Soft package battery cell fixing structure, soft package battery cell module and soft package battery cell module

Abstract

According to the softly-packaged battery cell fixing structure, the softly-packaged battery cell module and the softly-packaged battery cell module provided by the utility model, the plastic frame body which is only in contact with the narrow side edge of the softly-packaged battery cell and provides support is arranged, so that the wrapping area of the plastic frame body with a poor heat dissipation effect on the softly-packaged battery cell is reduced; by arranging the two side turnups on the two sides of the heat dissipation plate body, the contact area of the soft package battery cell and the heat dissipation plate is increased; and the lower turnup wraps the outer side of the lower frame, so that the heat of the soft package battery cell can be conducted to the lower turnup through the heat dissipation plate body and the side turnup to be led out. On the basis, the utility model further provides a soft package battery cell module, the soft package battery cell module comprises a water cooling plate, and when a plurality of battery cell modules are stacked, the lower turnup edge at the bottom of the heat dissipation plate body is attached to the plate body, so that heat of the heat dissipation plate is conducted to the water cooling plate, and a better heat dissipation effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field especially relates to a soft package electric core fixed structure, soft package electric core module and soft package electric core module. BACKGROUND

[0002] The soft package electric core is a common lithium ion electric core, and its shell is usually made of aluminum plastic film, so it is named "soft package". This kind of electric core has certain flexibility in structure, and can be customized into different shapes and sizes according to needs, which makes it have advantages in space utilization and design. Because the soft package electric core has the characteristics of good safety performance, light weight, large capacity, small internal resistance and flexible design, its application in 3C field, power field and energy storage field is more and more widely.

[0003] In the prior art, plastic glue frame is often used to fix the soft package electric core, so that multiple soft package electric cores are combined into a group. But this method will cause the overall state of the soft package electric core group to be not firm. And this fixing method of simply using plastic glue frame may not provide enough support and constraint. When the soft package electric core group is subjected to external force or internal pressure change, the position of the electric core may move, resulting in large size error of the soft package electric core group. Moreover, this fixing method will also cause the flatness of the two sides of the soft package electric core group to be poor, which is not conducive to the use of steel belt to bundle it. Because of the unstable structure, the protective film of the soft package electric core is also easy to be damaged during grouping, which may cause fire. More importantly, the existing plastic glue frame structure has poor thermal conductivity, although it can provide certain support strength, but it cannot heat the soft package electric core in time, which leads to low working efficiency of the heat management system, and the soft package electric core has the risk of thermal runaway. UTILITY MODEL CONTENTS

[0004] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the utility model is how to provide a soft package electric core fixing structure, soft package electric core module and soft package electric core module which can provide stable strength support and good heat dissipation effect.

[0005] To achieve the above object and other related objects, the first aspect of the present application provides a soft package battery cell fixing structure, comprising: a support frame and a heat dissipation plate; wherein the support frame comprises an upper edge frame, a lower edge frame and two side edge frames, the side edge frames, the upper edge frame and the lower edge frame enclose an installation cavity with two open sides, and the soft package battery cell is arranged in the installation cavity; the heat dissipation plate comprises a heat dissipation plate body, two side turning edges arranged on both sides of the heat dissipation plate body and a lower turning edge arranged at the bottom of the heat dissipation plate body, the two side turning edges are respectively inserted into the gap between the soft package battery cell and the two side edge frames, the lower turning edge is wrapped on the outside of the lower edge frame, the heat dissipation plate body covers the side opening of the installation cavity and is attached to the soft package battery cell, and the heat of the soft package battery cell can be conducted to the lower turning edge through the heat dissipation plate body and the side turning edges.

[0006] In an embodiment of the first aspect of the present application, the upper and lower edge frames of the support frame are provided with a plurality of protrusions on one side, and the upper and lower ends of the heat dissipation plate body are respectively provided with a plurality of mounting holes matched with the protrusions, when the heat dissipation plate body covers the side opening of the installation cavity, the protrusions and the mounting holes are mutually clamped and fixed.

[0007] In an embodiment of the first aspect of the present application, it further comprises a heat conduction sheet; the heat conduction sheet is wrapped and attached on the side surface of the soft package battery cell and the heat dissipation plate in contact.

