DE102011079895A1 - High-voltage battery for use in power supply device of motor vehicle, has module control unit that controls or regulates energy balance of energy storage module having several electrochemical memory cells - Google Patents

Abstract

The high-voltage battery comprises an energy storage module having several memory cells (10) particularly electrochemical cells. The memory cells are electrically connected by two connecting terminals (11,12). A memory cell contacting element is arranged for electrically connecting the connecting terminals of memory cells with the energy storage module. A module control unit is adapted to control or regulate the energy balance of the energy storage module. The components of the module controller are integrated with the memory cell contacting element.

Description

The invention relates to a high-voltage storage for power supply, in particular of a motor vehicle, with integrated module control unit.

In a high-voltage accumulator, usually referred to as a battery, for supplying voltage to a motor vehicle, a plurality of energy storage modules are usually used to drive the vehicle, for example electric vehicles or hybrid vehicles. A respective energy storage module typically consists of several stacked storage cells. The individual memory cells contain electrochemical cells of the battery. The stack of individual memory cells is usually braced. The bracing is used in addition to the mechanical fixation of the modules to each other in particular to counteract deformation by gas pressure changes, which occur during operation in the arranged inside the modules electrochemical cells.

The multiple memory cells of the energy storage modules must be electrically connected to each other. Furthermore, it requires a control of the energy budget within the individual energy storage modules.

It is an object of the present invention to provide a high-voltage storage, which ensures cost-effective production and compact design, a secure power supply.

The object is achieved by the feature combinations of the independent claim. The dependent claims show advantageous embodiments of the invention.

Thus, the object is achieved by a high-voltage storage device for supplying power, in particular a motor vehicle, comprising at least two storage cells, each storage cell comprising at least one electrochemical cell, and wherein each storage cell has at least two electrical connection terminals, a storage cell contacting element, designed for electrically connecting the connection terminals of all memory cells of at least one energy storage module, and a module control unit, designed for controlling and / or regulating the energy balance of the energy storage module, wherein all components of the module control unit are integrated in the memory cell contacting element.

The integration of the electrical components of the module control unit in the memory cell contacting element has the following advantages: The result is a compact unit with corresponding advantages in the design and the size. It requires fewer connectors. This has an advantageous effect on the contact resistance. On the other hand, problems in the contacting can be avoided. This reduces or eliminates the risk of loose contacts. In addition, no separate housing for the module control unit is required. The wiring harness is less expensive, since the individual module control units no longer need to be connected via a cable harness with the individual Speicherzellenkontaktierungselementen. There are various preferred options for integrating the module control unit in the memory cell contacting element: The individual components of the module control unit can be combined on a separate printed circuit board. This printed circuit board can then be soldered or plugged onto the memory cell contacting element. In particular, the attachable variant is preferred because thus the module control unit is interchangeable. Furthermore, individual or all components of the module control unit can be soldered and / or attached directly to the memory cell contacting element, in particular to a printed circuit board of the memory cell contacting element.

These advantages are realized in particular in that the memory cell contacting element comprises a printed circuit board for contacting the connection terminals of all memory cells of at least one energy storage module, wherein all components of the module control unit are arranged directly on this printed circuit board. In particular, all elements of the module control unit are contacted directly on this circuit board. Furthermore, it is advantageously provided that, for each connection terminal, a contacting element connected to the printed circuit board is arranged in the memory cell contacting element, wherein the contacting elements are in electrically conductive contact with a respective connection terminal. In particular, the individual contacting elements are arranged directly on the printed circuit board of the memory cell contacting element. In this preferred embodiment, the integration of the module control unit into the memory cell contacting element thus means the following: The module control unit is not designed as an independent structural unit, which is connected to the memory cell contacting element, for example via a plug. Rather, the electrical components of the module control unit are arranged directly on the circuit board of the Speicherzellenkontaktierungselements. Thus, there are no two printed circuit boards (a first printed circuit board for the module control unit and a second printed circuit board for the memory cell contacting element), but a common printed circuit board covering both the Speicherzellenkontaktierungs functionality and the module control functionality united.

As a further alternative, it is intended to combine the components of the module control unit on a separate circuit board. This printed circuit board is then plugged onto the printed circuit board or onto the carrier of the memory cell contacting element. As a result, the module control unit is integrated on the one hand in the memory cell contacting element, on the other hand, it can also be replaced.

Preferably, a separate module control unit is provided for each energy storage module. Thus, each energy storage module control or regeduell actions are performed. Thus, it is preferable for each of the energy storage modules to individually monitor its charge state and to perform a regulation of the charge state level. To ensure that all energy storage modules occupy a uniform state of charge level in this regulation, the individual module control units are preferably interconnected, in particular via a ring bus.

Furthermore, it is preferably provided that the module control unit for temperature monitoring of the energy storage module, in particular for separate temperature monitoring of each memory cell, is formed. For this purpose, the module control unit preferably comprises at least one component which is designed as a temperature sensor.

