DE102022210956A1 - Tempering system for tempering a motor vehicle battery - Google Patents

Abstract

A temperature control system for temperature control of a motor vehicle battery, which has a first battery module arrangement (100) with at least one battery cell (10) and a second battery module arrangement (200) with at least one battery cell (20), has a first temperature control passage (11) for temperature control of the first battery module arrangement by fluid, a second temperature control passage (21) for temperature control of the second battery module arrangement by fluid, a fluid inlet (1) for supplying fluid to the first and second temperature control passages, a fluid outlet (2) for discharging fluid from the first and second temperature control passages and an actuator arrangement with at least one actuator (4) for changing a ratio of a flow through the first temperature control passage with fluid from the fluid inlet and a flow through the second temperature control passage with fluid from the fluid inlet to one another.

Description

The present invention relates to a tempering system for tempering a motor vehicle battery, a battery system and a motor vehicle with the tempering system as well as a method for tempering the battery using the tempering system.

The object of the present invention is to improve the tempering and/or operation of a motor vehicle battery and/or a tempering system for tempering a motor vehicle battery.

This object is achieved by a temperature control system with the features of claim 1. Claims 9, 11 and 12 respectively protect a battery system with a temperature control system described here, a motor vehicle with a battery system described here and a method for temperature control of a motor vehicle battery using a temperature control system described here. The subclaims relate to advantageous further developments.

According to one embodiment of the present invention, a battery for a motor vehicle, in one embodiment of a motor vehicle (motor vehicle battery), has a first battery module arrangement with one or more battery cells, in a further development electrically connected to one another and/or combined to form a composite by at least one common (first) casing, in one embodiment one or more battery modules, in a further development electrically coupled to one another, and a second battery module arrangement with one or more battery cells, in a further development electrically connected to one another and/or combined to form a composite by at least one common (second) casing, in one embodiment one or more battery modules, in a further development electrically coupled to one another.

In one embodiment, the motor vehicle battery has one or more further battery module arrangements with (each) one or more battery cells, which in a further development are electrically connected to one another and/or combined to form a composite by at least one common (further) casing, in one embodiment one or more battery modules, which in a further development are electrically coupled to one another.

In particular, the first, second and/or at least one further battery module arrangement can also each consist of a single battery cell or a single battery module. In one embodiment, a battery cell in the sense of the present invention has a positive cathode, a negative anode and a separator separating them, and can in particular consist of these components. In one embodiment, a battery module in the sense of the present invention has a combination of two or more battery cells, and can in particular consist of these. In one embodiment, the first, second and/or at least one further battery module arrangement has (each) two or more battery modules combined to form a string in a further development, wherein two or more battery modules of the battery module arrangement or of the string can be electrically coupled or connected in one embodiment, in particular via switches, and in a further development can be connected in series or in parallel.

In one embodiment, the motor vehicle has at least one electric motor, which in a further development drives the motor vehicle at least temporarily or is set up or designed or used for this purpose. In one embodiment, the battery is a rechargeable battery or accumulator and/or supplies this electric motor with electrical energy or is set up or designed or used for this purpose (drive battery). The present invention is particularly advantageous for such batteries, in particular due to their application conditions.

Tempering in the sense of the present invention can in particular include warming or heating, in particular, so that in one embodiment “tempering...” can be replaced by “warming...” or “heating...”. Additionally or alternatively, tempering in the sense of the present invention can in particular include cooling, in particular, so that in one embodiment “tempering...” can be replaced by “cooling...” or “warming and cooling...” or “heating and cooling...”.