[0008] To achieve the above object and other related objects, the second aspect of the present application provides a soft package battery cell module, comprising: a soft package battery cell and the soft package battery cell fixing structure of any one of the first aspect of the present application.

[0009] In an embodiment of the second aspect of the present application, a first rectangular groove is arranged at the side edge of the upper end surface of the soft package battery cell; when the soft package battery cell is arranged inside the installation cavity, the first rectangular groove and a part of the upper edge frame of the frame are mutually abutted, thereby playing a limiting role.

[0010] In an embodiment of the second aspect of the present application, a tooth-shaped clamping part is arranged on the upper end surface of the soft package battery cell, and a tooth-shaped groove corresponding to the tooth-shaped clamping part is arranged on the upper edge frame of the support frame; when the soft package battery cell is arranged inside the installation cavity, the tooth-shaped clamping part and the tooth-shaped groove are mutually clamped and fixed.

[0011] In an embodiment of the second aspect of the present application, further comprising: a limiting foam, a second rectangular groove is opened on one side of the lower frame of the support frame body, a third rectangular groove and a fourth rectangular groove are respectively arranged on the two side frames of the support frame body, and the second rectangular groove, the third rectangular groove, the fourth rectangular groove and the tooth-shaped groove are located on the same side of the support frame body. The limiting foam is arranged in the second rectangular groove, the third rectangular groove and the fourth rectangular groove, and when the soft package battery cell is arranged in the mounting cavity, the limiting foam can abut against the soft package battery cell.

[0012] In an embodiment of the second aspect of the present application, further comprising: a buffer foam, the buffer foam is capped on the side of the support frame body away from the heat dissipation plate.

[0013] To achieve the above object and other related objects, the third aspect of the present application provides a soft package battery cell module, comprising: a plurality of soft package battery cell modules according to any one of the second aspect of the present application, the plurality of soft package battery cell modules are longitudinally stacked; a water cooling plate, the water cooling plate comprises a plate body, a water outlet and a water inlet; when the plurality of soft package battery cell modules are stacked, the lower edge of the heat dissipation plate body is placed on the plate body to conduct heat from the heat dissipation plate to the water cooling plate.

[0014] In an embodiment of the third aspect of the present application, a positioning pin and / or a slot are arranged on one side frame of the support frame body, and a slot and / or a positioning pin corresponding to the positioning pin are arranged at a corresponding position of the other side frame; when the soft package battery cell modules are stacked, the positioning pin and / or the slot of each soft package battery cell module are fixed by being clamped with the corresponding slot and / or positioning pin of the soft package battery cell module adjacent to it.

[0015] As described above, the soft package battery cell fixing structure, the soft package battery cell module and the soft package battery cell module of the present application have the following beneficial effects:

[0016] The application provides a soft package battery cell fixing structure, a soft package battery cell module, and a soft package battery cell module group.

[0017] In addition, the application further provides a soft package battery cell module group, which comprises a plurality of the aforementioned soft package battery cell modules, and the plurality of soft package battery cell modules are longitudinally stacked; and a water cooling plate, which comprises a plate body, a water outlet and a water inlet; when the plurality of battery cell modules are stacked with each other, the lower flanges at the bottom of the heat dissipation plate bodies are placed in close contact with the plate body, so as to conduct the heat of the heat dissipation plate to the water cooling plate. By arranging the water cooling plate, the heat of the soft package battery cell can be conducted from the lower flanges of the heat dissipation plate to the water cooling plate, so that the heat on the soft package battery cell can be quickly taken away by the heat dissipation plate, thereby achieving better heat dissipation effect.

[0018] The soft package battery cell fixing structure, the soft package battery cell module and the soft package battery cell module group of the application support and fix the soft package battery cell through the support frame, dissipate heat from the side of the soft package battery cell with the highest heat dissipation requirement through the side flanges of the heat dissipation plate, and conduct the heat from the bottom of the heat dissipation plate to the outside through the lower flange, so that the heat is absorbed by the air or the water cooling device outside, thereby solving the problem that the battery cell fixing structure or the battery cell module in the prior art cannot provide stable strength support and has good heat dissipation effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 An exploded view of the structure of the soft package battery cell module in an embodiment of the application is shown.

