CN223333849U - A soft-pack battery core heat dissipation structure, a minimum unit of a battery core group, and a battery core group - Google Patents

A soft-pack battery core heat dissipation structure, a minimum unit of a battery core group, and a battery core group

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Publication number
CN223333849U
CN223333849U CN202422313064.9U CN202422313064U CN223333849U CN 223333849 U CN223333849 U CN 223333849U CN 202422313064 U CN202422313064 U CN 202422313064U CN 223333849 U CN223333849 U CN 223333849U
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China
Prior art keywords
heat dissipation
soft
battery cell
battery core
aluminum sheet
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CN202422313064.9U
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Chinese (zh)
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李历
赖美珍
柯书奇
胡庆书
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Zhejiang Nandu Energy Technology Co ltd
Zhejiang Narada Power Source Co Ltd
Hangzhou Nandu Power Technology Co Ltd
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Zhejiang Nandu Energy Technology Co ltd
Zhejiang Narada Power Source Co Ltd
Hangzhou Nandu Power Technology Co Ltd
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Priority to CN202422313064.9U priority Critical patent/CN223333849U/en
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    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Secondary Cells (AREA)

Abstract

The utility model relates to the technical field of soft package battery cells, in particular to a soft package battery cell heat dissipation structure, a minimum unit of a battery cell group and the battery cell group. The utility model discloses a soft-package battery core heat dissipation structure, which comprises a heat dissipation aluminum sheet and a battery core supporting structural member for accommodating a soft-package battery core, wherein an opening for exposing a soft-package battery core electrode is formed in one side of the battery core supporting structural member, a heat conduction pad is arranged in a frame of one side of the battery core supporting structural member far away from the opening, the minimum unit of a battery core group of the battery core supporting structural member is adopted to ensure structural strength, reduce material types and cost, the accumulated assembly size deviation of the battery core group formed by the minimum unit of the battery core group is smaller, and meanwhile, the light weight design of two dimensions of space and weight is realized.