• - eine erste Temperierpassage, die wenigstens temporär die erste Batteriemodulanordnung durch, in einer Weiterbildung die erste Temperierpassage durchströmendes, Fluid temperiert bzw. hierzu eingerichtet bzw. ausgebildet ist bzw. verwendet wird;
• - eine zweite Temperierpassage, die wenigstens temporär die zweite Batteriemodulanordnung durch, in einer Weiterbildung die zweite Temperierpassage durchströmendes, Fluid temperiert bzw. hierzu eingerichtet bzw. ausgebildet ist bzw. verwendet wird;
• - einen ein- oder mehrkanaligen Fluideinlass zum Zuführen von (dem) Fluid zu der ersten und zweiten Temperierpassage;
• - einen ein- oder mehrkanaligen Fluidauslass zum Abführen von (dem) Fluid aus der ersten und zweiten Temperierpassage; und
• - eine Stellgliedanordnung mit einem oder mehreren Stellgliedern, die bei bzw. infolge einer Verstellung der Stellgliedanordnung ein Verhältnis
  • - einer Durchströmung der ersten Temperierpassage mit Fluid aus dem Fluideinlass und
  • - einer Durchströmung der zweiten Temperierpassage mit Fluid aus dem Fluideinlass

zueinander verändert bzw. hierzu eingerichtet bzw. ausgebildet ist bzw. verwendet wird.According to one embodiment of the present invention, a temperature control system for controlling the temperature of the motor vehicle battery comprises:

• - a first tempering passage which at least temporarily tempers the first battery module arrangement by means of fluid flowing through the first tempering passage in a further development or is set up or designed or used for this purpose;
• - a second tempering passage which at least temporarily tempers the second battery module arrangement by means of fluid flowing through the second tempering passage, or is set up or designed or used for this purpose;
• - a single- or multi-channel fluid inlet for supplying fluid to the first and second tempering passages;
• - a single or multi-channel fluid outlet for discharging fluid from the first and second tempering passages; and
• - an actuator arrangement with one or more actuators which, during or as a result of an adjustment of the actuator arrangement, have a ratio
  • - a flow through the first tempering passage with fluid from the fluid inlet and
  • - a flow through the second tempering passage with fluid from the fluid inlet

changed or arranged or designed or used for this purpose.

In one embodiment, the actuator arrangement blocks flow through the first tempering passage in at least one position, and in a further development it does not block flow through the second tempering passage. Additionally or alternatively, the actuator arrangement blocks flow through the second tempering passage in at least one position, which is different in a further development, and in one embodiment it does not block flow through the first tempering passage.

By changing the ratio of the flow between the first and second tempering passages, in one embodiment a flow through the first tempering passage and/or, in particular alternatively, a flow through the second tempering passage is blocked, in one embodiment different battery cells or battery modules can advantageously be tempered differently at different times, in particular depending on their respective state and/or their respective load and/or an operating mode of the motor vehicle. By increasing the flow through one of the first and second tempering passages in one embodiment and/or reducing the flow through the other of the first and second tempering passages in one embodiment, or at least temporarily blocking it in a further development, in one embodiment a hydraulic resistance can advantageously be reduced and/or a higher amount of heat can be transferred in the one tempering passage whose flow has been increased, and as a result the corresponding battery cells or battery modules can be cooled or heated more strongly. In one embodiment, this can improve the operation of the motor vehicle battery, in particular battery cells or battery modules can be cooled or heated to a desired temperature more quickly as required and/or their waste heat can be better utilized.

• - einer Durchströmung der wenigstens einen weiteren Temperierpassage mit Fluid aus dem Fluideinlass und
• - einer Durchströmung der ersten Temperierpassage mit Fluid aus dem Fluideinlass

zueinander und/oder ein Verhältnis

• - einer Durchströmung der wenigstens einen weiteren Temperierpassage mit Fluid aus dem Fluideinlass und
• - einer Durchströmung der zweiten Temperierpassage mit Fluid aus dem Fluideinlass

zueinander verändert bzw. hierzu eingerichtet bzw. ausgebildet ist bzw. verwendet wird.In one embodiment, the tempering system has at least one further tempering passage, which at least temporarily tempers the first battery module arrangement and/or second battery module arrangement and/or the at least one or one of the further battery module arrangements by means of fluid flowing through the at least one further tempering passage, or is set up or designed or used for this purpose, wherein the actuator arrangement (also) has a ratio during or as a result of an adjustment of the actuator arrangement

• - a flow through the at least one further tempering passage with fluid from the fluid inlet and
• - a flow through the first tempering passage with fluid from the fluid inlet

to each other and/or a relationship

• - a flow through the at least one further tempering passage with fluid from the fluid inlet and
• - a flow through the second tempering passage with fluid from the fluid inlet

changed or arranged or designed or used for this purpose.

