CN218333961U - Battery pack and electrical equipment - Google Patents

Abstract

The application provides a battery pack and electrical equipment, which relate to the technical field of power batteries. The battery pack includes: a plurality of battery cells, with adjacent or opposite first connection ends and second connection ends, the first connection ends are configured for charging and discharging; the graphite sheet structure is arranged on one side of the battery cells, And at least a part of the graphite sheet structure is configured to be detachably connected to the second connection end. The battery core is provided with a second connection end adjacent to or opposite to the first connection end, and the graphite sheet structure is configured to be detachably connected to the second connection end, which can facilitate the disassembly of the battery core and the graphite sheet structure without damaging the battery. The blue film insulation layer of the core effectively improves the maintainability.

Description

Battery pack and electrical equipment

technical field

The present application relates to the technical field of power batteries, in particular, to a battery pack and electrical equipment.

Background technique

The battery pack is the power source of the electric vehicle, and the smallest unit is the battery cell; there are two main structural methods in the market at this stage, MTP (Module to Pack) and CTP (Cell to Pack), the traditional battery pack MTP is the battery, module In the form of forming a battery pack, multiple batteries form a module, and multiple modules plus BMS, counterweight module and other components are combined into a battery pack. Under the MTP structure, the cells are fully protected by the external structural parts, so the structural strength is good, and the difficulty of grouping is small. Compared with MTP, CTP saves the intermediate module link. CTP technology directly groups the cells into Packs, eliminating the need to assemble traditional modules. The cells are first integrated into the battery pack and then installed on the vehicle body. , the essence is to increase energy density and reduce costs.

In the related technology, the grouping efficiency of CTP battery packs is very high, but the rigidity of the whole pack is relatively poor. At present, structural heat-conducting adhesive is used to fill it up, and then paste it directly to the lower box. When it needs to be disassembled , Even if special tools are used, risks such as liquid leakage and thermal runaway are likely to occur, and it is impossible to disassemble and replace new batteries.

Utility model content

The purpose of the present application is to provide a battery pack and an electric device, which can disassemble the battery cells and effectively improve the maintainability.

In order to achieve the above-mentioned purpose, the application adopts the following technical solutions:

In a first aspect, the present application provides a battery pack, including: a plurality of battery cells, having adjacent or opposite first connection ends and second connection ends, the first connection ends are configured for charging and discharging; A sheet structure is configured on one side of the battery, and at least a part of the graphite sheet structure is configured to be detachably connected to the second connection end.

In the process of the above realization, the battery cell is provided with a second connection end adjacent to or opposite to the first connection end, and the graphite sheet structure is set to be detachably connected to the second connection end, which can facilitate the connection between the battery cell and the graphite sheet structure. The disassembly of the battery will not damage the blue film insulation layer of the battery, effectively improving the maintainability.

In some embodiments, the graphite sheet structure is recessed with a mounting groove along a direction away from the electric core, and the mounting groove is configured to accommodate a part of the structure of the electric core.

In the process of the above implementation, the graphite sheet structure is provided with an installation groove for connecting the battery cell, which can facilitate the dispensing and positioning of the installation groove, and can perform automatic glue dispensing processing, which improves work efficiency and facilitates the fixing of the battery cell.

In some embodiments, the battery pack further includes a first fixing glue, the first fixing glue is arranged in the installation groove, and is located between the graphite sheet structure and the battery core, so as to form a The detachable connection of the electric core and the graphite sheet structure.

In the process of the above implementation, the first fixing glue is set in the installation groove, so that when the battery is wiped and disassembled, the graphite sheet structure and the area below it can be retained for secondary use without destroying the original heat dissipation structure and electric current. The blue film insulation layer of the cell facilitates the disassembly and analysis of the faulty cell, improves safety, and avoids liquid leakage and thermal runaway.

In some embodiments, the battery pack further includes a liquid cooling structure, the liquid cooling structure is disposed on a side of the graphite sheet structure away from the battery cell, and is fixedly connected to the graphite sheet structure.

In the process of the above implementation, the battery core is connected to the liquid cooling structure through the graphite sheet structure, so that when the battery core is disassembled, the connection between the liquid cooling structure and the graphite sheet structure can be retained, and the composition of the liquid cooling structure and the graphite sheet structure will not be damaged. The heat dissipation structure can be used for secondary use, which greatly reduces the cost.

In some embodiments, the battery pack further includes a second fixing glue, the adhesiveness of the second fixing glue is greater than that of the first fixing glue, and the second fixing glue is configured in the liquid Between the cooling structure and the graphite sheet structure, for forming the fixation between the liquid cooling structure and the graphite sheet structure.

In the process of the above realization, the adhesion of the second fixing glue is greater than that of the first fixing glue, which can facilitate the disassembly and analysis of the faulty battery during the removal of the battery cell, while retaining the graphite sheet structure The connection with the liquid cooling structure greatly reduces the cost.