[0020] Figure 2Shown is a schematic structural diagram of a heat dissipation plate in one embodiment of the present application;

[0021] Figure 3 Shown is a schematic structural diagram of a heat conducting sheet in one embodiment of the present application;

[0022] Figure 4 Shown is a schematic diagram of the structure of a soft-pack battery cell in one embodiment of the present application;

[0023] Figure 5 Shown is a schematic diagram of the structure of the limiting foam in one embodiment of the present application;

[0024] Figure 6 Shown is a structural schematic diagram of a support frame in one embodiment of the present application;

[0025] Figure 7 Shown is a schematic diagram of the structure of the assembled soft-pack battery module in one embodiment of the present application Figure 1 ;

[0026] Figure 8 Shown is a schematic diagram of the structure of the assembled soft-pack battery module in one embodiment of the present application Figure 2 ;

[0027] Figure 9 Shown is a front view of a soft-pack battery cell module (excluding a water cooling plate) in one embodiment of the present application;

[0028] Figure 10 Shown is a schematic structural diagram of a water cooling plate in one embodiment of the present application;

[0029] Figure 11 Shown is a structural schematic diagram of a soft-pack battery cell module (including a water cooling plate) in one embodiment of the present application.

[0030] Component number description

[0031] 1 heat sink

[0032] 11 mounting holes

[0033] 12 body

[0034] 13 Side Flanging

[0035] 14 Bottom flange

[0036] 2 thermal pads

[0037] 3 soft pack battery cells

[0038] 31 toothed engagement portion

[0039] 32 First rectangular slot

[0040] 4. Limiting foam

[0041] 5 support frame

[0042] 51 upper frame

[0043] 511 toothed groove

[0044] 52 lower frame

[0045] 53 side frame

[0046] 54 mounting cavity

[0047] 55 protrusion

[0048] 56 positioning pin

[0049] 57 slot

[0050] 6 buffer foam

[0051] 61 rectangular chamfer

[0052] 7 water-cooled plate DETAILED DESCRIPTION

[0053] The embodiments of the present application will be described in detail by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification.

[0054] It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to understand and read the content disclosed in the specification by those skilled in the art, and are not used to limit the limiting conditions that the present application can be implemented, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects that the present application can produce and the purposes that the present application can achieve, should still fall within the scope of the technical content disclosed by the present application. The following detailed description should not be considered as limiting, and the scope of the embodiments of the present application is only limited by the claims of the published patent. The terms used herein are only used to describe the specific embodiments, and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "under", "lower", "above", "upper", etc. can be used in the text to facilitate the description of the relationship between one element or feature shown in the figure and another element or feature.

[0055] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," "holding," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0056] Furthermore, as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". Exceptions to this definition occur only when the combination of elements, functions, or operations is inherently mutually exclusive in some way.

[0057] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the following embodiments and the accompanying drawings are used to further illustrate the technical solutions in the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0058] like Figures 1-9 As shown, the first aspect of the present invention provides a soft-pack battery cell fixing structure, comprising: a support frame 5 and a heat dissipation plate 1, wherein:

[0059] like Figures 6-7 As shown, the support frame 5 includes an upper frame 51, a lower frame 52 and two side frames 53. The side frames 53, the upper frame 51 and the lower frame 52 form an installation cavity 54 with openings on both sides. The soft-pack battery cell 3 is arranged in the installation cavity 54.

[0060] It should be understood that the support frame 5 of the soft-pack battery cell 3 generally needs to have a certain mechanical strength to maintain the shape and position of the battery cell, and at the same time should have a certain elasticity when the battery cell expands or shrinks. The material of the support frame 5 can be plastic, metal or other composite materials, and the specific choice of material depends on design requirements, cost considerations and manufacturing processes. Preferably, in an embodiment of the utility model, the material of the support frame 5 is plastic. Plastic material is generally lighter than metal material, which helps to reduce the weight of the battery pack, thereby improving energy efficiency and mileage; secondly, plastic material is easy to shape and process, and can be made into different shapes and sizes according to needs to adapt to various battery cell specifications and design requirements; thirdly, plastic is a poor conductor of electricity, and using plastic as the support frame 5 can provide good electrical insulation performance and increase the safety of the battery pack; fourthly, plastic material has good corrosion resistance to acids, bases, salts and other chemicals, and is suitable for battery pack applications in various environmental conditions; finally, plastic material generally has lower cost, which can reduce the overall manufacturing cost of the battery pack. It should be understood that the aforementioned support frame 5 made of plastic material does not constitute a limitation on the material of the support frame 5 of the utility model, and any material that has a certain mechanical strength to maintain the shape and position of the battery cell can be used as the material of the support frame 5 of the utility model.

