Battery system with heat exchange device

Patent metadata

Field	Value
Publication number	US-2016276722-A1
Application number	US-201514967372-A
Country	US
Kind code	A1
Filing date	Dec 14, 2015
Priority date	Mar 16, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

A battery pack is provided including: a plurality of battery cells arranged in multiple battery cell rows; one or more heat exchange spaces; and a device for providing heat exchange to the battery pack. Further, the device includes a heat conduction medium passage arranged in the heat exchange spaces, such that the heat conduction medium passage surrounds multiple battery cells in each battery cell row. The heat conduction medium passage is provided with at least a first group of channels and a second group of channels, which are in contact with the surface of each battery cell, and a heat conduction medium is provided in the first group of channels and the second group of channels. The heat conduction medium flows in the first group of channels in a direction opposite from the flow of the heat conduction medium in the second group of channels.

First claim

1 . A battery pack, comprising:
a plurality of battery cells, wherein the plurality of battery cells are arranged in multiple battery cell rows, and each battery cell row comprises multiple battery cells; one or more heat exchange spaces, wherein each heat exchange space is arranged between adjacent battery cell rows or at one side of each battery cell row; and a device to provide heat exchange to the battery pack, wherein, the device comprises a heat conduction medium passage arranged in the one or more heat exchange spaces, such that the heat conduction medium passage surrounds the multiple battery cells in each battery cell row, the heat conduction medium passage is provided with at least a first group of channels and a second group of channels extending in a direction substantially perpendicular to an axial direction of each battery cell and arranged up and down along the axial direction of each battery cell, the first group of channels and the second group of channels are in contact with a surface of each battery cell, the first group of channels and the second group of channels are provided with at least one inlet and at least one outlet, respectively, a heat conduction medium is provided in the first group of channels and in the second group of channels, the heat conduction medium in the first group of channels configured to flow from the at least one inlet to the at least one outlet, the heat conduction medium in the second group of channels configured to flow from the at least one inlet to the at least one outlet, and a heat insulation layer is disposed between the first group of channels and the second group of channels.

2 . The battery pack of claim 1 , wherein the heat insulation layer comprises a thermal insulating material made of at least one of glass fiber, asbestos, rock wool, and aerogel felt.

3 . The battery pack of claim 1 , wherein the first group of channels and the second group of channels are spaced apart, and air in the space between the first group of channels and the second group of channels forms the heat insulation layer..

4 . The battery pack of claim 1 , wherein a flow direction of the heat conduction medium in the first group of channels is opposite to a flow direction of the heat conduction medium in the second group of channels.

5 . The battery pack of claim 1 , wherein the battery pack is provided with the one or more heat exchange spaces, and two battery cell rows are arranged between each pair of adjacent heat exchange spaces..

6 . The battery pack of claim 1 , wherein at least one channel is arranged in the first group of channels, each channel of the first group of channels having a first inlet and a first outlet; and at least one channel is arranged in the second group of channels, and each channel of the second group of channels having a second inlet and a second outlet.

7 . The battery pack of claim 6 , wherein the first inlet of the first group of channels is connected with a first input port, the first outlet of the first group of channels is connected with a first output port, the second inlet of the second group of channels is connected with a second input port, and the second outlet of the second group of channels is connected with a second output port.

8 . A battery system, comprising:
a battery pack, wherein the battery pack includes:
a plurality of battery cells, wherein the plurality of battery cells are arranged in multiple battery cell rows, and each battery cell row comprises multiple battery cells,
one or more heat exchange spaces, wherein each heat exchange space is arranged between adjacent battery cell rows or at one side of each battery cell row,
a device for providing heat exchange to the battery pack, wherein the device includes a heat conduction medium passage arranged in the one or more heat exchanging spaces, wherein the heat conduction medium passage surrounds the multiple battery cells in each battery cell row, the heat conduction medium passage is provided with at least a first group of channels and a second group of channels extending in a direction substantially perpendicular to an axial direction of each battery cell and arranged up and down along the axial direction of each battery cell, the first group of channels and the second group of channels are in contact with a surface of each battery cell, the first group of channels and the second group of channels are provided with at least one inlet and at least one outlet, respectively, a heat conduction medium is provided in the first group of channels and the second group of channels, the heat conduction medium in the first group of channels flows from the at least one inlet to the at least one outlet, and the heat conduction medium in the second group of channels flows from the at least one inlet to the at least one outlet, and a heat insulation layer is arranged between the first group of channels and the second group of channels,
a sensor to detect a temperature of the battery pack; a controller configured to determine and send a control signal according to a temperature value detected by the sensor; a heat conduction medium source configured to provide the heat conduction medium to the heat conduction medium passage; a pump configured to control the flow rate of the heat conduction medium according to the control signal sent by the controller; a heat treatment device configured to heat or cool the heat conduction medium entering into the heat conduction medium passage; and a passage, wherein the heat conduction medium source, the pump, the heat treatment device, and the heat conduction medium passage are in fluid communication via the passage.

9 . The battery system of claim 8 , wherein the heat insulation layer comprises a thermal insulating material made from at least one of glass fiber, asbestos, rock wool, and aerogel felt.

10 . The battery system of claim 8 , wherein the first group of channels and the second group of channels are spaced apart, and air in the space between the first group of channels and the second group of channels forms the heat insulation layer.

11 . The battery system of claim 8 , wherein a flow direction of the heat conduction medium in the first group of channels is opposite to a flow direction of the heat conduction medium in the second group of channels.

12 . An electric vehicle, comprising:
an electric motor; a battery pack configured to power the electric motor, the battery pack including:
a plurality of battery cells, wherein the plurality of battery cells are arranged in multiple battery cell rows, and each battery cell row comprises multiple battery cells,
one or more heat exchange spaces, wherein each heat exchange space is arranged between adjacent battery cell rows or at one side of each battery cell row,
a device for providing heat exchange to the battery pack, wherein the device includes a heat conduction medium passage arranged in the one or more heat exchanging spaces, wherein the heat conduction medium passage surrounds the multiple battery cells in each battery cell row, the heat conduction medium passage is provided with at least a first group of channels and a second group of channels extending in a direction substantially perpendicular to an axial direction of each battery cell and arranged up and down along the axial direction of each battery cell, the first group of channels and the second group of channels are in contact with a surface of each battery cell, the first group of channels and the second group of channels are provided with at least one inlet and at least one outlet, respectively, a heat conduction medium is provided in the first group of channels and the second group of c

Assignees

• Thunder Power Hong Kong Ltd

Inventors

• Ho Ming-Hui

Classifications

• H02J7/56

  Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters · CPC title

• H01M10/486

  for measuring temperature · CPC title

• B60L58/27

  by heating · CPC title

• B60K2001/005

  the electric storage means · CPC title

• B60H1/00564

  of air ducts · CPC title