In one embodiment, the actuator arrangement blocks a flow of fluid from the fluid inlet through the at least one further tempering passage in at least one position.

By changing the ratio of the flow through the at least one further and the first and/or second tempering passage, in one embodiment a flow through the at least one further tempering passage and/or, in particular alternatively, a flow through the first tempering passage and/or, in particular alternatively, a flow through the second tempering passage is blocked, in one embodiment the temperature control can be adjusted even better or more finely and/or, in particular thereby, the hydraulic resistance can be reduced even more and thereby (in each case) the operation of the motor vehicle battery can be improved even further.

In one embodiment, the actuator or one or more actuators of the actuator arrangement are arranged between the fluid inlet and the fluid outlet; in a further development, the fluid inlet, actuator and fluid outlet are (each) connected or arranged in series in terms of flow technology. In one embodiment, this can have a particularly favorable effect in terms of flow technology and/or save installation space and/or protect the actuator arrangement.

• - zwischen dem Fluideinlass und der ersten Temperierpassage und/oder
• - zwischen dem Fluideinlass und der zweiten Temperierpassage und/oder
• - zwischen dem Fluideinlass und der wenigstens einen weiteren Temperierpassage

angeordnet, in einer Weiterbildung Fluideinlass, Stellglied und die entsprechende(n) Temperierpassage(n) strömungstechnisch in Reihe geschaltet bzw. angeordnet. Dadurch kann in einer Ausführung die Stellgliedanordnung strömungstechnisch besonders günstig wirken.In a further development, at least one actuator of the actuator arrangement

• - between the fluid inlet and the first tempering passage and/or
• - between the fluid inlet and the second tempering passage and/or
• - between the fluid inlet and the at least one further tempering passage

arranged, in a further development the fluid inlet, actuator and the corresponding tempering passage(s) are connected or arranged in series in terms of flow technology. In one embodiment, the actuator arrangement can therefore have a particularly favorable effect in terms of flow technology.

• - zwischen der ersten Temperierpassage und dem Fluidauslass und/oder
• - zwischen der zweiten Temperierpassage und dem Fluidauslass und/oder
• - zwischen der wenigstens einen weiteren Temperierpassage und dem Fluidauslass

In a further development, at least one actuator of the actuator arrangement

• - between the first tempering passage and the fluid outlet and/or
• - between the second tempering passage and the fluid outlet and/or
• - between the at least one further tempering passage and the fluid outlet

In a further development, the corresponding tempering passage(s), actuator and fluid outlet are connected or arranged in series in terms of flow (each). As a result, in one embodiment, the actuator arrangement can be arranged in a particularly favorable structural manner and/or fluid can be advantageously pre-tempered in the corresponding tempering passage.

In one embodiment, the first and second battery module arrangements, in a further development the first, second and at least one further battery module arrangement, are arranged in a common housing. In one embodiment, this allows installation space to be saved and/or the battery module arrangements to be protected and/or better coupled.

In one embodiment, the actuator arrangement or one or more of its actuators (each) has one or more multi-way valves; in particular, the one or more actuators of the actuator arrangement can each be a multi-way valve.

In a further development, the actuator arrangement has one or more actuators in the form of switching valves, in particular changeover or shut-off valves, at least one of which in one embodiment blocks flow through the first tempering passage in one position and enables flow through the second and/or at least one further tempering passage and in another position blocks flow through the second tempering passage and enables flow through the first and/or at least one further tempering passage and in one embodiment in another other position blocks flow through the at least one further tempering passage and enables flow through the first and/or second tempering passage or which is set up or designed or used for this purpose. In particular, the actuator arrangement can have an actuator in the form of a shut-off valve for blocking one or more of the tempering passages, which blocks the respective tempering passage or the respective tempering passages in one position.