[0061] As shown in Figure 2 The heat dissipation plate 1 includes a heat dissipation plate body 12, two side flanges 13 arranged on both sides of the heat dissipation plate body 12, and a lower flange 14 arranged at the bottom of the heat dissipation plate body 12. The two side flanges 13 are respectively inserted into the gap between the soft-pack battery cell 3 and the two side frames 53, and the lower flange 14 is wrapped outside the lower frame 52. The heat dissipation plate body 12 covers one side opening of the mounting cavity 54 and is in close contact with the soft-pack battery cell 3. The heat of the soft-pack battery cell 3 can be conducted to the lower flange 14 through the heat dissipation plate body 12 and the side flanges 13 and then dissipated.

[0062] It should be understood that in actual application, the heat generation of the side surface of the soft package battery cell 3 with a smaller area (in the thickness direction) is more serious than that of the front and back surfaces with a larger area. First, the arrangement between the pole pieces inside the soft package battery cell is relatively difficult to be completely uniform and consistent in the thickness direction under the lamination or winding process. This non-uniformity will lead to uneven distribution of current in the thickness direction, and the area with concentrated current has larger resistance. According to Joule's law, the greater the resistance, the more serious the heat generation. Moreover, during the charging and discharging process, the pole pieces will swell and shrink, and the gap between the pole pieces in the thickness direction is more likely to be restricted, which will further exacerbate the unevenness of the current distribution, thus making the heat generation of the side surface more obvious. Second, the packaging material of the soft package battery cell is an aluminum plastic film, which has relatively poor heat conduction performance in the thickness direction. This means that the heat generated inside the battery cell is relatively difficult to conduct out quickly in the thickness direction, and the heat is easy to accumulate in the side surface, causing the temperature of the side surface to rise. Moreover, there may be incomplete sealing at the edge of the aluminum plastic film, which will make it easier for external air or moisture to enter the side surface of the battery cell, triggering some side reactions, thus generating additional heat and aggravating the heat generation of the side surface. Third, during the charging and discharging process, lithium ions need to shuttle back and forth between the positive and negative electrodes. Due to the non-uniformity of the internal structure and materials of the battery cell, the transmission of lithium ions in the thickness direction may be hindered, leading to uneven distribution of lithium ion concentration in the side surface area. This uneven lithium ion concentration will trigger local electrode polarization, causing changes in the reaction rate and heat generation of the electrode, and the electrode polarization in the side surface area may be more serious, thus leading to more serious heat generation. In addition, there may be differences in the reaction activity of the electrodes of the soft package battery cell in the thickness direction, which is related to factors such as the preparation process of the electrode material and the microstructure of the electrode. The area with higher reaction activity will generate more heat, and in the thickness direction, this non-uniformity of reaction activity may be more prominent, making the heat generation of the side surface relatively more serious. Therefore, compared with the front and back surfaces of the soft package battery cell 3 with a larger area, the heat dissipation demand of the side surface with a smaller area (in the thickness direction) is more intense. In the present utility model, the heat dissipation plate 1 is provided with two side flanges 13 located on both sides of the heat dissipation plate body 12, which not only increases the contact area between the heat dissipation plate 1 and the soft package battery cell 3, but also covers the side edges of the soft package battery cell 3 with higher temperature and more urgent heat dissipation demand, so that the heat of the side surface of the soft package battery cell 3 can be taken away by the heat dissipation plate 1, improving the heat dissipation efficiency. Preferably, the material of the heat dissipation plate 1 is aluminum, which has good thermal conductivity, and is relatively light in density, light in weight and low in cost. In addition, aluminum has certain corrosion resistance, which is safer for wrapping soft package batteries. Moreover, the aluminum profile heat sink has high strength and can withstand large thermal stress and mechanical stress.

