fitting manner.

6. The battery module according to any one of the preceding claims 1 to 5,

it is characterized in that the preparation method is characterized in that,

The cell connectors (8) of the first type of first branch (41) and of the second type of first branch (43) are arranged in a mirror-symmetrical manner with respect to one another.

7. The battery module according to any one of the preceding claims 1 to 6,

It is characterized in that the preparation method is characterized in that,

the first branch (41, 43) also has at least one end-arranged single-cell connector (11) of L-shaped configuration, wherein in particular,

The cell connectors (11) of L-shaped configuration are arranged on opposite sides in the longitudinal direction (71, 73) of the respective first branching path (41, 43).

8. the battery module according to any one of the preceding claims 1 to 7,

It is characterized in that the preparation method is characterized in that,

The at least one second branching (42) also has at least one uniwell connector (12) of T-shaped configuration arranged in a terminal manner, wherein in particular,

The cell connectors (12) are arranged on opposite sides of the at least one second branch (42) in the longitudinal direction (20).

9. The battery module according to any one of the preceding claims 1 to 8,

It is characterized in that the preparation method is characterized in that,

The battery module (1) has a plurality of second branching arms (42).

Technical Field

The invention relates to a battery module of the type according to the independent claim.

Background

Battery-operated motor vehicles (electric vehicles) usually have a battery which is composed of a plurality of battery modules which are connected to one another in an electrically conductive manner.

The battery modules can be electrically connected to one another in series and/or in parallel in order to meet the respective requirements set for the battery modules.

In this case, such a battery module also consists of individual battery cells which are electrically connected to one another in series and/or in parallel.

The requirements placed on such batteries of electric vehicles may be, for example, the construction space available in such vehicles and the required power or the required energy form.

The battery of a battery-operated motor vehicle can generally have an operating voltage in the high-voltage range of approximately 380 volts, the battery modules being connected electrically in series with one another.

Such a battery may for example consist of 104 lithium-ion battery cells connected in series with one another.

Furthermore, the batteries in smaller electric vehicles and electric vehicles (elektrolers) may also have an operating voltage in the low voltage range of approximately 48 to 60 volts, wherein the battery modules are electrically connected in parallel to one another here.

Such a battery may for example consist of 13 lithium-ion battery cells connected to one another in series.

The number of battery modules used is adapted to the required power of the motor vehicle.

In general, for each application of a battery in a motor vehicle in which the battery is electrically operated, suitable battery cells adapted to the application are developed, so that, for example, it may also be necessary to develop a battery adapted to the respective requirements.

In this adapted solution, the costs are thus increased, which, in addition to the length of travel (Reichweite) of the vehicle and the necessary charging duration of the battery, are crucial for the end user in deciding on an electric vehicle.

Thus, the individual, expensive construction of the batteries of the electric vehicle does not contribute to end user acceptance.

Disclosure of Invention

The battery module having the features of the independent claim has the following advantages: that is, a configuration of the battery module is possible with which different requirements for operating voltage and required power can be standardized and can therefore be realized cost-effectively.

Thus, by means of such standardization, the disadvantages of the prior art can be overcome.

In particular, the parallel connection of individual battery modules can be standardized with the battery module according to the invention.

To this end, a battery module is provided according to the present invention.

Here, the battery module has a plurality of battery cells.

The battery cells each form a first voltage tap on a first side.

The battery cells here each form a second voltage tap on the second side.

The first side is arranged opposite the second side. In particular, the first side is arranged opposite the second side in the longitudinal direction of the battery cell.

In addition, a plurality of battery cells is arranged in a plurality of branches of the battery module.

The battery cells of the branch are arranged alternately in the longitudinal direction of the branch.

The battery module comprises two first partial lines.

The first partial branches in each case have a cell connector of T-shaped design, which electrically connects the battery cells of the respective first partial branch in series with one another.

The battery module comprises at least one second branch.

The at least one second shunt leg has a cell connector of cruciform design, which electrically connects the battery cells of the at least one second shunt leg in series with one another.