Description

Soft packet of electric core heat radiation structure, minimum unit and electric core group of electric core group
Technical Field
The utility model relates to the technical field of soft package battery cells, in particular to a soft package battery cell heat dissipation structure, a minimum unit of a battery cell group and the battery cell group.
Background
The single universal battery cell units can be roughly divided into three types, namely a square shell, a soft package and a cylinder. The three single battery cells have advantages and disadvantages, and the use scenes are different. For the soft package battery core, the device has the advantages of high energy density, small volume, light weight, flexible assembly and the like, generally supports high-rate discharge of more than 5C, is suitable for a scene requiring large electric quantity in a small space, and has a great market prospect on the parking start-stop face of an automobile.
At present, the soft package battery core is too complex in structure for the high/low speed vehicle market, too many in assembly components, larger in size, low in space utilization and the like. And most adopt natural heat dissipation, the radiating effect is not ideal under high multiplying power discharge condition, and especially when heavy current fills and puts, soft packet of electric core is from the heat dissipation ability poor, and the heat is not in time dredged after the group, easily causes thermal runaway.
In the existing soft-package battery core heat dissipation structure, on one hand, a commonly adopted soft-package battery core heat dissipation structure is a plastic structural member and a piece of heat dissipation aluminum sheet which are matched with one battery core, meanwhile, a heat dissipation area of the soft-package battery core heat dissipation structure basically adopts a large surface and a side surface to conduct heat dissipation, the heat dissipation effect is not ideal enough, the heat dissipation requirement of the soft-package battery core under the working condition of high multiplying power or high power is not met, on the other hand, more parts and complex structures are arranged in the existing soft-package battery core heat dissipation structure, so that the accumulated deviation size of assembling of a plurality of parts is larger, and the soft-package battery core heat dissipation structure is not suitable for being assembled in a multi-battery core (multi-battery or multi-string) grouping mode.
Disclosure of utility model
The utility model aims to provide a soft-package battery core radiating structure, a minimum unit of a battery core group and the battery core group, and aims to enhance the bottom area radiating of the soft-package battery core radiating structure, improve the radiating efficiency of the soft-package battery core under the working condition of high multiplying power or high power, meanwhile, the prepared soft-package battery core radiating structure adopts simple and regular parts, the minimum unit of the prepared battery core group has smaller accumulated deviation in the assembly process, simplify the design of a battery core supporting structure, shorten the assembly process route and improve the assembly precision, strength and efficiency.
In a first aspect, the present application provides a heat dissipation structure for a soft package battery cell:
the utility model provides a soft packet of electric core heat radiation structure, includes radiating aluminum sheet and is used for holding the electric core supporting structure spare of soft packet of electric core, electric core supporting structure spare is frame construction, radiating aluminum sheet can dismantle and connect in electric core supporting structure spare, and can contact with the soft packet of electric core in the electric core supporting structure spare, one side of electric core supporting structure spare is provided with the opening that is used for exposing soft packet of electric core electrode, the inside heat conduction pad that is provided with of frame that is kept away from opening one side of electric core supporting structure spare.
According to the application, the heat conduction pad is arranged at the bottom of the cell supporting structural member, the area of the bottom area of the cell is utilized, the heat radiation performance of the bottom of the cell supporting structural member is increased, and the heat radiation performance of the soft-package cell under the working condition of high multiplying power or high power can be improved by matching with the heat radiation aluminum sheet on the side surface of the cell supporting structural member.
Further, the heat conducting pad is a heat conducting insulating pad.
According to the application, the heat conducting pad is selected as the heat conducting insulating pad, so that the bottom heat radiation performance of the heat radiation structure of the soft package battery core can be improved, the soft package battery is further protected, and the soft package battery is more stable in performance and longer in service life.
Further, the frame structure of the heat dissipation aluminum sheet is rectangular, the height of the heat dissipation aluminum sheet is smaller than or equal to the height of the cell supporting structural member, and the width of the heat dissipation aluminum sheet is smaller than or equal to the width of the cell supporting structural member.
Through the technical scheme, the heat dissipation structure of the soft-package battery cell is regular, and the assembly precision is improved.