Furthermore, it is advantageous that the module control unit is designed to detect a state of charge of the energy storage module. In particular, the module control unit is configured to separately detect a state of charge of each memory cell. The detection of the charge state is advantageously carried out by detecting a cell voltage.

The high-voltage storage according to the invention comprises in its simplest embodiment, only one energy storage module. However, several energy storage modules can be connected in series or in parallel to form a high-voltage storage. In a first variant, a separate memory cell contacting element with integrated module control unit is then located on each energy storage module. However, it is also preferably provided that at least two energy storage modules are equipped with a common memory cell contacting element and a common module control unit integrated in this common memory cell contacting element. In particular, the common memory cell contacting element then comprises a printed circuit board for both energy storage modules. Giespeichermodule is then arranged on this one common printed circuit board.

In a further preferred embodiment, it is provided that the memory cells of the at least one energy storage module are arranged such that all connection terminals are aligned to one side of the high-voltage memory. Thus, the memory cell contacting element can be formed as a flat plate, which is placed on this one side. If the high-voltage storage device according to the invention comprises a plurality of energy storage modules, then preferably all connection terminals of old storage cells are aligned to one side.

In a further preferred embodiment, it is provided that the memory cells are prismatic memory cells which, stacked in at least one row, are arranged one behind the other and clamped between two end plates via tie rods. The clamped over the tie rods end plates serve in addition to the mechanical fixation of the memory cells to each other in particular to counteract deformation by gas pressure changes, which occur during operation in the arranged inside the modules electrochemical cells.

In addition, it is preferably provided that the memory cells of the at least one energy storage module are electrically connected to one another in series and / or in parallel by means of the memory cell contacting element, so that the memory cells in the respective energy storage module are brought together to form a terminal contact of the first polarity and a connection contact of the second polarity. The connection of the integrated module control unit preferably also takes place via the connection contacts of the first or second polarity, or a separate data line is provided for controlling the module control unit.

The invention will be explained in more detail with reference to the drawing. Showing:

1 Memory cells of the high-voltage memory according to the invention according to a first and second embodiment,

2 the placement of a memory cell contacting element with integrated module control unit on an energy storage module of the high-voltage storage device according to the invention according to the first embodiment, and

3 an energy storage module of the high-voltage storage device according to the invention according to a second embodiment.

In the following, a first embodiment based on the 2 shown. 3 shows a second embodiment. 1 shows memory cells, as they come in both embodiments of the high-voltage memory used.

In 1 is a single prismatic memory cell 10 an energy storage module later shown in its entirety 1 to be seen in perspective. The memory cell 10 typically consists of one or more individual electrochemical cells, which in the representation chosen here inside the memory cell 10 lie in secret. On a front side 13 indicates the memory cell 10 a connection terminal 11 first polarity and a connection terminal 12 second polarity. On the back, not shown in the figure 14 the memory cell 10 No connection terminals are provided. One of the connection terminals 11 . 12 , typically the positive pole of the memory cell, may be electrically connected to a housing of the memory cell 10 be connected.

As in the energy storage module according to the invention 1 several of the memory cells 10 Stacked at least one row in a row are at least opposite major surfaces 15 . 16 provided with an electrically insulating material. In the in 1 illustrated embodiment is an adhesive film 20 on the main surfaces 15 . 16 applied. Alternatively, it could be on the main surfaces 15 . 16 also an electrically insulating adhesive can be applied. Likewise, the use of a heat shrink tube on the adhesive surfaces provided with major 15 . 16 is applied, conceivable.

2 shows the placement of a memory cell contacting element 80 with integrated module control unit 95 on the energy storage module 1 the high-voltage storage according to the invention according to the first embodiment. In the left part of the 2 is the process of placing the memory cell contacting element 80 shown. In the right part of the 2 you can see the energy storage module 1 with already attached memory cell contacting element 80 ,

In the energy storage module 1 according to the first embodiment according to 2 become the memory cells 10 in exemplary only two memory cell rows 60 . 61 arranged. The strain of the stacked memory cells is done using endplates 30 . 35 and tie rods 40 to 42 , The tie rods 40 . 41 . 42 run parallel and are spaced apart from each other such that in each case a receiving area for the respective memory cell row 60 . 61 is created. Each of the memory cell rows is thus laterally of two tie rods 40 . 41 respectively. 41 . 42 surround.

The positioning and alignment of the total of twelve memory cells 10 is such that the front sides with the connection terminals 11 . 12 arranged in a plane. On the connection terminals 11 . 12 is the memory cell contacting element 80 placed. This memory cell contacting element 80 connects the individual connection terminals 11 . 12 of the energy storage module 1 among themselves. For this purpose, the memory cell contacting element comprises 80 for each connection terminal to be contacted 11 . 12 a contacting element 82 , Furthermore, the memory cell contacting element comprises 80 a circuit board or carrier 81 connected to the contacting elements 82 electrically connected. The individual contacting elements 82 are with the connection terminals 11 . 12 welded (reference numeral 85 ).

integrated on the circuit board 81 there is a module control unit 95 , The module control unit 95 is designed to control and / or regulate the energy balance of the energy storage module 1 , In particular, the temperature and / or a state of charge of the energy storage module 1 by means of the module control unit 95 detected. All electrical components of the module control unit 95 are right on the circuit board 81 arranged and with the circuit board 81 contacted.

