CN210926234U - Square lithium battery module and battery module system - Google Patents

Square lithium battery module and battery module system Download PDF

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Publication number
CN210926234U
CN210926234U CN201922358686.2U CN201922358686U CN210926234U CN 210926234 U CN210926234 U CN 210926234U CN 201922358686 U CN201922358686 U CN 201922358686U CN 210926234 U CN210926234 U CN 210926234U
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Prior art keywords
battery
liquid cooling
battery module
square lithium
lithium battery
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CN201922358686.2U
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Chinese (zh)
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江波
刘丽荣
林桐华
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Farasis Energy Ganzhou Co Ltd
Farasis Energy Zhenjiang Co Ltd
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Farasis Energy Ganzhou Co Ltd
Farasis Energy Zhenjiang Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Abstract

The utility model relates to a battery cooling technology field provides a square lithium battery module and battery module system, square lithium battery module, include: the battery pack comprises a plurality of battery cells arranged along a first direction, and the length directions of the battery cells are parallel to the first direction; the cooling system comprises a plurality of liquid cooling plates arranged at intervals, wherein the liquid cooling plates are adjacent to each other, a container for containing the battery pack is arranged between the liquid cooling plates, and the battery pack is installed in the container and attached to the liquid cooling plates on two sides. The square lithium battery module of the utility model is provided with a plurality of electric cores which are arranged along the first direction and the length direction of the electric cores is parallel to the first direction, so that the number of the electric cores cooled by two adjacent liquid cooling plates is reduced, and the internal temperature difference of the square lithium battery pack is reduced; the liquid cooling plates are arranged on the two sides of the battery cell, so that the battery cell is cooled more uniformly, and the internal temperature difference of the square lithium battery pack is reduced.