Additionally or alternatively, in a further development, the actuator arrangement has one or more actuators in the form of mixing valves, at least one of which enables flow through both the first and the second tempering passage in a first position and also enables flow through both the first and the second tempering passage in at least a second position, wherein the ratio of the flows through the first and second tempering passage in the first position of the actuator arrangement is different from the ratio of the flows through the first and the second tempering passage in the second position of the actuator arrangement. In one embodiment, the or at least one actuator or mixing valve of the actuator arrangement enables, in a first position, both a flow through the first and the second as well as the at least one further tempering passage and, in at least one second position, also a flow through the first and the second as well as the at least one further tempering passage and, preferably, in at least one third position, also a flow through the first and the second as well as the at least one further tempering passage, wherein the ratio of the flow through the at least one further tempering passage and the flow through the first tempering passage and/or the ratio of the flow through the at least one further tempering passage and the second tempering passage in the first position of the actuator arrangement is different from the corresponding ratio in the second and/or third position of the actuator arrangement.

In general, the actuator arrangement in one embodiment, in particular with one or more switching valves, has only (switching) positions in which it blocks a flow through one or more of the tempering passages, in another embodiment, in particular with one or more mixing valves, (switching) positions in which it blocks a flow through both the first and the second and, in a further development of the allows at least one further tempering passage.

By using one or more switching valves, in particular changeover or shut-off valves, the structure and/or control of the temperature control system can be advantageously simplified in one embodiment.

In one embodiment, one or more mixing valves allow the temperature control of the battery to be controlled or regulated even more flexibly or variably, thus allowing the battery to be temperature controlled even better, in particular more precisely and/or more appropriately to the situation.

As is particularly evident from the above, the actuator arrangement in one embodiment can consist of an actuator, in particular a valve, wherein the valve in one embodiment can be a switching valve, in particular a changeover or shut-off valve, or a mixing valve. As a result, the actuator arrangement can be made more compact in one embodiment. The actuator arrangement in one embodiment can also have several actuators, in particular valves, which may also be spatially distributed and/or adjustable in a coordinated manner, wherein one or more of the valves can be a switching valve, in particular a changeover or shut-off valve and/or one or more of the valves can be a mixing valve.

• - einem prognostizierten, in einer Ausführung geplanten oder erwarteten, Zustand von einer oder mehreren der Batteriemodulanordnungen und/oder
• - einer erfassten Belastung, in einer Ausführung Abgabe und/oder Aufnahme elektrischer Energie, von einer oder mehreren der Batteriemodulanordnungen und/oder
• - einer prognostizierten, in einer Ausführung geplanten oder erwarteten, Belastung, in einer Ausführung Abgabe und/oder Aufnahme elektrische Energie, von einer oder mehreren der Batteriemodulanordnungen und/oder
• - einer erfassten Betriebsweise des Kraftfahrzeugs und/oder
• - einer prognostizierten, in einer Ausführung geplanten oder erwarteten, Betriebsweise des Kraftfahrzeugs

verstellt bzw. hierzu, insbesondere hard- und/oder software-, in einer Ausführung programmtechnisch, ausgebildet bzw. eingerichtet ist bzw. verwendet wird.In one embodiment, the temperature control system has a control device which controls the actuator arrangement depending on - a detected state of one or more of the battery module arrangements and/or

• - a predicted, planned or expected, state of one or more of the battery module assemblies and/or
• - a detected load, in one embodiment output and/or absorption of electrical energy, from one or more of the battery module assemblies and/or
• - a predicted, in one embodiment planned or expected, load, in one embodiment output and/or input of electrical energy, from one or more of the battery module assemblies and/or
• - a recorded mode of operation of the motor vehicle and/or
• - a predicted, planned or expected mode of operation of the motor vehicle

adjusted or is designed, set up or used for this purpose, in particular in terms of hardware and/or software, in a programmatic version.

In one embodiment, at least one of the states mentioned here depends on a temperature, in particular a detected temperature and/or a predicted temperature, and/or a state of charge, in particular a detected state of charge and/or a predicted state of charge, and can in particular indicate this temperature or this state of charge.

In this way, the temperature control can be carried out and/or have a particularly advantageous effect in one embodiment.