The connection terminals 11 first polarity are by the memory cell contacting element 80 connected by a connection contact 83 first polarity. The connection terminals 12 second polarity are by the memory cell contacting element 80 connected by a connection contact 84 second polarity. The two connection contacts 83 . 84 are laterally or above the memory cell contacting element 80 and thus the side of the energy storage module 1 arranged.

3 shows an energy storage module 1 the high-voltage accumulator according to the invention according to a second embodiment. The same or functionally identical components are provided in both embodiments with the same reference numerals. The only difference between the first and second embodiments is that in the second embodiment only one row 60 with memory cells 10 is arranged. The energy storage module 1 According to the second embodiment is thus constructed narrower. Otherwise, there is no difference between the two embodiments. Also in the second embodiment, the individual connection terminals 11 . 12 the individual memory cells 10 by means of the memory cell contacting element 80 interconnected. Again, the memory cell contacting element comprises 80 a circuit board 81 , On this circuit board 81 are all components of the module control unit 95 arranged.

LIST OF REFERENCE NUMBERS

1

Energy storage module

10

memory cell

11

Connection terminal of the first polarity

12

Connection terminal of the second polarity

13

front

14

back

15

main area

16

main area

20

adhesive film

30

endplate

35

endplate

40

tie rods

41

tie rods

42

tie rods

60

Memory cell row

61

Speecherzellen series

80

Speicherzellenkontaktierungselement

81

circuit board

82

contacting

83

connection contact

84

connection contact

95

Module control unit

Claims (10)

High-voltage storage for the power supply, in particular of a motor vehicle, comprising: - at least one energy storage module ( 1 ), each energy storage module ( 1 ) at least two memory cells ( 10 ), each memory cell ( 10 ) comprises at least one electrochemical cell, and wherein each memory cell ( 10 ) at least two electrical Anschlußerminais ( 11 . 12 ), - a memory cell contacting element ( 80 ), designed for electrically connecting the connection terminals ( 11 . 12 ) of all memory cells ( 10 ) at least one energy storage module ( 1 ), and - a module control unit ( 95 ), designed to control and / or regulate the energy balance of the energy storage module ( 1 ), - wherein all components of the module control unit ( 95 ) in the memory cell contacting element ( 80 ) are integrated. High-voltage storage according to claim 1, characterized in that the memory cell contacting element ( 80 ) a printed circuit board ( 81 ) for contacting the connection terminals ( 11 . 12 ) of all memory cells ( 10 ) at least one energy storage module ( 1 ), wherein all components of the module control unit ( 95 ) directly on this circuit board ( 81 ) are arranged. High-voltage storage according to claim 2, characterized in that for each connection terminal ( 11 . 12 ) with the circuit board 81 connected contacting element ( 82 ) in the memory cell contacting element ( 80 ), wherein the contacting elements ( 82 ) in electrically conductive contact with a respective connection terminal ( 11 . 12 ) stand. High-voltage accumulator according to one of the preceding claims, characterized in that the module control unit ( 95 ) for temperature monitoring of the energy storage module ( 1 ), in particular for separate temperature monitoring of each memory cell ( 10 ), is trained. High-voltage accumulator according to claim 4, characterized in that at least one component of the module control unit ( 95 ) is a temperature sensor. High-voltage accumulator according to one of the preceding claims, characterized in that the module control unit ( 95 ) for detecting a cell voltage of the energy storage module ( 1 ), in particular for separately detecting a cell voltage of each memory cell ( 10 ), is trained. High-voltage accumulator according to one of the preceding claims, characterized by at least two energy storage modules ( 1 ), wherein the memory cell contacting element ( 80 ) for electrically connecting the connection terminals ( 11 . 12 ) of all memory cells ( 10 ) of the at least two energy storage modules ( 1 ), and wherein all the components of the common module control unit ( 95 ) for controlling and / or regulating the energy balance of the at least two energy storage modules ( 1 ) in the common memory cell contacting element ( 80 ) are integrated. High-voltage memory according to one of the preceding claims, characterized in that the memory cells ( 10 ) of the at least one energy storage module ( 1 ) are arranged such that all connection terminals ( 11 . 12 ) are aligned to one side of the high-voltage memory. High-voltage memory according to one of the preceding claims, characterized in that the memory cells ( 10 ) prismatic memory cells ( 10 ), which, at least one row ( 60 . 61 ) stacked one behind the other and between two end plates ( 30 . 35 ) via tie rods ( 40 to 42 ) are braced. High-voltage memory according to one of the preceding claims, characterized in that the memory cells ( 10 ) of the at least one energy storage module ( 1 ) by means of the memory cell contacting element ( 80 ) are electrically connected to each other in series and / or in parallel, so that the memory cells ( 10 ) in the respective energy storage module ( 1 ) to a terminal contact of the first polarity ( 83 ) and a connection contact ( 84 ) are connected through the second polarity.

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