Further, a boss is arranged on the surface, which is contacted with the battery cell supporting structural member, of the heat conducting pad, and an embedded hole into which the boss can be embedded is arranged on the battery cell supporting structural member.
Further, a heat-conducting medium is arranged on the surface of the heat-radiating aluminum sheet facing the inner cavity of the cell supporting structural member, and the heat-conducting medium is heat-conducting silicone grease or heat-conducting silica gel.
Further, the heat dissipation aluminum sheet is L-shaped, the heat dissipation aluminum sheet contacts with the boss of the heat conduction pad penetrating through the embedded hole, and heat at the bottom can be led out through the heat dissipation aluminum sheet, and further, the heat dissipation performance of the bottom of the soft-package battery core heat dissipation structure is improved.
Furthermore, the contact surface of the cell supporting structural member and the heat dissipation aluminum sheet is provided with a plurality of positioning protrusions, the heat dissipation aluminum sheet is provided with positioning holes which correspond to the positioning protrusions and can accommodate the positioning protrusions, and the heat dissipation aluminum sheet is connected with the cell supporting structural member through buckles.
In a second aspect, the present application provides a minimum unit of a battery cell group:
The application discloses a minimum unit of a battery cell group, which comprises a soft package battery cell heat dissipation structure and a soft package battery cell.
Further, one the inside of soft packet of electric core heat radiation structure can bear one to four soft packet of electric cores, engineering plastics is selected to electric core supporting structure's material, soft packet of electric core's bottom and heat conduction pad contact, and the soft packet of electric core that is close to the heat dissipation aluminum sheet contacts with the heat dissipation aluminum sheet, be provided with heat conduction medium between the contact surface of soft packet of electric core and heat dissipation aluminum sheet, heat conduction medium is heat conduction silicone grease or heat conduction silica gel.
In the application, the battery cell supporting structure member can be made of engineering plastics, one to four soft package battery cells can be borne in the soft package battery cell radiating structure, the price of materials of the battery cell supporting structure member is lower, the light weight design of two dimensions of space and weight is realized, the battery cell supporting structure member bears a plurality of soft package battery cells, the structure is stable, the number of parts is reduced, the battery cell supporting structure member which is made of engineering plastics bears more than four soft package battery cells is unstable in structure and easy to deform, the accumulated assembly size deviation of the assembled battery pack is larger, and the heat dissipation is poor.
In a third aspect, the present application provides a battery cell group:
A battery cell group consists of the minimum unit of the battery cell group.
Through the minimum unit of a plurality of electric core groups, constitute "many strings or many and" electric core group of structural style according to actual project demand, simplified electric core bearing structure design, shortened assembly process route, promoted assembly precision, intensity and efficiency, also improved the radiating efficiency of electric core simultaneously greatly.
The beneficial effects are that:
1. The minimum unit of the battery cell group meets the combination form of 2 parallel or 2 series, not only ensures the structural strength, but also reduces the material types and the cost, the accumulated assembly size deviation of the battery cell group formed by the minimum unit of the battery cell group is smaller under the same condition, and meanwhile, the light weight design is realized for two dimensions of space and weight, and the bottom area of the soft-package battery cell is utilized on the premise of ensuring the heat dissipation of a large surface and a side surface in the aspect of heat dissipation of the battery cell, so that the heat dissipation performance of the bottom of the soft-package battery cell is improved, and the heat dissipation efficiency of the soft-package battery cell under the high-magnification or high-power working condition is improved.
Drawings
Fig. 1 is a schematic diagram of the minimum unit of the cell group of embodiment 1 of the present utility model;
fig. 2 is an exploded view of the minimum unit of the battery cell pack of embodiment 1 of the present utility model;
Fig. 3 is a schematic diagram of a battery cell set according to embodiment 1 of the present utility model;
fig. 4 is an exploded view of the battery cell assembly according to embodiment 1 of the present utility model.
Reference numeral 1, the minimum unit of the battery cell group; 2, a soft package battery core heat dissipation structure, 3, a soft package battery core, 4, a heat conduction pad, 5, a heat conduction medium, 6, a battery core group, 31, a first battery core, 32, a second battery core, 21, a battery core supporting structural member, 22, a heat dissipation aluminum sheet, 23, an opening, 221, a positioning hole and 211, and an embedded hole.
Detailed Description
In order to make the technical scheme of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
