TWM632288U - Battery module with runner device - Google Patents

Abstract

A battery module with a flow channel device comprises: a battery cell fixing device, a plurality of battery cells and a flow channel device. A plurality of cells are arranged in the cell fixing device and covered by the cell fixing device. The flow channel device is embedded in the casing and/or the battery frame of the cell fixing device. The cooling fluid flows in the flow channel device. The cooling fluid flowing into the channel inlet and the channel outlet cools the plurality of cells and flows out of the channel device from the channel outlet. The flow rate of the cooling fluid in the channel device is controlled by the control device. Therefore, the battery module with the runner device of the present invention dissipates heat by forced convection.

Description

Battery module with runner device

This creation is related to a battery module, especially a battery module with a flow channel device.

Due to their high energy density, battery modules are widely used in consumer electronic products and electric vehicles. The conventional battery module uses natural convection to dissipate heat. In the case that natural convection is not enough to dissipate heat in time, the battery module will have a problem of overheating. The problem of overheating of the battery module may be caused by itself, or it may be affected by a heat source outside the battery module. This will lead to uneven discharge of the cells in the battery module, affecting the life and efficiency of the cells.

Therefore, the purpose of the present invention is to provide a battery module with a flow channel device, which replaces natural convection with a more efficient forced convection heat dissipation method.

The technical means adopted by the present invention to solve the problems of the prior art is to provide a battery module, which includes: a battery cell fixing device, the battery cell fixing device includes a casing and/or a battery holder; a plurality of battery cells, arranged The cell fixing device is covered by the cell fixing device; and a flow channel device is embedded in the casing and/or the battery rack, and the flow channel device is for the circulation of cooling fluid, and the flow channel device has a flow channel The inlet and the outlet of the flow channel, the cooling fluid flowing in from the inlet of the flow channel cools the plurality of cells and flows out of the flow channel device from the outlet of the flow channel, and the flow channel device is connected to a control device, so that the cooling fluid is The flow rate of the flow channel device is controlled by the control device.

In an embodiment of the present invention, a battery module is provided, and the flow channel device is a channel that runs straight through the battery cell fixing device.

In an embodiment of the present invention, a battery module is provided. The flow channel device includes a tube body, and the tube body is embedded in the casing and/or the battery holder.

In an embodiment of the present invention, a battery module is provided, and the tube body is a metal tube.

In an embodiment of the present invention, a battery module is provided, and the tube body is injection-molded.

In an embodiment of the present invention, a battery module is provided, and the flow channel device is formed by drilling.

In an embodiment of the present invention, a battery module is provided, and the flow channel devices are plural.

In an embodiment of the present invention, a battery module is provided, which further includes the control device.

Through the technical means adopted by the battery module of the present invention, a flow channel device is embedded in the casing and/or the battery rack, and the cooling fluid circulates in the flow channel device, so that the cooling fluid can cool a plurality of the battery cells. Since the flow rate of the cooling fluid in the flow channel device is controlled by the control device, the cells can be dissipated by forced convection. Since forced convection has better heat dissipation capability than natural convection, the battery module of the present invention can better restrain the increase of the temperature of the battery cells, so that the battery cells can be discharged evenly, and the decline of the battery life and use efficiency can be suppressed. In addition, since the casing and/or the battery frame cover the battery cells, the heat dissipation from the casing and/or the battery frame can suppress the influence of the heat source outside the battery module on the battery cells.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5 . This description is not intended to limit the implementation of the present creation, but is one of the embodiments of the present creation.

As shown in FIGS. 1 to 3 , a battery module 100 according to the first embodiment of the present invention includes: a cell fixing device 1 , a plurality of cells 2 , a flow channel device 3 and a control device 4 .

The cell fixing device 1 includes a battery holder 11 . The battery holder 11 includes a plurality of cell accommodating holes 111 . In other embodiments, the battery cell fixing device 1 may only have a casing, or as shown in the second embodiment in FIG. 5 , the battery cell fixing device 1 includes a battery holder 11 and a casing 12 .

The plurality of cell accommodating holes 111 are arranged in parallel, and correspondingly, the plurality of battery cells 2 are also arranged in parallel. In the first embodiment, the battery holder 11 is divided into three parts, the front, the middle and the rear, and the positions of the battery cells 2 are fixed at the front, middle and rear. In other embodiments, the battery holder 11 may have other structures for fixing the battery cells 2, such as integral molding, two front and rear blocks, and the like.

The cell 2 may be a lithium battery cell. As shown in FIG. 1 and FIG. 3 , the cell accommodating holes 111 are regularly arranged. In the first embodiment, the plurality of cells 2 are disposed in the cell accommodating holes of the battery holder 11 and covered by the battery holder 11 . The heat dissipation of the battery rack 11 can suppress the influence of the heat source outside the battery module 100 on the battery cells 2 .

The flow channel device 3 is embedded in the battery holder 11 . The runner device 3 has a runner inlet 31 and a runner outlet 32 . The arrows indicate the flow direction of the cooling fluid. The cooling fluid flowing in from the flow channel inlet 31 cools the plurality of cells 2 and flows out of the flow channel device 3 from the flow channel outlet 32 . Wherein, the cooling fluid can be gas or liquid. In the first embodiment, the flow channel inlet 31 and the flow channel outlet 32 of the single flow channel device 3 are both one, while in other embodiments, the single flow channel device 3 may have branches, the flow channel inlet 31 and/or Or the flow channel outlet 32 may be plural.

The flow channel outlet 32 may be connected to the return channel inlet 31 through the control device 4 to form a system in which the cooling fluid circulates. The flow channel outlet 32 may also be a flow channel inlet 31 connected to another flow channel device 3 .