Description

Square lithium battery module and battery module system
Technical Field
The utility model relates to a battery cooling technology field, in particular to square lithium cell module and battery module system.
Background
With the increasing severity of the problems of environmental pollution and energy shortage, new energy automobiles are more and more emphasized. The power battery is a power source for providing power source for the tool, and is one of the core components of the electric vehicle.
The square lithium battery is often stacked into a battery pack as a power battery due to the characteristics of high voltage, good circulation, no memory effect, high specific energy, high space utilization rate and the like, but in the charging and discharging process, on one hand, more heat is generated due to the influence of polarization heat, reaction heat, Joule heat and the like, and on the other hand, the square lithium battery is tightly arranged, so that the heat is concentrated and is not easy to dissipate, and the temperature of the battery pack is increased. The power battery has certain requirements on the working temperature, and if the working temperature exceeds the working temperature range, the power battery cannot normally work and the service life of the power battery is influenced. The existing heat dissipation device has uneven heat dissipation effect, so that the temperature difference inside the battery pack is further increased, and the working efficiency and the service life of the power battery are influenced.
Therefore, reducing the internal temperature difference of the square lithium battery pack becomes a problem to be considered.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a square lithium cell module and battery module system to reduce the inside difference in temperature of square lithium cell group.
In order to achieve the above object, the utility model provides a square lithium battery module in one aspect, include:
the battery pack comprises a plurality of battery cells arranged along a first direction, and the length directions of the battery cells are parallel to the first direction;
the cooling system comprises a plurality of liquid cooling plates arranged at intervals, wherein each liquid cooling plate is adjacent to each other, a container for containing each battery pack is arranged between the liquid cooling plates, and the battery packs are installed in the container and attached to the liquid cooling plates on two sides.
Preferably, the surface defined by the thickness and the length of the battery core is attached to the liquid cooling plate.
Preferably, the surface defined by the width and the length of the battery core is attached to the liquid cooling plate.
Preferably, the head end of each of two adjacent cells in the battery pack faces the tail end of the other cell.
Preferably, a flow channel is arranged in the liquid cooling plate, and the flow channels of the liquid cooling plates are connected in parallel.
Preferably, a heat conducting pad is arranged between the liquid cooling plate and the battery pack.
Preferably, the tabs of the plurality of battery cells in the battery pack are located on the same plane.
Preferably, the battery cell is an aluminum shell battery cell, a steel shell battery cell or a soft package battery cell.
Furthermore, the utility model provides a battery module system, it is including a plurality of square lithium battery module.
Preferably, a gap exists between two adjacent square lithium battery modules.
Compared with the prior art, the square lithium battery module of the utility model has the advantages that the number of the electric cores cooled by the two adjacent liquid cooling plates is reduced by arranging the plurality of electric cores which are arranged along the first direction and the length direction of the electric cores is parallel to the first direction, so that the temperature balance of the plurality of electric cores arranged in the same cavity is favorably maintained, and the temperature difference between the inlet and the outlet of the liquid cooling plates is reduced, thereby further reducing the internal temperature difference of the square lithium battery pack; the liquid cooling plates are arranged on the two sides of the battery cell, so that the battery cell is cooled more uniformly, and the internal temperature difference of the square lithium battery pack is reduced.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural diagram of a square lithium battery module according to an embodiment of the present invention;
fig. 2 is an exploded view of a square lithium battery module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cooling system according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating an installation of a battery cell according to an embodiment of the present invention;
fig. 5 is an exploded view of the cell and the liquid cooled plate of fig. 4.
Description of reference numerals:
1 electric core 2 liquid cooling plate
3 containing cavity 4 heat conducting pad
5 water inlet pipe and 6 water outlet pipe
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, the use of directional terms such as "upper and lower" generally means upper and lower as shown with reference to fig. 1, unless otherwise specified. The present invention will be described in detail with reference to fig. 1 to 5 in conjunction with embodiments.
According to an aspect of the present invention, there is provided a square lithium battery module, as shown in fig. 1 and 2, including:
the battery pack comprises a plurality of battery cells 1 arranged along a first direction, and the length directions of the battery cells 1 are parallel to the first direction;
the cooling system comprises a plurality of liquid cooling plates 2 arranged at intervals, a containing cavity 3 for containing each battery pack is arranged between every two adjacent liquid cooling plates 2, and the battery packs are arranged in the containing cavities 3 and attached to the liquid cooling plates 2 on two sides.
The utility model discloses a square lithium battery module is through setting up along first direction setting and a plurality of electric cores 1 that the length direction of electric core 1 is parallel to first direction for the quantity of electric core 1 that two adjacent liquid cooling boards 2 cooled down reduces, and such setting is favorable to maintaining the temperature balance of a plurality of electric cores 1 that set up in same appearance chamber 3 on the one hand, and on the other hand, makes the difference in temperature in the entrance and the exit of liquid cooling board 2 reduce, has further reduced the inside difference in temperature of square lithium battery group; the liquid cooling plates 2 are arranged on the two sides of the battery cell 1, so that the battery cell 1 is cooled more uniformly, and the internal temperature difference of the square lithium battery pack is reduced.
In the above, the plurality of liquid-cooling plates 2 are arranged in parallel with each other, and the longitudinal direction thereof is parallel to the first direction. Such setting up makes the group battery can closely laminate with liquid cooling board 2, improves the cooling effect of liquid cooling board 2.
Further, the number of the battery packs is the same as that of the accommodating cavities 3, and a plurality of the battery packs are located on the same plane. Such setting makes the both sides of every group battery laminate with two liquid cold drawing 2 simultaneously, avoids the increase of the difference in temperature of group battery both sides.