The minimum unit 1 of the battery cell group, referring to fig. 1 and 2, includes a soft package battery cell heat dissipation structure 2 and a soft package battery cell 3, where the soft package battery cell 3 includes a first battery cell 31 and a second battery cell 32 (in other embodiments, any number of soft package battery cells from one to four may be set according to the requirement).
The soft-package battery cell heat dissipation structure 2 comprises a heat dissipation aluminum sheet 22 (an 'L' -shaped heat dissipation aluminum sheet 22 is adopted, and an 'I' -shaped heat dissipation aluminum sheet 22 can be adopted in other embodiments) and a battery cell supporting structural member 21 (PT material is selected) for accommodating the soft-package battery cell 3, wherein the battery cell supporting structural member 21 is of a rectangular frame structure, the battery cell supporting structural member 21 is provided with a heat conduction pad 4 (a heat conduction silica gel pad is adopted), and the heat conduction pad 4 is arranged in the battery cell supporting structural member 21 and at the bottom of the soft-package battery cell 3.
The contact surface of the cell supporting structural member 21 and the heat dissipation aluminum sheet 22 is provided with a plurality of positioning protrusions, the heat dissipation aluminum sheet 22 is an L-shaped heat dissipation aluminum sheet 22, and the surface facing the inner cavity of the cell supporting structural member 21 is provided with a heat conduction medium 5 (silica gel is adopted), so that the heat dissipation performance of the minimum unit 1 of the cell group is further improved.
The heat dissipation aluminum sheet 22 is connected with the cell supporting structural member 21 through a buckle and is in contact with the soft package cell 3 in the cell supporting structural member 21, the heat dissipation aluminum sheet 22 is provided with a positioning hole 221 corresponding to the positioning protrusion and capable of accommodating the positioning protrusion on the cell supporting structural member 21, and the positioning protrusion and the positioning hole 221 are matched to improve the dimensional stability and the dimensional accuracy of the minimum unit 1 of the cell group.
The heat conducting pad 4 is provided with a boss on the surface contacted with the battery core supporting structural member 21, the battery core supporting structural member 21 is provided with an embedded hole 211, the boss can be embedded into the embedded hole 211, the stability of the heat conducting pad 4 is improved, the silica gel heat conducting pad 4 with good adhesion performance can improve the stability of the soft package battery core 3 in the battery core supporting structural member 21, the boss penetrating through the embedded hole 211 is contacted with the heat radiating aluminum sheets 22, the part contacted with the boss of the L-shaped heat radiating aluminum sheets 22 is correspondingly prolonged along with the increase of the number of the soft package battery core 3 arranged in the battery core supporting structural member 21, and therefore, all bosses of the heat conducting pad 4 can be contacted with the L-shaped heat radiating aluminum sheets 22, and the heat radiating performance of the minimum unit 1 of the battery core group is further improved.
The battery cell group 6 consists of the minimum unit 1 of the battery cell group, and the assembly process of the battery cell group 6 is as follows in combination with fig. 3 and 4:
firstly, an L-shaped heat dissipation aluminum sheet 22 is installed on a cell support structural member 21, positioning is performed by embedding two positioning point protrusions of the cell support structural member 21 into positioning holes 221 on the L-shaped heat dissipation aluminum sheet 22, and then the L-shaped heat dissipation aluminum sheet 22 and the cell support structural member 21 are fixed through four buckles.
The heat conducting pad 4 is adhered to the bottom of the cell supporting structural member 21, the boss of the heat conducting pad 4 is sleeved into the embedded hole 211 on the cell supporting structural member 21, then the inner side of the L-shaped heat radiating aluminum sheet 22 is uniformly provided with the heat conducting medium 5 (heat conducting silica gel), the first soft package cell 3 meeting the requirement of series connection is installed in the cell supporting structural member 21 and is tightly attached to the L-shaped heat radiating aluminum sheet 22 (in other embodiments, the soft package cells 3 in the smallest unit 1 of the cell group can be connected in parallel), meanwhile, the bottom of the first soft package cell 3 is tightly attached to the heat conducting pad 4, the large surface of the first cell 31 installed in the cell supporting structural member 21 is uniformly provided with the heat conducting medium 5 (heat conducting silica gel), and finally the second cell 32 is installed in the cell supporting structure (the two large surfaces of the second cell 32 are uniformly provided with the heat conducting medium 5), and is tightly attached to the first cell 31, and meanwhile, the bottom of the second cell 32 is tightly attached to the heat conducting pad 4, so that the assembly of the smallest unit 1 of the cell group is completed.
Finally, the minimum units 1 of the plurality of battery cell groups are connected in a "serial" manner (in other embodiments, the minimum units 1 of the battery cell groups in the battery cell group 6 may be actually required to be connected in a "parallel" manner), so as to obtain the battery cell group 6.
The above examples only represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are within the scope of the invention. Accordingly, the protection scope of the present invention shall be subject to the appended claims.