In the first embodiment, the flow channel device 3 includes a pipe body 33 . The pipe body 33 allows the cooling fluid to circulate in the pipe. The material of the tube body 33 is different from that of the battery holder 11 . The tube body 33 is a metal tube, and the heat transfer coefficient of the metal is used to assist the battery cell 2 to dissipate heat. Specifically, the pipe body 33 is a copper pipe. Of course, the tube body 33 can also be made of other metals or other materials with high thermal conductivity. In other embodiments, the flow channel device 3 may not have the pipe body 33, but only have channels for the cooling fluid to circulate.

In the first embodiment, the tube body 33 is embedded in the cell fixing device 1 by means of injection molding, so as to ensure that there is no gap between the tube body 33 and the battery holder 11 . In other embodiments, the cell fixing device 1 can be divided into two pieces and the tube body 33 can be embedded in the cell fixing device 1 by clamping the tube body 33 .

In the first embodiment, the flow channel device 3 is single. In other embodiments, the number of flow channel devices 3 may also be plural. The plurality of flow channel devices 3 may be controlled by the same or different control devices 4 .

The tube body 33 contacts the plurality of cells 2 and forms direct heat transfer with the cells 2 . The tube body 33 may also be spaced from the battery cell, and the heat transfer between the battery core 2 and the battery core 2 is formed through the battery cell fixing device 1 .

The pipe body 33 has a bent structure. Compared with a non-bent pipe, the bending structure enables a single pipe body 33 to provide a larger cooling range and better heat dissipation effect.

The control device 4 is a mass flow controller, which is connected to the flow channel device 3 , so that the flow rate of the cooling fluid in the pipe body 33 is controlled by the control device 4 . Since the flow rate of the cooling fluid in the flow channel device 3 is controlled by the control device 4 , it can dissipate heat to the battery cell 2 in a forced convection manner. Since forced convection has better heat dissipation capability than natural convection, the battery module 100 of the present invention can better suppress the temperature increase of the battery cells 2, so that the battery cells 2 can be discharged evenly, and the decline of the life span and use efficiency of the battery cells 2 can be suppressed. . As shown in FIG. 1 , in the first embodiment, the control device 4 is built in the battery module 100 . In other embodiments, the flow channel device 3 may also be controlled by a control device outside the battery module.

In the first embodiment, the control device 4 is disposed at the flow channel inlet 31 to communicate with the pipe body 33 . Of course, the control device 4 may also be disposed at the flow channel outlet 32 or other positions of the pipe body 33 .

As shown in FIGS. 4 and 5 , according to a battery module 100 a of the second embodiment of the present invention, the battery cell fixing device 1 includes a battery holder 11 and a casing 12 .

In the second embodiment, a plurality of flow channel devices 3 are embedded in the casing 12 , so that the cooling fluid dissipates heat to the casing 12 and indirectly cools the plurality of cells 2 . The flow channel device 3 is a channel that runs straight through the cell fixing device.

In other embodiments, the flow channel device 3 is embedded in the casing 12 and the battery holder 11 . For example, the casing 12 in the second embodiment is provided with the battery holder 11 in the first embodiment. The casing 12 may be in communication with the flow channel device 3 in the battery holder 11, or may not be in communication and be controlled by different control devices.

In the second embodiment, the flow channel device is formed by drilling. In other embodiments, the flow channel device may be formed by dividing the cell fixing device 1 into two pieces and enclosing the channel.

The above descriptions and descriptions are only the descriptions of the preferred embodiments of the present invention. Those with ordinary knowledge in this technology can make other modifications according to the scope of the patent application defined below and the above descriptions, but these modifications should still be It is the creative spirit of this creation and within the scope of rights of this creation.

100: battery module 100a: Battery Module 1: Cell fixing device 11: Battery holder 111: Cell housing holes 12: Shell 2: Batteries 3: runner device 31: runner entrance 32: runner outlet 33: Tube body 4: Control device

[Fig. 1] is a perspective view showing a battery module according to the first embodiment of the present invention; [Fig. 2] is a three-dimensional schematic diagram showing the flow channel device of the battery module in the battery rack according to the first embodiment of the present invention; [Fig. 3] is a schematic front view showing the flow channel device of the battery module in the battery rack according to the first embodiment of the present invention; [FIG. 4] is a perspective view showing a battery module according to a second embodiment of the present invention; [Fig. 5] is a schematic cross-sectional view showing a battery module according to a second embodiment of the present invention.

100: battery module

1: Cell fixing device

11: Battery holder

2: Batteries

3: runner device

31: runner entrance

32: runner outlet

33: Tube body

4: Control device

Claims (8)

A battery module, comprising: a cell fixing device, the cell fixing device includes a casing and/or a battery holder; a plurality of cells disposed on the cell fixing device and covered by the cell fixing device; and A flow channel device embedded in the casing and/or the battery rack, the flow channel device is for cooling fluid to circulate, the flow channel device has a flow channel inlet and a flow channel outlet, and the cooling fluid flowing in from the flow channel inlet is paired with a plurality of Each of the cells is cooled and flows out of the flow channel device from the flow channel outlet. The flow channel device is connected to a control device, so that the flow rate of the cooling fluid in the flow channel device is controlled by the control device. The battery module of claim 1, wherein the flow channel device is a channel that runs straight through the cell fixing device. The battery module of claim 1, wherein the flow channel device comprises a tube body, and the tube body is embedded in the casing and/or the battery rack. The battery module of claim 3, wherein the tube body is a metal tube. The battery module of claim 3, wherein the tube body is injection-molded. The battery module of claim 1, wherein the flow channel device is formed by drilling. The battery module of claim 1, wherein the flow channel devices are plural. The battery module of claim 1, further comprising the control device.

Images