In some embodiments, the periphery of the graphite sheet structure is provided with a filling groove, and the filling groove is filled with the second fixing glue. The second fixing glue can be conveniently positioned by filling the groove, so as to perform automatic glue dispensing and improve work efficiency.

In some embodiments, the filling groove is disposed on the outer edge of the installation groove. Ensure the consistency of the solid connection between the battery core and the graphite sheet structure, avoid damage to the battery core during removal, and improve product safety.

In some embodiments, the battery pack further includes an end plate, the end plate is disposed on the outer edge of the battery cell, and at least a part of the structure of the end plate is in contact with the graphite sheet structure.

In some embodiments, mounting holes are provided at intervals around the circumference of the graphite sheet, and the mounting holes are provided under the end plate for fixing the graphite sheet structure to the end plate.

In a second aspect, the present application further provides an electric device, including the battery pack as described in any one of the above items.

The electrical equipment provided by the embodiment of the second aspect of the present application includes the battery pack described in the technical solution of the first aspect, and thus has all the technical effects of the above-mentioned embodiments, and will not be repeated here.

Other features and advantages of the present application will be set forth in the ensuing description and, in part, will be apparent from the description, or can be learned by practicing the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so It should be regarded as a limitation on the scope, and users of ordinary skill in the art can also obtain other related drawings based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a battery pack disclosed in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a graphite sheet of a battery pack disclosed in an embodiment of the present application.

reference sign

100, electric core; 200, graphite sheet structure; 201, installation groove; 202, filling groove; 203, installation hole; 300, liquid cooling structure; 400, end plate.

detailed description

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by users of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer" etc. are based on the attached The orientation or positional relationship shown in the figure, or the conventional orientation or positional relationship of the utility model product in use, is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must have Certain orientations, constructed and operative in certain orientations, therefore should not be construed as limitations on the present application. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In the description of this application, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Users of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Example

At this stage, based on technology, process maturity and processing cost considerations, mainstream new energy vehicles at home and abroad all choose the stamped liquid cooling plate solution based on the CTP structure of the power battery pack. This CTP integrated solution has the advantage of high group efficiency. Specifically, : (1) The cold plate is used as the bottom plate of the battery pack, which effectively reduces the space in the Z direction; (2) In terms of thermal management efficiency, the contact area of the flow channel is large, which can effectively reduce the temperature difference between the upper and lower sides of the battery cell When discharging and preheating at low temperature, it can better protect the battery. In addition, the stamped liquid cooling plate is integrated outside the power battery pack as a separate part, which saves space and reduces costs. It can also be separated from wet and dry. If the coolant leaks, it will not mix with the modules and busbars. Such as high-voltage parts contact to form a short circuit, which will not cause safety accidents such as battery pack short circuit and fire. In the long run, it is very conducive to the development requirements of new energy vehicles.

In the process of design, the inventor found that the grouping efficiency of CTP battery packs is very high, but the rigidity of the whole pack is relatively poor. The method currently adopted is: open the window on the bottom insulating film of the battery cell, and use structural heat-conducting adhesive to fill it up. Then glue it directly to the lower box. When in a complex vibration and shock working condition, part of the inertial force of the battery cell is transmitted to the lower box beam through the bottom structure heat-conducting adhesive, and then to the mounting point of the whole package, and the other part is transmitted to the mounting point of the whole package through the end plate. This will improve its CTP battery pack stiffness.

The disadvantage of this method is: the adhesive force of the structural heat-conducting adhesive is very strong, and it is difficult to disassemble the battery cell. Even if a special tool is used, it is easy to cause risks such as liquid leakage and thermal runaway. Low-level problems, unable to disassemble and replace new batteries, the entire battery pack will have to be scrapped, and its production and after-sales maintenance costs are high, which is not conducive to the development of new energy vehicles, and is not conducive to the recycling of battery packs in the future.

In view of this, as shown in FIG. 1 , in a first aspect, the present application provides a battery pack, including: a plurality of battery cells 100 with adjacent or opposite first connection ends and second connection ends, the first connection The terminal is configured for charging and discharging; the graphite sheet structure 200 is configured on one side of the battery cell 100, and at least a part of the graphite sheet structure 200 is configured to be detachable from the second connection end connect.

Exemplarily, the graphite sheet structure 200 is a brand-new heat-conducting and heat-dissipating material, which has a unique grain orientation and conducts heat evenly in two directions. The sheet-like structure can be well adapted to any surface, shielding heat sources and components While improving the performance of consumer electronics. This new natural graphite solution, with high heat dissipation efficiency, small footprint and light weight, conducts heat evenly in both directions, eliminating "hot spot" areas.