[0063] As Figure 1 and Figure 6As shown, in an embodiment of the first aspect of the present application, a plurality of protrusions 55 are provided on one side of the upper and lower frames of the support frame 5, such as Figure 1 and Figure 2 As shown, a plurality of mounting holes 11 cooperating with the protrusions 55 are respectively provided at the upper and lower ends of the heat sink body 12. When the heat sink body 12 covers one side opening of the mounting cavity 54, the protrusions 55 and the mounting holes 11 are engaged and fixed with each other.

[0064] It should be understood that, in addition to the aforementioned connection through the engagement of the protrusions 55 with the mounting holes 11 , the heat sink 1 and the support frame 5 may also be connected and fixed by bolt connection, riveting, bonding, or the like.

[0065] like Figure 3 As shown, in an embodiment of the first aspect of the present application, a heat conductive sheet 2 is further included; the heat conductive sheet 2 is arranged between the soft-pack battery cell 3 and the heat dissipation plate 1, and is coated and adhered to the surface of the soft-pack battery cell 3 that is in contact with the heat dissipation plate 1.

[0066] In the present invention, the thermally conductive sheet 2 is arranged between the soft-pack battery cell 3 and the heat sink 1, which can improve the heat conduction efficiency between the soft-pack battery cell 3 and the heat sink 1, evenly distribute heat, prevent thermal runaway, and enhance battery performance. In actual applications, there may be an installation gap between the soft-pack battery cell 3 and the heat sink 1. This is because the machined surface cannot be completely flat, and there are tiny gaps between the heat sink and the battery cell. The air in these gaps is a poor conductor of heat. The thermally conductive sheet 2 can effectively fill these gaps and reduce the air thermal resistance. In addition, the thermally conductive sheet 2 can also reduce the contact surface changes caused by different thermal expansion coefficients and maintain a stable thermal resistance. Through more effective heat conduction, the soft-pack battery cell 3 can be prevented from overheating, thereby improving the safety and life of the battery. Preferably, in one embodiment of the present application, the thermally conductive sheet 2 is a thermally conductive silicone sheet. The thermally conductive silicone sheet material is relatively soft and has good compressibility. It can adapt to products and structures of different shapes and effectively fill the gaps on the contact surface. Secondly, the thermally conductive silicone sheet has excellent thermal conductivity and electrical insulation properties, can operate in high-temperature environments, and resist chemical corrosion. Thirdly, the thermal resistance of the thermally conductive silicone sheet is very low, which can effectively reduce the operating temperature of the product. In addition, the service life of the thermally conductive silicone sheet can generally reach 8 to 10 years, or even longer, so its durability is even better. It should be understood that the fact that the thermally conductive sheet 2 is a thermally conductive silicone sheet does not constitute a limitation on the material of the thermally conductive sheet 2 of the present application.

[0067] To achieve the above-mentioned purpose and other related purposes, the second aspect of the present application provides a soft-pack battery cell module, including: a soft-pack battery cell 3, and the soft-pack battery cell fixing structure described in any one of the first aspects of the present application.

[0068] like Figure 4As shown in the embodiment of the second aspect of the present application, a first rectangular groove 32 is formed at the side edge of the upper end surface of the soft package battery cell 3. When the soft package battery cell 3 is arranged inside the mounting cavity 54, the first rectangular groove 32 abuts against a part of the upper frame 51 of the frame body, thereby playing a limiting role.

[0069] Also, as shown in the embodiment of the second aspect of the present application, a tooth-shaped engaging portion 31 is arranged at the upper end surface of the soft package battery cell 3, and a tooth-shaped groove 511 corresponding to the tooth-shaped engaging portion 31 is formed on the upper frame 51 of the support frame body 5. When the soft package battery cell 3 is arranged inside the mounting cavity 54, the tooth-shaped engaging portion 31 and the tooth-shaped groove 511 are engaged with each other to be fixed. Figure 4 As shown in the embodiment of the second aspect of the present application, a tooth-shaped engaging portion 31 is arranged at the upper end surface of the soft package battery cell 3, and a tooth-shaped groove 511 corresponding to the tooth-shaped engaging portion 31 is formed on the upper frame 51 of the support frame body 5. When the soft package battery cell 3 is arranged inside the mounting cavity 54, the tooth-shaped engaging portion 31 and the tooth-shaped groove 511 are engaged with each other to be fixed.