Furthermore, the T-shaped cell connectors of the first branching arm are each electrically conductively connected to one of the cross-shaped cell connectors of the at least one second branching arm, in order to form a parallel connection of the branching arms to one another.

Advantageous refinements and improvements of the device specified in the independent claims can be achieved by the measures cited in the dependent claims.

Advantageously, the battery cells are each designed as circular cells. The first side face can be configured as a first end face and the second side face can be configured as a second end face, wherein the first end face and the second end face are arranged opposite one another and in particular also extend parallel to one another.

Here, the first voltage tap may be arranged on the first end face, and the second voltage tap may be arranged on the second end face.

It should also be noted here that the circular cell may also have a first voltage tap on the first end face, and the housing of the circular cell forms a second voltage tap.

therefore, the battery module may be modularly constructed of standardized circular unit cells.

Preferably, the battery cells of the branch are each accommodated in a branch housing.

the arrangement of the battery cells in the branch housing simplifies the construction of the battery module and increases its stability.

in this case, the branch housing can have, for example, an opening into which the individual battery cells of the respective branch can be introduced.

Such a branching housing can in particular be made of plastic.

for this purpose, the battery cells can be introduced into the opening, for example, in the longitudinal direction of the respective branch, alternately with a first voltage tap and a second voltage tap, so that finally the first voltage tap and the second voltage tap are arranged alternately on the top side in the longitudinal direction of the respective branch. For example, for this purpose, it is also possible to bond (einkleben) battery cells.

Furthermore, it is also preferred that the cell connectors of the T-shaped configuration or the cell connectors of the cross-shaped configuration are accommodated in a respective branch housing of the first branch or of the second branch.

For example, the branch line housing can have a guide or receptacle for inserting, inserting or displacing the respective cell connector.

furthermore, cell connectors are each connected in an electrically conductive manner to a first voltage tap of a first battery cell and to a second voltage tap of a second battery cell in a series connection of two adjacent battery cells to one another.

Preferably, the connection is designed to be bonded, for example, by laser welding.

Thus, for example, the crimping line can also be omitted and a solid construction of the battery module is provided overall.

The voltage taps of the individual circular cells can therefore be reliably connected to one another in an electrically conductive manner.

Advantageously, two branch line housings arranged next to one another are each connected to one another in a form-fitting manner.

The branch housings can be connected to one another, for example, by means of the tongue-and-groove principle (Nut-feeder-Prinzip).

Thus, a reliable mechanical connection of the individual branch housings to one another can be formed.

Advantageously, the T-shaped cell connectors of the first of the two first partial branches and of the second of the two first partial branches are arranged mirror-symmetrically to one another.

the mirror plane extends here, for example, parallel to the longitudinal direction of the branches and is preferably also arranged precisely in an intermediate position between the two first branches.

Thereby, a simple structure of the battery module may be achieved.

according to an advantageous aspect of the invention, the first branching arm also has at least one single-well connector of L-shaped configuration arranged end-to-end (endst ä ndig).

In particular, the first branching arms each have a cell connector of L-shaped design on opposite sides of the respective first branching arm in the longitudinal direction.

In this way, the battery module, in particular the first branch, can be extended in the serial direction in a simple manner.

Therefore, the operating voltage position of the battery module can be expanded in a simple manner.

In other words, this means that the battery module can be connected to another battery module in the longitudinal direction in a simple manner.

According to a further advantageous aspect of the invention, the at least one second branching has also at least one single-cell connector of T-shaped configuration arranged end-to-end.

In particular, the at least one second branching path has a cell connector of T-shaped design on the opposite side of the at least one second branching path in the longitudinal direction.

In this way, the battery module, in particular the second branch, can be extended in a simple manner in the serial direction.

Therefore, the operating voltage position of the battery module can be expanded in a simple manner.

In other words, this means that the battery module can be connected to another battery module in the longitudinal direction in a simple manner.

Advantageously, the battery module has a plurality of second partial branches.

This makes it possible to expand the battery modules in parallel in a simple manner.

therefore, the current consumption and power of the battery module can be expanded in a simple manner.

In general, the battery module according to the present invention provides the following advantages: that is, it is possible to provide a battery module which requires only a few standardized components, which can also be adapted to different constructional forms of the vehicle and is also easy to assemble.