Thus, purely by way of example, in an embodiment for short-distance travel (predicted mode of operation of the motor vehicle) and/or a battery module arrangement with a higher state of charge and/or greater predicted output of electrical energy, a flow through one of these tempering tempering passages with fluid from the fluid outlet can be increased in order to preheat this battery module arrangement more quickly for the expected use. Also purely by way of example, in an embodiment, when a high temperature and/or load on a battery module arrangement is detected or predicted, a flow through a tempering tempering passage can be increased in order to cool this battery module arrangement appropriately and/or to use its waste heat particularly advantageously.

In one embodiment, the temperature control system has a fluid supply that supplies at least temporarily tempered fluid, in one embodiment cooled or heated, to the fluid inlet or is set up or designed or used for this purpose. Such a fluid supply can in particular have one or more fluid pumps, one or more heat exchangers and/or one or more electrical heating elements.

In one embodiment, the temperature control system has a first and a second (each) single or multi-part temperature control plate and, in a further development, at least one further single or multi-part temperature control plate, wherein the first temperature control passage is designed to control the temperature of the first temperature control plate, to control the temperature of the first battery module arrangement, and the second temperature control passage is designed to control the temperature of the second temperature control plate, to control the temperature of the second battery module arrangement, and optionally the at least one further temperature control plate is designed to control the temperature of the at least one further temperature control passage. In one embodiment, this allows the temperature control, in particular heat transfer, to be improved.

According to one embodiment of the present invention, a battery system for a motor vehicle, in particular a passenger car, in one embodiment comprises a battery system of a motor vehicle, in particular a passenger car, at least one motor vehicle battery described here and a temperature control system described here for temperature control of this motor vehicle battery.

In one embodiment, the motor vehicle is a passenger car. This represents a particularly preferred application for this, in particular due to the structural and thermal boundary conditions and operating conditions typical of passenger cars, without the invention being restricted thereto.

• Verstellen der Stellgliedanordnung zum Verändern eines Verhältnisses einer Durchströmung der ersten Temperierpassage mit Fluid aus dem Fluideinlass und
• einer Durchströmung der zweiten Temperierpassage mit Fluid aus dem Fluideinlass zueinander, insbesondere zum Erhöhen der Durchströmung der einen von der ersten und zweiten Temperierpassage und/oder Reduzieren,
• insbesondere Sperren, der Durchströmung der anderen von der ersten und
• zweiten Temperierpassage, in einer Weiterbildung Verstellen der Stellgliedanordnung zum Verändern eines Verhältnisses einer Durchströmung der wenigstens eine weiteren Temperierpassage mit Fluid aus dem Fluideinlass und
• einer Durchströmung der ersten Temperierpassage mit Fluid aus dem Fluideinlass und/oder eines Verhältnisses einer Durchströmung der wenigstens einer weiteren Temperierpassage mit Fluid aus dem Fluideinlass und einer Durchströmung der zweiten Temperierpassage mit Fluid aus dem Fluideinlass zueinander,
• insbesondere zum Erhöhen der Durchströmung von ein oder zwei von der ersten, zweiten und wenigstens einen weiteren Temperierpassage und/oder Reduzieren, insbesondere Sperren, der Durchströmung von ein oder zwei anderen von der ersten, zweiten und wenigstens einen weiteren Temperierpassage.

According to one embodiment of the present invention, a method for tempering a motor vehicle battery described here using a tempering system described here comprises the step:

• Adjusting the actuator arrangement to change a ratio of a flow through the first tempering passage with fluid from the fluid inlet and
• a flow through the second tempering passage with fluid from the fluid inlet to each other, in particular for increasing the flow through one of the first and second tempering passages and/or reducing it,
• in particular barriers, the flow through the other from the first and
• second tempering passage, in a further development adjusting the actuator arrangement to change a ratio of a flow through the at least one further tempering passage with fluid from the fluid inlet and
• a flow through the first tempering passage with fluid from the fluid inlet and/or a ratio of a flow through the at least one further tempering passage with fluid from the fluid inlet and a flow through the second tempering passage with fluid from the fluid inlet to each other,
• in particular for increasing the flow through one or two of the first, second and at least one further tempering passages and/or reducing, in particular blocking, the flow through one or two other of the first, second and at least one further tempering passages.