[0070] Figure 5 As shown in the embodiment of the second aspect of the present application, a tooth-shaped engaging portion 31 is arranged at the upper end surface of the soft package battery cell 3, and a tooth-shaped groove 511 corresponding to the tooth-shaped engaging portion 31 is formed on the upper frame 51 of the support frame body 5. When the soft package battery cell 3 is arranged inside the mounting cavity 54, the tooth-shaped engaging portion 31 and the tooth-shaped groove 511 are engaged with each other to be fixed.

[0071] ​It should be understood that when the soft package battery cell 3 is wrapped by the heat conduction sheet 2 and the heat dissipation plate 1, the limiting foam 4 is arranged between the heat dissipation plate 1 and the support frame 5, so as to reduce the influence of the assembly gap between the heat dissipation plate 1 and the support frame 5 and enhance the structural stability.

[0072] It should be understood that the limiting foam 4 mentioned in the embodiment is one of the materials of the limiting structure between the soft package battery cell 3 and the support frame 5, and the limiting foam 4 can also be replaced by other materials such as rubber, silica gel, polymer foam or other types of flexible materials. Preferably, the limiting foam 4 in the embodiment has the characteristics of large elasticity and light weight, has good buffering performance, can absorb the energy generated by external impact or vibration, and protects the battery cell from mechanical damage; and can also help to disperse the heat generated by the battery cell, because it can act as an intermediate for heat conduction, conducting heat from the battery cell to the support frame 5, and then dissipating the heat to the environment by the support frame 5.

[0073] As shown in Figure 1 and Figure 8 , in an embodiment of the second aspect of the application, further comprising: a buffer foam 6, the buffer foam 6 is capped on the side opening of the support frame 5 away from the heat dissipation plate 1.

[0074] It should be understood that rectangular chamfers 61 are arranged at the four corners of the buffer foam 6 respectively, so that the buffer foam 6 and the support frame 5 are more matched when installed. It should be understood that, like the aforementioned limiting foam 4, the buffer foam 6 can also be replaced by other materials such as rubber, silica gel, polymer foam or other types of flexible materials.

[0075] To achieve the above object and other related objects, the third aspect of the application provides a soft package battery cell module, comprising: a plurality of soft package battery cell modules according to any one of the second aspect of the application, as shown in Figure 9 , the plurality of soft package battery cell modules are vertically stacked.

[0076] As shown in Figure 10 and Figure 11 , the soft package battery cell module further comprises a water cooling plate 7, the water cooling plate comprises a plate body, a water outlet and a water inlet; when the plurality of battery cell modules are stacked on each other, the lower flanges 14 at the bottom of the heat dissipation plate bodies 12 are placed in close contact with each other, so as to conduct the heat of the heat dissipation plate 1 to the water cooling plate 7.

[0077] It should be understood that when the soft package battery cell 3 works and generates heat, the heat is first transferred from the battery cell to the heat sink 1 in direct contact with the battery cell by heat conduction. The heat sink 1 is usually made of a material with high thermal conductivity (such as the preferred aluminum plate of the present application), which has a high thermal conductivity coefficient and can quickly absorb and diffuse the heat generated by the battery cell. After the heat sink 1 absorbs the heat, the surface temperature of the heat sink 1 rises. At this time, if there is a temperature difference between the contact surface of the heat sink 1 and the water-cooled plate, heat convection will occur. The water-cooled plate is designed with fluid channels inside, and the cooling liquid circulates under the action of the pump. When the cooling liquid flows through the heat sink 1, it absorbs the heat on the surface of the heat sink 1, causing the temperature of the cooling liquid to rise. Then the cooling liquid carries the heat absorbed from the heat sink 1 to the radiator or cooling device, and finally dissipates the heat to the environment.

[0078] In an embodiment of the third aspect of the present application, a positioning pin 56 and / or a slot 57 are arranged on one side of the frame 53 of the support frame 5, and a slot 57 and / or a positioning pin 56 corresponding to the positioning pin 56 are arranged on the other side of the frame 53; when the battery cell modules are stacked on each other, the positioning pin 56 and / or the slot 57 of each battery cell module are clamped and fixed with the corresponding slot 57 and / or positioning pin 56 of the battery cell module adjacent to it.