Of course, such battery modules can be used for a wide variety of applications, for example for electric vehicles or stationary energy stores.

Drawings

Embodiments of the invention are illustrated in the drawings and are explained in detail in the following description. Wherein

Fig. 1 schematically shows the construction of a battery module according to the present invention in an exploded view, and

fig. 2 schematically shows the connection possibility of two branches.

Detailed Description

Fig. 1 schematically shows the construction of a battery module 1 according to the invention in an exploded view.

Here, the battery module 1 has a plurality of battery cells 2.

In accordance with fig. 1, the battery cells 2 are each designed as circular cells 20.

The battery cells 2, 20 here form a first voltage tap 31 on the first side 21.

The battery cells 2, 20 here form a second voltage tap 32 on the second side 22.

The first side 21 is configured differently from the second side 22, and the first side 21 is arranged opposite the second side 22.

Here, the first side surface 21 may be a first end surface, and the second side surface 22 may be a second end surface.

For example, the first voltage tap 31 may be a positive voltage tap, and the second voltage tap 32 may be a negative voltage tap.

The battery cells 2, 20 are also arranged in the branch lines 4 of the battery module 1.

For this purpose, in the exemplary embodiment of the battery module 1 according to fig. 1, the battery cells 2, 20 are accommodated in a branching housing 6.

Preferably, the branch housing 6 is made of plastic.

In the exemplary embodiment of the battery module 1 according to fig. 1, a first number 51 of battery cells 2, 20 is arranged in the first type of first branching path 41, wherein fig. 1 shows a first number 51 of four battery cells 2, 20 outside a first branching path housing 61 of the first type of first branching path 41.

Furthermore, a second number 52 of battery cells 2, 20 is arranged in the second branch path 42, wherein fig. 1 shows the second number 52 of four battery cells 2, 20 arranged in the second branch path housing 62 of the second branch path 42.

Furthermore, a third number 53 of battery cells 2, 20 is arranged in the second type of first branching 43, wherein fig. 1 shows a third number 53 of four battery cells 2, 20 arranged in a third branching housing 63 of the second type of first branching 43.

The second branching path 42 is always arranged between the two first branching paths 41, 43.

Furthermore, it can be seen from fig. 1 that the battery cells 2, 20 are arranged alternately in the longitudinal direction 7.

In particular, the first number 51 is arranged alternately in a first longitudinal direction 71 of the first type of first branching 41, the second number 52 is arranged alternately in a second longitudinal direction 72 of the second branching 42, and the third number 53 is arranged alternately in a third longitudinal direction 73 of the second type of first branching 43.

As can be seen from fig. 1, "alternating" is to be understood to mean that the first voltage taps 31 and the second voltage taps 32 are arranged alternately on the top side of the respective branch housing 6, 61, 62, 63 in the longitudinal direction 7, respectively, such that on the top side in the direction of the respective longitudinal direction 7, 71, 72, 73 the second voltage taps 32 follow the first voltage taps 31 and the first voltage taps 31 follow the second voltage taps 32.

it should also be noted here that the respectively directly adjacent battery cells 2, 20 of the different branches 4 have the same arrangement, so that the first voltage taps 31 of the adjacent battery cells 2, 20 of the different branches are always arranged on the top side or on the bottom side.

Furthermore, the first branching lines 41, 43 each have a cell connector 8 of T-shaped design. The cell connectors 8 in the form of a T connect the first voltage tap 31 of the battery cells 2, 20 to the second voltage tap 32 of the other battery cell 2, 20, which is arranged adjacent to the battery cell 2, 20 with the first voltage tap 31. The first number 51 of battery cells 2, 20 of the first type of first shunt 41 and the third number 53 of battery cells 2, 20 of the second type of first shunt 43 are thereby each electrically conductively connected in series to one another.

In addition, the second branching arms 42 each have a single-cell connector 9 of cruciform configuration.