As already explained above, in one embodiment the actuator arrangement is adjusted depending on a detected or predicted, in particular planned or expected, state and/or a detected or predicted, in particular planned or expected, load of at least one of the battery module arrangements and/or a detected or predicted, in particular planned or expected, operating mode of the motor vehicle.

Additionally or alternatively, in one embodiment, the actuator arrangement and an electrical operation of one or more of the battery module arrangements of the motor vehicle battery are adjusted in a coordinated manner, or the control device is configured for the coordinated adjustment of the actuator arrangement and an electrical operation of one or more of the battery module arrangements of the motor vehicle battery.

An adjustment of an electrical operation of at least one of the battery module arrangements mentioned here can in particular comprise a change in an electrical connection of two or more of the battery module arrangements, in particular a switching on and/or off of one or more of the battery module arrangements and/or a switching between series and parallel connection. Additionally or alternatively, an adjustment of an electrical operation of at least one of the battery module arrangements in one embodiment can comprise an adjustment, in particular an increase or reduction, of an intake and/or output of electrical energy by the corresponding battery module arrangement(s).

In one embodiment, a flow of fluid from the fluid inlet through at least one of the temperature control passages is increased when an electrical operation of a battery module arrangement tempered by this temperature control passage is adjusted such that this battery module arrangement is subjected to a higher load or this is expected. In other words, the flow of fluid from the fluid inlet through the actuator arrangement through the temperature control passages is changed depending on how, in particular whether, the corresponding battery module arrangements are used or this is expected. In one embodiment, these battery module arrangements can thus advantageously be tempered during or for their use and their operation and/or service life can thereby be improved in one embodiment.

Accordingly, in one embodiment, a flow through at least one of the tempering passages is reduced by the actuator arrangement, in a further development blocked, which is provided or set up for tempering one of the battery module arrangements if, in particular as long as, this battery module arrangement does not absorb and/or emits electrical energy or only to a limited extent.

In this case, "having" is expressly understood as non-exhaustive in the usual technical sense. Accordingly, a feature A that has a feature B can have one or more other features identical to features B and/or one or more other features. Likewise, the indefinite article _" a" is expressly understood as non-exhaustive in the usual technical sense.

• 1: ein Kraftfahrzeug mit einem Batteriesystem mit einem Temperiersystem nach einer Ausführung der vorliegenden Erfindung; und
• 2: ein Verfahren nach einer Ausführung der vorliegenden Erfindung.

Further advantages and features emerge from the subclaims and the embodiments. This shows, partly schematically:

• 1 : a motor vehicle with a battery system with a temperature control system according to an embodiment of the present invention; and
• 2 : a method according to an embodiment of the present invention.

1 shows a motor vehicle 1000 with a temperature control system for controlling the temperature of a motor vehicle battery according to an embodiment of the present invention.

The motor vehicle battery has a first battery module arrangement (s-string) 100 with, in the exemplary embodiment, four battery cells or four battery modules 10 and a second battery module arrangement (s-string) 200 with, in the exemplary embodiment, also four battery cells or four battery modules 20.

Optionally, the motor vehicle battery can have one or more further battery module arrangements, of which an additional battery module arrangement (string) 300 with battery cells or modules 30 is indicated by dashed lines as an example.

The battery module arrangements are arranged in a common (battery) housing 40.

The tempering system has a first tempering passage 11 for tempering the first battery module arrangement using fluid, a second tempering passage 21 for tempering the second battery module arrangement using fluid, and optionally at least one further tempering passage 31 for tempering the further battery module arrangement. In one embodiment, the tempering passages each temper a single-part or multi-part plate 12, 22 or 32 for tempering the respective battery module arrangement.

The tempering system further comprises a fluid inlet 1 for supplying fluid from a fluid supply 3, which is only indicated schematically, to the first and second and optionally further tempering passages and a fluid outlet 2 for discharging fluid from the first and second and optionally further tempering passages and an actuator arrangement with an actuator in the form of a valve 4 for changing a ratio of a flow through the first tempering passage with fluid from the fluid inlet, a flow through the second tempering passage with fluid from the fluid inlet and optionally a flow through the further tempering passage with fluid from the fluid inlet to one another.