Claims (10)

1.一种软包电芯散热结构，其特征在于，包括散热铝片及用于容纳软包电芯的电芯支撑结构件，所述电芯支撑结构件为框架结构，所述散热铝片可拆卸连接于电芯支撑结构件，且可与电芯支撑结构件中的软包电芯接触，所述电芯支撑结构件的一侧设置有用于显露软包电芯电极的开口，所述电芯支撑结构件远离开口一侧的框架内部设置有导热垫。1. A soft-pack battery cell heat dissipation structure, characterized in that it includes a heat dissipation aluminum sheet and a battery cell support structure for accommodating the soft-pack battery cell, the battery cell support structure is a frame structure, the heat dissipation aluminum sheet is detachably connected to the battery cell support structure and can contact the soft-pack battery cell in the battery cell support structure, one side of the battery cell support structure is provided with an opening for exposing the soft-pack battery cell electrode, and a thermal pad is provided inside the frame of the battery cell support structure away from the opening. 2.根据权利要求1所述的软包电芯散热结构，其特征在于，所述导热垫为导热绝缘垫。2. The soft-pack battery core heat dissipation structure according to claim 1, wherein the thermally conductive pad is a thermally conductive insulating pad. 3.根据权利要求1所述的软包电芯散热结构，其特征在于，所述散热铝片的框架结构为长方形，所述散热铝片的高度小于或等于电芯支撑结构件的高度；所述散热铝片的宽度小于或等于电芯支撑结构件的宽度。3. The soft-pack battery core heat dissipation structure according to claim 1 is characterized in that the frame structure of the heat dissipation aluminum sheet is rectangular, the height of the heat dissipation aluminum sheet is less than or equal to the height of the battery core support structure; the width of the heat dissipation aluminum sheet is less than or equal to the width of the battery core support structure. 4.根据权利要求1所述的软包电芯散热结构，其特征在于，所述导热垫与电芯支撑结构件接触的面上设置有凸台，所述电芯支撑结构件设置有凸台可以嵌入的嵌入孔。4. The soft-pack battery core heat dissipation structure according to claim 1, characterized in that a boss is provided on the surface of the thermal pad that contacts the battery core support structure, and the battery core support structure is provided with an embedding hole into which the boss can be embedded. 5.根据权利要求4所述的软包电芯散热结构，其特征在于，所述散热铝片面向电芯支撑结构件内腔的面上设置有导热介质，所述导热介质为导热硅脂或导热硅胶。5. The soft-pack battery core heat dissipation structure according to claim 4, characterized in that a heat-conducting medium is provided on the surface of the heat dissipating aluminum sheet facing the inner cavity of the battery core support structure, and the heat-conducting medium is thermal grease or thermal silica gel. 6.根据权利要求5所述的软包电芯散热结构，其特征在于，所述散热铝片为“L”型，所述散热铝片与穿过嵌入孔的凸台接触。6. The soft-pack battery core heat dissipation structure according to claim 5, characterized in that the heat dissipation aluminum sheet is "L"-shaped and contacts the boss passing through the embedding hole. 7.根据权利要求1所述的软包电芯散热结构，其特征在于，所述电芯支撑结构件与散热铝片的接触面设置有若干个定位凸起，所述散热铝片上设置有与定位凸起相对应，且可容纳定位凸起的定位孔；所述散热铝片与电芯支撑结构件通过卡扣连接。7. The soft-pack battery cell heat dissipation structure according to claim 1 is characterized in that the contact surface between the battery cell support structure and the heat dissipation aluminum sheet is provided with a plurality of positioning protrusions, and the heat dissipation aluminum sheet is provided with positioning holes corresponding to the positioning protrusions and capable of accommodating the positioning protrusions; the heat dissipation aluminum sheet and the battery cell support structure are connected by a snap fastener. 8.一种电芯组的最小单元，其特征在于，包括权利要求1-7任一项所述的软包电芯散热结构及软包电芯。8. A minimum unit of a battery cell group, characterized by comprising the soft-pack battery cell heat dissipation structure and the soft-pack battery cell according to any one of claims 1 to 7. 9.根据权利要求8所述的电芯组的最小单元，其特征在于，一个所述软包电芯散热结构的内部承载一至四个软包电芯，所述电芯支撑结构件的材质选用工程塑料，所述软包电芯的底部与导热垫接触，靠近散热铝片的软包电芯与散热铝片接触，所述软包电芯与软包电芯的接触面及软包电芯与散热铝片的接触面之间设置有导热介质，所述导热介质为导热硅脂或导热硅胶。9. The minimum unit of the battery cell group according to claim 8 is characterized in that one of the soft-pack battery cell heat dissipation structures carries one to four soft-pack battery cells, the battery cell support structure is made of engineering plastic, the bottom of the soft-pack battery cell contacts the thermal pad, the soft-pack battery cell close to the heat dissipation aluminum sheet contacts the heat dissipation aluminum sheet, and a heat conductive medium is provided between the contact surfaces between the soft-pack battery cells and the contact surfaces between the soft-pack battery cells and the heat dissipation aluminum sheet, and the heat conductive medium is thermal grease or thermal silica gel. 10.一种电芯组，其特征在于，由两个以上的权利要求8-9任一项所述的电芯组的最小单元组成。10. A battery cell group, characterized in that it is composed of two or more minimum units of the battery cell group according to any one of claims 8 to 9.
CN202422313064.9U 2024-09-23 2024-09-23 A soft-pack battery core heat dissipation structure, a minimum unit of a battery core group, and a battery core group Active CN223333849U (en)

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