[0079] In summary, the soft package battery cell fixing structure and the soft package battery cell module provided by the application, the soft package battery cell fixing structure comprises a support frame 5 and a heat dissipation plate 1; wherein the support frame 5 comprises an upper edge frame 51, a lower edge frame 52 and two side edge frames 53, the side edge frame 53, the upper edge frame 51 and the lower edge frame 52 form an installation cavity 54 with two open sides, and the soft package battery cell 3 is arranged in the installation cavity 54; this method greatly reduces the wrapping area of the soft package battery cell 3 by the plastic frame with poor heat dissipation effect, the support frame only contacts and supports the narrow side of the soft package battery cell 3, and the heat dissipation plate 1 is used to cover and fit the front surface (or the back surface) with a larger area and the left and right side surfaces with a smaller area of the soft package battery cell 3, so as to enhance the heat dissipation effect of the soft package battery cell 3. Moreover, the heat dissipation plate 1 comprises a heat dissipation plate body 12, two side turning edges 13 arranged on both sides of the heat dissipation plate body 12 and a lower turning edge 14 arranged at the bottom of the heat dissipation plate body 12, the two side turning edges 13 are respectively inserted into the gap between the soft package battery cell 3 and the two side edge frames 53, the lower turning edge 14 is wrapped outside the lower edge frame 52, the heat dissipation plate body 12 covers one side opening of the installation cavity 54 and is in contact with the soft package battery cell 3, and the heat of the soft package battery cell 3 can be conducted to the lower turning edge 14 through the heat dissipation plate body 12 and the side turning edges 13 and then conducted to the outside. By arranging the two side turning edges 13 and the lower turning edge 14 of the heat dissipation plate 1, the two side turning edges 13 are in contact with the narrow side of the soft package battery cell 3, and the heat dissipation plate body 12 is in contact with the front surface (or the back surface) with a larger area of the soft package battery cell, so that the contact area of the heat dissipation plate 1 and the soft package battery cell 3 is increased, and the lower turning edge 14 is wrapped outside the lower edge frame 52, so that the heat on the heat dissipation plate 1 can be conducted to the outside through the lower turning edge 14.

[0080] In addition, the application also provides a soft package battery cell module, comprising: a plurality of the aforementioned soft package battery cell modules, and the plurality of soft package battery cell modules are vertically stacked; a water cooling plate 7, the water cooling plate comprises a plate body, a water outlet and a water inlet; when a plurality of the battery cell modules are stacked with each other, the lower turning edges 14 at the bottom of the heat dissipation plate bodies 12 are placed in contact with each other, so as to conduct the heat of the heat dissipation plates 1 to the water cooling plate 7. By arranging the water cooling plate 7, the heat of the soft package battery cell 3 can be conducted to the water cooling plate 7 from the lower turning edges 14 of the heat dissipation plates 1, so that the heat on the soft package battery cell 3 can be taken away by the heat dissipation plates 1 more quickly, and a better heat dissipation effect is achieved.

[0081] The soft package battery core fixing structure, the soft package battery core module and the soft package battery core module have the advantages that the soft package battery core is supported and fixed by the support frame body 5, the side of the soft package battery core with the highest heat dissipation requirement is dissipated by the side turning edge of the heat dissipation plate, heat is led out from the bottom of the heat dissipation plate to the outside by the lower turning edge, the heat is absorbed by the air or the water cooling device outside, and the problem that the battery core fixing structure or the battery core module in the prior art cannot provide stable strength support and has good heat dissipation effect is solved.