In order to adapt to different working environments, according to an embodiment of the present invention, as shown in fig. 4, the surface defined by the thickness and the length of the battery cell 1 is attached to the liquid cooling plate 2. Such setting makes battery module's thickness less, when reducing the inside difference in temperature of battery module, on the one hand, is favorable to the battery module to arrange according to the space of difference, and on the other hand is because liquid cold plate 2's weight is great, manufacturing cost is higher, under the relatively better condition of heat dissipation environment, is favorable to alleviateing battery module's weight and manufacturing cost.
According to another embodiment of the present invention, the surface defined by the width and the length of the battery cell 1 is attached to the liquid cooling plate 2. Due to the arrangement, the battery pack can be attached to the liquid cooling plate 2 in the largest area, and the heat dissipation of the battery pack is facilitated under the condition that the heat dissipation environment is poor.
Because in the discharge and charging process, the temperature of the inside of the battery cell 1 is uneven and is close to the position temperature of the lug of the battery cell 1, the temperature is relatively high, in order to further reduce the internal temperature difference of the battery pack, the battery cells 1 are arranged in the same direction, two adjacent battery cells 1 and one adjacent head end of the battery cell 1 face to the tail end of the other battery cell. The arrangement makes the heat exchange between the plurality of electric cores 1 and the liquid cooling plate 2 more uniform, so that the cooling effect of the liquid cooling plate 2 on the electric cores 1 in the battery pack is the same. In addition, a plurality of electric cores 1 in the battery are arranged in the same direction, so that the installation of a bus bar is facilitated.
In order to facilitate circulation of cooling liquid, a flow channel is arranged in the liquid cooling plate 2, in order to further reduce the temperature difference of the battery pack, the flow channel comprises a plurality of channels arranged along the length direction of the liquid cooling plate 2, the channels are sequentially communicated, and the flow channels of the liquid cooling plate 2 are connected in parallel in order to ensure that the temperature of inlets of the flow channels is the same. As shown in fig. 3, the cooling system includes a water inlet pipe 5 and a water outlet pipe 6, the water inlet pipe 6 is communicated with inlets of a plurality of the liquid-cooling plates 2, and the water outlet pipe 6 is communicated with outlets of a plurality of the liquid-cooling plates 2.
In order to make the laminating tighter between group battery and liquid cooling board 2, as shown in fig. 5, liquid cooling board 2 with be equipped with heat conduction pad 4 between the group battery, heat conduction pad 4 includes the heat conduction silica gel pad.
In order to facilitate the installation of the busbar, the tabs of the plurality of electric cores 1 in the battery pack are located on the same plane.
In the above, the battery cell 1 is an aluminum-shell battery cell, a steel-shell battery cell or a soft-package battery cell. When electric core 1 is aluminum hull electric core or box hat electric core, because the shape of aluminum hull electric core or box hat electric core is the cuboid, be favorable to closely laminating between electric core 1 and the liquid cold plate 2, work as when electric core 1 is soft-packaged electric core, make the weight of group battery reduce, be favorable to alleviateing the weight of square lithium battery module.
Furthermore, the utility model also provides a battery module system, it is including a plurality of square lithium battery module.
In order to facilitate the heat dissipation of the battery module system, a gap exists between every two adjacent square lithium battery modules.
In the foregoing, two adjacent be equipped with heat conduction pad 4 in the clearance between the square lithium battery module, such setting is favorable to the heat dissipation of electric core 1.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a square lithium battery module which characterized in that includes:
the battery pack comprises a plurality of battery cells (1) arranged along a first direction, and the length directions of the battery cells (1) are parallel to the first direction;
the cooling system comprises a plurality of liquid cooling plates (2) arranged at intervals, wherein each two adjacent liquid cooling plates (2) are provided with a cavity (3) for accommodating each battery pack, and the battery packs are arranged in the cavities (3) and attached to the liquid cooling plates (2) on two sides.
2. The square lithium battery module as claimed in claim 1, wherein the surface defined by the thickness and the length of the battery cell (1) is attached to the liquid cooling plate (2).
3. The square lithium battery module as claimed in claim 1, wherein the surface defined by the width and the length of the battery cell (1) is attached to the liquid cooling plate (2).
4. The square lithium battery module as claimed in claim 2 or 3, wherein the plurality of cells (1) in the battery pack are arranged in the same direction.
5. The square lithium battery module as claimed in claim 1, wherein a flow channel is formed in the liquid cooling plate (2), and the flow channels of the liquid cooling plates (2) are connected in parallel.
6. The lithium square battery module as claimed in claim 1, wherein a thermal pad (4) is provided between the liquid cooling plate (2) and the battery pack.
7. The square lithium battery module as claimed in claim 1, wherein the tabs of the plurality of cells (1) in the battery pack are located on the same plane.
8. The square lithium battery module as claimed in claim 1, wherein the battery cell (1) is an aluminum-clad battery cell, a steel-clad battery cell or a soft-clad battery cell.
9. A battery module system comprising a plurality of prismatic lithium battery modules according to any one of claims 1 to 8.
10. The battery module system according to claim 9, wherein a gap exists between two adjacent square lithium battery modules.
CN201922358686.2U 2019-12-24 2019-12-24 Square lithium battery module and battery module system Active CN210926234U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922358686.2U CN210926234U (en) 2019-12-24 2019-12-24 Square lithium battery module and battery module system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922358686.2U CN210926234U (en) 2019-12-24 2019-12-24 Square lithium battery module and battery module system

Publications (1)

Publication Number Publication Date
CN210926234U true CN210926234U (en) 2020-07-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113113694A (en) * 2021-02-26 2021-07-13 合肥国轩高科动力能源有限公司 Lithium battery module integrated with liquid cooling function
CN113871754A (en) * 2021-09-28 2021-12-31 蜂巢能源科技有限公司 Battery module and battery pack

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113113694A (en) * 2021-02-26 2021-07-13 合肥国轩高科动力能源有限公司 Lithium battery module integrated with liquid cooling function
CN113871754A (en) * 2021-09-28 2021-12-31 蜂巢能源科技有限公司 Battery module and battery pack

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