In the exemplary embodiment, the actuator or valve 4 is arranged between the fluid inlet 1 and the tempering passages 11 and 21 and optionally 31. In a modification not shown, it can also be arranged downstream after the first, second and optionally further tempering passage and upstream before the fluid outlet. Additionally or alternatively, the actuator arrangement can also have further valves, for example a shut-off valve for blocking one or more of the tempering passages 11, 21 and optionally 31.

The temperature control system has a control device 5, only indicated schematically, for the coordinated adjustment of the actuator or valve 4 or the actuator arrangement and an electrical operation of the battery module arrangements.

The control device 5 adjusts the actuator or valve 4 depending on a detected or predicted, in particular planned or expected, state and/or a detected or predicted, in particular planned or expected, load of at least one of the battery module arrangements and/or a detected or predicted, in particular planned or expected, mode of operation of the motor vehicle in order to change a ratio of a flow through the first tempering passage 11 with fluid from the fluid inlet 1 and a flow through the second tempering passage 21 with fluid from the fluid inlet 1 and optionally a flow through the further tempering passage 31 with fluid from the fluid inlet 1 to one another.

For example, for short-distance travel (predicted mode of operation of the motor vehicle 1000), only or primarily the battery module arrangement with the highest state of charge (detected state of the battery module arrangements) is preheated in a targeted manner by the control device 5 adjusting the valve 4 in such a way that heated fluid from the supply 3 is fed via the fluid inlet 1 only or predominantly to the tempering passage that tempers this battery module arrangement with the highest state of charge. In this way, a hydraulic resistance or loss can be reduced and the battery module arrangement with the highest state of charge can be preheated more quickly.

Analogously, for example, only one of the battery module arrangements can be used temporarily to supply energy to the motor vehicle or can be operated electrically in such a way that it emits electrical energy, in particular when all battery module arrangements are still cold. Then, analogously, fluid from the fluid inlet 1 can only or predominantly be supplied to the temperature control passage that controls the temperature of the battery module arrangement that is currently emitting electrical energy or is currently intended to do so. In this way, this battery module arrangement can advantageously be heated up more quickly and reach its operating temperature. Waste heat from this battery module arrangement can then be used to heat the other battery module arrangement(s) by the control device 5 adjusting the valve 4 accordingly.

2 illustrates an example of a method according to an embodiment of the present invention.

In a step S10, depending on a detected or predicted, in particular planned or expected, state and/or a detected or predicted, in particular planned or expected, load of at least one of the battery module arrangements and/or a detected or predicted, in particular planned or expected, mode of operation of the motor vehicle, a desired ratio of the flows through the various tempering passages to one another is determined, for example an exclusive or predominant flow through the tempering passage for tempering the battery module arrangement with the highest state of charge in a predicted short-distance traffic.

Then, in a step S20, the control device 5 adjusts the valve 4 so that this desired flow ratio is achieved. The method then returns to step S10.

Although exemplary embodiments were explained in the previous description, it should be noted that a large number of modifications are possible. For example, instead of valve 4, two or three valves can be provided, each of which can block or release (only) one of the tempering passages. It should also be noted that the exemplary embodiments are merely examples that are not intended to limit the scope of protection, applications and structure in any way. Rather, the preceding description provides the person skilled in the art with a guide for implementing at least one exemplary embodiment, whereby various changes, in particular with regard to the function and arrangement of the components described, can be made without departing from the scope of protection as it arises from the claims and combinations of features equivalent to these.

List of reference symbols

1

Fluid inlet

2

Fluid outlet

3

care

4

Valve (actuator)

5

Control device

10

Battery cell or module

11

first tempering passage

12

Tempering plate

20

Battery cell or module

21

second tempering passage

22

Tempering plate

30

Battery cell or module

31

further tempering passage

32

Tempering plate

40

common battery housing

100

first battery module arrangement

200

second battery module arrangement

300

further battery module arrangement

1000

Motor vehicle

Claims (13)