[0082] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0083] The above-mentioned embodiments only exemplarily illustrate the principles and effects of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and category of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A soft-pack battery cell fixing structure, characterized in that: include: Support frame (5) and heat dissipation plate (1); wherein, The support frame (5) comprises an upper frame (51), a lower frame (52) and two side frames (53); the side frames (53), the upper frame (51) and the lower frame (52) enclose a mounting cavity (54) with openings on both sides; the soft-pack battery cell (3) is arranged in the mounting cavity (54); The heat dissipation plate (1) comprises a heat dissipation plate body (12), two side flanges (13) arranged on both sides of the heat dissipation plate body (12), and a lower flange (14) arranged at the bottom of the heat dissipation plate body (12); the two side flanges (13) are respectively inserted into the gaps between the soft-pack battery cell (3) and the two side frames (53); the lower flange (14) is covered on the outside of the lower frame (52); the heat dissipation plate body (12) covers one side opening of the installation cavity (54) and is fitted with the soft-pack battery cell (3); the heat of the soft-pack battery cell (3) can be conducted to the lower flange (14) through the heat dissipation plate body (12) and the side flanges (13) and then discharged.

2. A soft-pack battery core fixing structure according to claim 1, characterized in that: A plurality of protrusions (55) are provided on one side of the upper and lower frames of the support frame (5), and a plurality of mounting holes (11) matching the protrusions (55) are provided on the upper and lower ends of the heat dissipation plate body (12). When the heat dissipation plate body (12) covers an opening on one side of the mounting cavity (54), the protrusions (55) and the mounting holes (11) are engaged and fixed with each other.

3. The soft-pack battery core fixing structure according to claim 1, characterized in that: It also includes a heat conducting sheet (2); the heat conducting sheet (2) is arranged between the soft-pack battery core (3) and the heat dissipation plate (1), and covers and adheres to the surface of the soft-pack battery core (3) in contact with the heat dissipation plate (1).

4. A soft-pack battery cell module, characterized in that: include: A soft-pack battery cell (3), and a soft-pack battery cell (3) fixing structure according to any one of claims 1 to 3.

5. The soft-pack battery cell module according to claim 4, characterized in that: A first rectangular groove (32) is provided at one edge of the upper end surface of the soft-packed battery cell (3); when the soft-packed battery cell (3) is arranged inside the mounting cavity (54), the first rectangular groove (32) abuts against a portion of the upper frame (51) of the frame, thereby playing a limiting role.

6. The soft-pack battery cell module according to claim 4, characterized in that: A toothed engaging portion is provided on the upper end surface of the soft-packed battery core (3); a toothed groove (511) corresponding to the toothed engaging portion (31) is provided on the upper frame (51) of the support frame (5); when the soft-packed battery core (3) is arranged inside the installation cavity (54), the toothed engaging portion (31) and the toothed groove (511) are mutually engaged and fixed.

7. The soft-pack battery cell module according to claim 4, characterized in that: Also includes: A limiting foam (4) is provided with a second rectangular groove on one side of the lower frame (52) of the support frame (5), and a third rectangular groove and a fourth rectangular groove are respectively provided on the two side frames (53) of the support frame (5), and the second rectangular groove, the third rectangular groove, the fourth rectangular groove and the tooth-shaped groove (511) are located on the same side of the support frame (5); the limiting foam (4) is placed in the second rectangular groove, the third rectangular groove and the fourth rectangular groove, and when the soft-pack battery cell (3) is arranged in the installation cavity (54), the limiting foam (4) can abut against the soft-pack battery cell (3).

8. The soft-pack battery cell module according to claim 4, characterized in that: Also includes: Buffering foam (6), the buffering foam (6) covers an opening on a side of the supporting frame (5) away from the heat dissipation plate (1).

9. A soft-pack battery module, characterized in that: include: Several soft-pack battery cell (3) modules according to any one of claims 4 to 8, wherein the several soft-pack battery cell (3) modules are stacked longitudinally; A water-cooling plate (7), comprising a plate body, a water outlet, and a water inlet; when a plurality of the battery cell modules are stacked on each other, the lower flanges (14) at the bottom of the heat dissipation plate body (12) are placed in contact with each other to conduct heat from the heat dissipation plate (1) to the water-cooling plate (7).

10. The soft-pack battery cell module according to claim 9, characterized in that: A positioning pin (56) and / or a notch (57) is provided on one side of the frame (53) of the support frame (5), and a notch (57) and / or a positioning pin (56) that match the positioning pin (56) are provided at a corresponding position on the other side of the frame (53); when the battery modules are stacked on each other, the positioning pin (56) and / or notch (57) of each battery module is engaged and fixed with the notch (57) and / or positioning pin (56) corresponding to another battery module adjacent thereto.

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