Accumulator, in particular for a motor vehicle and motor vehicle comprising such an accumulator

Abstract

Accumulator (10), in particular for a motor vehicle, comprising a plurality of parallel-oriented accumulator cells (20, 22) with two parallel sides (24), wherein a coolant channel (30) is formed between opposite sides (24) of two adjacent accumulator cells (20, 22), which is designed to guide coolant between the opposite sides (24) of the adjacent accumulator cells (20, 22) in a coolant flow direction (K) parallel to the opposite sides (24), wherein the accumulator (10) further comprises a heat conduction device (40) which includes at least one planar heat conduction element (42, 44, 46) with a plurality of circular openings (48), wherein the heat conduction device (40) is arranged in the coolant channel (30), characterized in thatthat the circular openings (48) are arranged one behind the other in rows (R) running parallel to the coolant flow direction (K) on the heat conducting element (42, 44, 46).

Description

[0001] The invention relates to an accumulator, in particular for a motor vehicle and a motor vehicle comprising such an accumulator.

[0002] From German patent application DE 10 2009 052 508 A1, an accumulator with a plurality of parallel-aligned accumulator cells is known. A balancing element is arranged between opposite sides of two adjacent accumulator cells for temperature control purposes. This element is suitable for cooling the accumulator cells by dissipating heat. The balancing element is therefore suitable for passive cooling of the accumulator cells and is provided with a thermally conductive surface for this purpose.

[0003] From publication DE 10 2012 112 294 A1, another accumulator is known which is equipped with a plurality of parallel-aligned accumulator cells. A heat-transferring film is arranged between the accumulator cells. The heat-transferring film is thermally connected to a cooling channel that extends along an upper edge of the accumulator cell.

[0004] These types of accumulators are frequently used in motor vehicles and can also be described as electrical energy storage devices. They store electrical energy on an electrochemical basis and are rechargeable. Colloquially, such accumulators are also referred to as batteries, and in the context of motor vehicles, as traction batteries.

[0005] In such accumulators, the individual accumulator cells are often stacked on top of each other and grouped into so-called "stacks." The accumulator cell can also be referred to as a pouch cell.

[0006] From publication WO 2011 / 110898 A1, another accumulator is known which is equipped with a plurality of parallel-aligned accumulator cells. A coolant channel is formed between opposite sides of two adjacent accumulator cells, which is designed to guide coolant between the opposite sides of the adjacent accumulator cells in a coolant flow direction parallel to the opposite sides.

[0007] Such an accumulator is also known from German patent application DE 10 2014 202 293 A1. The accumulator further comprises a heat conduction device, which includes at least one substantially planar heat conduction element with at least one opening, wherein the heat conduction device is arranged in the coolant channel. The opening(s) can be in the form of an elongated slot or be circular.

[0008] A battery assembly for an electrified vehicle is known from publication DE 10 2017 118 405 A1. The battery assembly comprises several battery groups, each of which is in surface contact with a flat heat exchanger plate.

[0009] The object of the present invention is to provide an accumulator, in particular for a motor vehicle, which has a long service life and high performance.

[0010] The problem is solved by the accumulator according to claim 1.

[0011] According to the invention, the circular openings are arranged one behind the other in rows running parallel to the coolant flow direction on the heat conducting element.

[0012] This design allows the cooling capacity of the heat conduction device to be increased.

[0013] Preferably, the heat conducting device comprises at least two superimposed planar heat conducting elements, wherein the circular openings of adjacent heat conducting elements are arranged offset from each other.

[0014] This design allows the flow of coolant through the heat conducting device to be increased.

[0015] In a preferred embodiment, the heat conducting device comprises two cover elements, each of which rests against one of the opposite sides of the adjacent accumulator cells, between which the coolant can be conducted in the coolant flow direction and between which the at least one planar heat conducting element is arranged.

[0016] Preferably, the heat-conducting element is designed as a foil or as a sheet.

[0017] This design enables simple and cost-effective manufacturing of the heat conducting device.

[0018] The invention further relates to a motor vehicle comprising an electric drive and an accumulator according to the invention that supplies the electric drive.

[0019] Details and further advantages of the accumulator and the motor vehicle according to the invention are explained with reference to six exemplary embodiments described below. These illustrate: Fig. 1 a perspective view of an accumulator according to a first embodiment, which is not the subject of the invention; Fig. 2 a perspective view of the accumulator according to a second embodiment; Fig. 3 a perspective view of the accumulator according to a third embodiment; Fig. 3a a detailed view of a heat conduction device of the accumulator according to the third embodiment; Fig. 4 a perspective view of the accumulator according to a fourth embodiment; Fig. 4a a detailed view of the heat conduction device of the accumulator according to the fourth embodiment; Fig. 5 a perspective view of the accumulator according to a fifth embodiment; Fig. 6 a perspective view of the accumulator according to a sixth embodiment, which is not the subject of the invention; Fig. 6a a detailed view of the heat conduction device of the accumulator according to the sixth embodiment; Fig. 7 another perspective view of the accumulator according to the sixth embodiment; Fig. 7a a detailed view of the heat conduction device of the accumulator according to the sixth embodiment; Fig. 7b a further detailed view of the heat conduction device of the accumulator according to the sixth embodiment; Fig. 7c shows another detailed view of the heat conduction device of the accumulator according to the sixth embodiment.