Tempering system for tempering a motor vehicle battery, which has a first battery module arrangement (100) with at least one battery cell (10) and a second battery module arrangement (200) with at least one battery cell (20), wherein the tempering system has: - a first tempering passage (11) for tempering the first battery module arrangement by fluid; - a second tempering passage (21) for tempering the second battery module arrangement by fluid; - a fluid inlet (1) for supplying fluid to the first and second tempering passages; a fluid outlet (2) for discharging fluid from the first and second tempering passages; and - an actuator arrangement with at least one actuator (4) for changing a ratio of a flow through the first tempering passage with fluid from the fluid inlet and a flow through supply of the second tempering passage with fluid from the fluid inlet. Tempering system according to the preceding claim, characterized by at least one further tempering passage (31) for tempering at least one battery module arrangement with at least one battery cell of the motor vehicle battery, wherein the actuator arrangement is set up to change a ratio of a flow through the at least one further tempering passage with fluid from the fluid inlet and a flow through the first tempering passage with fluid from the fluid inlet and/or a ratio of a flow through the at least one further tempering passage with fluid from the fluid inlet and a flow through the second tempering passage with fluid from the fluid inlet to one another. Temperature control system according to one of the preceding claims, characterized in that the at least one actuator of the actuator arrangement is arranged between the fluid inlet and the fluid outlet and/or the first and second battery module arrangements are arranged in a common housing (40). Tempering system according to one of the preceding claims, characterized in that at least one actuator of the actuator arrangement is arranged between the fluid inlet and the first and/or second tempering passage. Tempering system according to one of the preceding claims, characterized in that at least one actuator of the actuator arrangement is arranged between the first and/or second tempering passage and the fluid outlet. Tempering system according to one of the preceding claims, characterized in that the actuator arrangement has at least one multi-way valve, in particular at least one switching and/or at least one mixing valve, and/or that the tempering system has a first and a second tempering plate and the first tempering passage is designed to temper the first tempering plate for tempering the first battery module arrangement and the second tempering passage is designed to temper the second tempering plate for tempering the second battery module arrangement. Temperature control system according to one of the preceding claims, characterized by a control device (5) for adjusting the actuator arrangement of the temperature control system depending on a detected or predicted, in particular planned or expected, state and/or a detected or predicted, in particular planned or expected, load of at least one of the battery module arrangements and/or a detected or predicted, in particular planned or expected, operating mode of the motor vehicle. Tempering system according to one of the preceding claims, characterized by a fluid supply (3) for supplying tempered fluid to the fluid inlet. Battery system for a motor vehicle, wherein the battery system has at least one motor vehicle battery which has a first battery module arrangement with at least one battery cell (10) and a second battery module arrangement with at least one battery cell (20), in particular a first battery module arrangement with at least one battery cell (10), a second battery module arrangement with at least one battery cell (20) and at least one further battery module arrangement with at least one battery cell (30), and a temperature control system for temperature control of this motor vehicle battery according to one of the preceding claims. Battery system according to the preceding claim, wherein the control device (5) is arranged for the coordinated adjustment of the actuator arrangement and an electrical operation of at least one of the battery module arrangements of the motor vehicle battery. Motor vehicle (1000), in particular passenger car, with a battery system according to one of the two preceding claims. Method for controlling the temperature of a motor vehicle battery using a temperature control system according to one of the preceding claims, with the step: Adjusting (S20) the actuator arrangement to change a ratio of a flow of fluid from the fluid inlet through the first temperature control passage and a flow of fluid from the fluid inlet through the second temperature control passage to one another, in particular to change a ratio of a flow of fluid from the fluid inlet through the at least one further temperature control passage and a flow of fluid from the fluid inlet through the first temperature control passage and/or a ratio of a flow of fluid from the fluid inlet through the at least one further temperature control passage and a flow of fluid from the fluid inlet through the second temperature control passage to one another. Method according to the preceding claim, characterized by the step: Adjusting the actuator arrangement depending on a detected or predicted, in particular planned or expected, state and/or a detected or predicted, in particular planned or expected, load of at least one of the battery module arrangements and/or a detected or predicted, in particular planned or expected, mode of operation of the motor vehicle and/or coordinated with an adjustment of an electrical operation of at least one of the battery module arrangements of the motor vehicle battery.

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