The cell connectors 9, which are of cruciform design, in this case connect the first voltage tap 31 of the battery cell 2, 20 to the second voltage tap 32 of the other battery cell 2, 20, which is arranged adjacent to the battery cell 2, 20 with the first voltage tap 31. The second number 52 of battery cells 2, 20 of the second branch 42 are thereby each electrically conductively connected in series to one another.

In the exemplary embodiment of the battery module 1 shown in fig. 1, the cell connectors 8 of the T-shaped configuration or the cell connectors 9 of the cross-shaped configuration are arranged on the bottom side of the respective branch lines 4 for connecting the first battery cell 23 and the second battery cell 24, on the top side of the respective branch lines 4 for connecting the second battery cell 24 and the third battery cell 25, and on the bottom side of the respective branch lines 4 for connecting the third battery cell 25 and the fourth battery cell 26.

the reference numerals of the battery cells 2, 20, which are the first, second, third or fourth, are carried out here by way of example in the longitudinal direction 71, 72, 73 for the exemplary embodiment according to fig. 1.

In other words, this means that T-shaped cell connectors 8 or cross-shaped cell connectors 9 are arranged alternately on the bottom side of the respective branch 4 and on the top side of the respective branch 4.

furthermore, it can be seen from fig. 1 that the T-shaped cell connector 8 of the first branching arm 41, 43 is also connected in an electrically conductive manner to one of the cross-shaped cell connectors 9 of the second branching arm 42.

Thereby, the individual branch paths 4 can be electrically connected to each other in parallel.

It should also be noted here that a so-called 4s3p connection of the battery cells 2, 20 can thereby be formed.

Fig. 1 shows, for example, that the cell connector 8 of T-shaped design or the cell connector 9 of cross-shaped design has a bead 10 at its end, which is designed, in particular, to extend at right angles to the remaining cell connectors 8, 9.

Thereby, a sufficiently large contact area can be constructed between the cell connectors 8, 9, and thereby a reliable contact can be ensured.

The T-shaped cell connectors 8 or the cross-shaped cell connectors 9 can preferably be accommodated in the respective branch housing 6.

It should be noted here that the first type of first branching path 41 and the second type of first branching path 43 are arranged substantially mirror-symmetrically to one another. In particular, the cell connectors 8 of the T-shaped configuration are arranged mirror-symmetrically to one another.

The branch housings 6 are preferably made of plastic and can advantageously be connected to one another in a form-fitting manner.

Fig. 1 furthermore shows that the two first branching paths 41, 43 also have a cell connector 11 of L-shaped configuration.

The L-shaped cell connectors 11 are arranged in a terminal manner in the longitudinal direction 7 of the respective branch 4.

In this case, it can be seen from fig. 1 that both the first type of first branching path 41 and the second type of first branching path 43 each have an L-shaped cell connector 11 on opposite sides of the respective first branching path 41, 43 in the longitudinal direction 71, 73.

The L-shaped cell connectors 11 are in this case electrically conductively connected to the voltage taps 31, 32 of the battery cells 2, 20 of the terminals, respectively.

Fig. 1 furthermore shows that the second branching 42 also has a cell connector 12 of T-shaped configuration.

The cell connectors 12 of the T-shaped design are arranged in a terminal manner in the longitudinal direction 7 of the second branching 42.

As can be seen from fig. 1, the second branching path 42 has a cell connector 12 of T-shaped design on opposite sides of the second branching path 42 in the longitudinal direction 72.

The cell connectors 12 of the T-shaped design are in this case electrically conductively connected to the voltage taps 31, 32 of the battery cells 2, 20 of the terminal, respectively.

Furthermore, the L-shaped cell connectors 11 of the two first branching arms 41, 43 are each electrically conductively connected to an adjacent T-shaped cell connector 12 of the second branching arm 42, in order to thereby form a parallel connection of the individual branching arms 4.

For example, the L-shaped cell connectors 11 of the first type of first shunt branch 41 serve for tapping positive voltages from the battery module 1, and the L-shaped cell connectors 11 of the second type of first shunt branch 43 serve for tapping negative voltages from the battery module 1.