[0020] It should be noted in the introduction that the in the Fig. The embodiments shown in 1 and 6 to 7c are not embodiments according to the invention.

[0021] The application relates to an accumulator 10, in particular for a motor vehicle, comprising a plurality of parallel-aligned accumulator cells 20, 22 with two parallel sides 24, 26.

[0022] Between opposite sides 24, 26 of two adjacent accumulator cells 20, 22 a coolant channel 30 is formed, which is designed to guide coolant between the opposite sides 24 of the adjacent accumulator cells 20, 22 in a coolant flow direction K parallel to the opposite sides 24.

[0023] This design can increase the lifespan and performance of the battery.

[0024] The coolant can, for example, be in liquid form and flow between the accumulator cells 20, 22 through the coolant channel 30.

[0025] The accumulator 10 can comprise a heat conducting device 40, which includes at least one planar heat conducting element 42, 44, 46 with at least one opening 48. The heat conducting device 40 is arranged in the coolant channel 30.

[0026] The opening 48 can have the form of an elongated hole, which preferably extends parallel to the coolant flow direction K. Such a configuration of the heat conduction device 40 is, for example, in Fig. 1 is shown. The heat conducting element 42 can comprise a total of six parallel elongated holes as openings 48.

[0027] According to an alternative embodiment, the heat-conducting element 42, 44, 46 can have a plurality of circular openings 48, which are arranged one behind the other in rows R running parallel to the coolant flow direction K on the heat-conducting element 42, 44, 46. Such an embodiment is described in the Fig. 2, Fig. 3, Fig. 4 to Fig. Figure 5 is shown. The heat-conducting element 42, 44, 46, according to embodiments 2 to 5, is provided with a total of twenty-two rows R. Each row comprises nineteen circular openings 48. The openings 48 of two adjacent rows R are arranged offset from each other in the coolant flow direction K.

[0028] The heat conducting device 40 can comprise a variety of heat conducting elements 42, 44, 46. For example, in the Fig. 3 and Fig. 3a two heat-conducting elements 42, 44 and in the Fig. 4 to Fig. 5 three heat-conducting elements 42, 44, 46 are provided.

[0029] As can be seen particularly from the Fig. 3a and Fig. As can be seen from 4a, the circular openings 48 of adjacent heat conducting elements 42, 44, 46 can be arranged offset from each other.

[0030] As can be seen in particular from the Fig. As shown in Figure 5, the heat conduction device 40 can further comprise two cover elements 50, 52, each of which abuts one of the opposite sides 24 of the adjacent accumulator cells 20, 22. The coolant is conductible between the cover elements 50, 52 in the coolant flow direction K. The at least one planar heat conduction element 42, 44, 46 is arranged between the cover elements 50, 52.

[0031] The heat-conducting element 42, 44, 46 can be arranged according to the [document / reference] in the [document / reference]. Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. The five illustrated embodiments can be designed as a film or as a sheet. According to the embodiment shown in the Fig. 6 to 7c the heat conducting element 42, 44, 46 can also be designed as a fabric.

[0032] The accumulator 10 can be a lithium-ion accumulator. Reference symbol list 10 Accumulator 20 accumulator cells 22 accumulator cells Page 24 Page 26 30 Coolant channel 40 Heat conduction device 42 Heat conducting element 44 Heat conducting element 46 Heat conducting element 48 breakthroughs 50 deck element 52 Cover element R series K Coolant flow direction

Claims

[1] Accumulator (10), in particular for a motor vehicle, comprising a plurality of parallel-oriented accumulator cells (20, 22) with two parallel sides (24), wherein a coolant channel (30) is formed between opposite sides (24) of two adjacent accumulator cells (20, 22), which is designed to guide coolant between the opposite sides (24) of the adjacent accumulator cells (20, 22) in a coolant flow direction (K) parallel to the opposite sides (24), wherein the accumulator (10) further comprises a heat conduction device (40) comprising at least one planar heat conduction element (42, 44, 46) with a plurality of circular openings (48), wherein the heat conduction device (40) is arranged in the coolant channel (30), characterized by, that the circular openings (48) are arranged in rows (R) parallel to the coolant flow direction (K) on the heat conducting element (42, 44, 46). [2] Accumulator (10) according to claim 1, characterized by , that the heat conducting device (40) comprises at least two superimposed planar heat conducting elements (42, 44, 46), wherein the circular openings (48) of adjacent heat conducting elements (42, 44, 46) are arranged offset from each other. [3] Accumulator (10) according to one of claims 1 or 2, characterized by , that the heat conducting device (40) comprises two cover elements (50, 52) which each abut one of the opposite sides (24) of the adjacent accumulator cells (20, 22), between which the coolant can be conducted in the coolant flow direction (K) and between which the at least one planar heat conducting element (42, 44, 46) is arranged. [4] Accumulator (10) according to any one of claims 1 to 3, characterized by , that the heat conducting element (42, 44, 46) is designed as a foil or as a sheet. [5] Motor vehicle comprising an electric drive and an accumulator (10) supplying the electric drive according to any one of claims 1 to 4.

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