Furthermore, the cell connectors 11 of the L-shaped configuration and the cell connectors 12 of the T-shaped configuration each have a free end 13, by means of which the battery module 1 can be electrically connected in series with another such battery module 1.

in the simplest case of the battery module 1, it consists of three branches, namely a first branch 41 of the first type, a second branch 42 and a first branch 43 of the second type.

This ensures sufficient mechanical stability on the one hand and also allows the voltage and power to be varied on the other hand.

These three components can be provided as standardized submodules and the battery module can be flexibly constructed by means of the number of second branch lines 42.

fig. 1 shows a design of a battery module 1 having three parallel branches 4, wherein each branch 4 has four battery cells 2, 20 connected to one another in series.

For example, the branch line 4 may also be composed of 13 battery cells 2, 20, and thus a 48V system may be constructed.

A 380V system can be constructed if a total of 8 of these branch lines 4 consisting of 13 battery cells 2, 20 are connected in series.

By the number of branches 4, the electrical power can be influenced.

Here, the construction of the cell connectors 8, 9, 11, 12 is also described in detail again and generally discussed.

The cell connector 8, which is of T-shaped design, has a first end 81, a second end 82 and a third end 83.

The cell connector 8, which is of T-shaped design, is formed here by a first straight section 84 and a second straight section 85, wherein the second straight section 85 is connected to the first straight section 84 and is arranged at right angles thereto.

The first and second ends 81, 82 are arranged opposite one another on a first linear section 84, and the third end 83 is arranged on a second linear section 85.

The first end 81 is in this case designed as an electrically conductive connection to a voltage tap of the battery cell 2, 20, and the second end 82 is in this case designed as an electrically conductive connection to a voltage tap of the other battery cell 2, 20, so that the two battery cells 2, 20 can be electrically conductively connected to one another.

The third end 83 is in this case designed as an electrically conductive connection to the cell connector 9 in the form of a cross.

The cell connector 9 in the form of a cross has a first end 91, a second end 92 and a third end 93 and a fourth end 94.

The cell connector 9 of cruciform design is formed here by a first straight section 95 and two second straight sections 96, wherein the two second straight sections 96 are connected to the first straight section 95 and are arranged at right angles to the first straight section and are also arranged on opposite sides of the first straight section 96.

the first end 91 is in this case designed as an electrically conductive connection to a voltage tap of the battery cell 2, 20, and the second end 92 is in this case designed as an electrically conductive connection to a voltage tap of the other battery cell 2, 20, so that the two battery cells 2, 20 can be electrically conductively connected to one another.

The third and fourth terminals 93, 94 are each in this case designed as an electrically conductive connection to the third terminal 83 of the cell connector 8 in the form of a T, whereby a parallel connection can be formed.

The cell connectors 11 of L-shaped configuration each have a first straight section 111 and a second straight section 112.

The first section 111 and the second section 112 are connected to one another and are arranged at right angles to one another.

The first linear section 111 comprises a first end 113, which is designed for an electrically conductive connection to a further battery module 1.

The second section 112 comprises a second end 114, which is designed to be electrically conductively connected to the T-shaped cell connector 12 of the second branch 42.

The cell connector 12 of T-shaped design here has a first straight section 121 and a second straight section 122, respectively.

the first linear section 121 here comprises a first end 123 and a second end 124 on opposite sides, which are configured to be electrically conductively connected to the second end 114 of the cell connector 11 in the L-shaped configuration, as a result of which a parallel connection can be achieved.

The second linear section 122 comprises a third end 125, which is configured to be connected in an electrically conductive manner to a further battery module 1.

It should also be noted here that it is also possible to form individual branch housings 6 with different heights, for example in order to mount the cooling system on the bottom side or on the top side. Such a battery module 1 can be accommodated in a further housing, for example, to achieve a seal.

Fig. 2 schematically shows the connection possibility of two branch lines 4.

To this end, the branch housing 6 may include, for example, a groove 600 or a spring 700. Here, the left-hand illustration correspondingly shows the configuration of the groove 600 and the right-hand illustration correspondingly shows the configuration of the spring 700, wherein the following illustration further shows a sectional view.

The branch housing 6 may also comprise a receptacle 800 for receiving the respective end of the cell connectors 8, 9, 11, 12.