It can be understood that the battery cell 100 may be a blade battery cell 100, a soft-pack battery cell 100, a cylindrical battery cell 100, a hard-shell battery cell 100, etc., for example, when the battery cell 100 is a soft-pack battery cell 100, the The first connecting end may be disposed on a side of the battery cell 100 , so that the wire harness isolation plate is connected to the side of the battery cell 100 and the like.

In the above implementation process, the battery cell 100 is provided with a second connection end adjacent to or opposite to the first connection end, and the graphite sheet structure 200 is configured to be detachably connected to the second connection end, which facilitates the connection between the battery cell 100 and the graphite sheet. The disassembly between the structures 200 will not damage the blue film insulation layer of the battery cell 100, effectively improving the maintainability.

As shown in FIG. 2 , the graphite sheet structure 200 is recessed with a mounting groove 201 along a direction away from the battery core 100 , and the mounting groove 201 is configured to accommodate a part of the structure of the battery core 100 . Exemplarily, the installation groove 201 can be set in a square shape, or can be set in other shapes, and the depth and size of the installation groove 201 can be set according to actual conditions, which will not be repeated here.

In the process of the above implementation, the graphite sheet structure 200 is provided with the installation groove 201 for connecting the battery cell 100, which can facilitate the dispensing and positioning of the installation groove 201, and can perform automatic dispensing processing, which improves work efficiency and facilitates electrical connection. Fixing of core 100 .

In some embodiments, the battery pack further includes a first fixing glue, the first fixing glue is arranged in the installation groove 201 and is located between the graphite sheet structure 200 and the battery cell 100, so as to It is used to form a detachable connection between the battery cell 100 and the graphite sheet structure 200 . Exemplarily, the first fixing glue includes but is not limited to thermally conductive gel, which has a weaker adhesive force than the thermally conductive structural glue, and when the battery core 100 is removed, the graphite sheet can be The structure 200 and the area below it are reserved for secondary use, so the original heat dissipation structure will not be damaged. At the same time, due to the weak adhesive force of the thermally conductive gel, when the battery core 100 is removed, the battery core 100 will not be removed. The blue film insulation layer of 100 is damaged, which is convenient for dismantling and analyzing the faulty cell 100.

In the process of the above implementation, the first fixing glue is set in the installation groove 201, so that when the battery cell 100 is wiped and disassembled, the graphite sheet structure 200 and the area below it can be retained for secondary use without destroying the original heat dissipation The structure and the blue film insulation layer of the battery cell 100 facilitate the disassembly and analysis of the faulty battery cell 100, improve safety, and avoid phenomena such as liquid leakage and thermal runaway.

In some embodiments, the battery pack further includes a liquid cooling structure 300, the liquid cooling structure 300 includes but not limited to a liquid cooling plate, the liquid cooling structure 300 and the graphite sheet structure 200 together form a heat dissipation structure, Capable of dissipating heat for the battery cell 100 , the liquid cooling structure 300 is disposed on a side of the graphite sheet structure 200 away from the battery cell 100 , and is fixedly connected to the graphite sheet structure 200 .

In the above implementation process, the battery cell 100 is connected to the liquid cooling structure 300 through the graphite sheet structure 200, so that when the battery cell 100 is disassembled, the connection between the liquid cooling structure 300 and the graphite sheet structure 200 can be retained without damaging the liquid cooling structure. The heat dissipation structure composed of the structure 300 and the graphite sheet structure 200 can be reused, greatly reducing the cost.

In some embodiments, the battery pack further includes a second fixing glue, the second fixing glue includes but not limited to thermally conductive structural glue, and the adhesiveness of the second fixing glue is greater than that of the first fixing glue. Adhesiveness, the second fixing glue is arranged between the liquid cooling structure 300 and the graphite sheet structure 200 for fixing the liquid cooling structure 300 and the graphite sheet structure 200 .

In the process of the above implementation, the adhesiveness of the second fixing glue is greater than that of the first fixing glue, which can facilitate the disassembly and analysis of the faulty battery cell 100 during the removal of the battery cell 100, while retaining the graphite The connection of the chip structure 200 and the liquid cooling structure 300 greatly reduces the cost.

Please refer to FIG. 2 again, the periphery of the graphite sheet structure 200 is provided with filling grooves 202, and the filling grooves 202 are filled with the second fixing glue, wherein the filling grooves 202 are provided with at least four, and the four filling grooves The filling grooves 202 are distributed at four corners of the graphite sheet structure 200 at intervals, and the size and shape of the filling grooves 202 are not specifically limited, and can be set according to actual conditions. The second fixing glue can be conveniently positioned by filling the groove 202, so as to perform automatic glue dispensing and improve work efficiency.

In some embodiments, the filling groove 202 is disposed on the outer edge of the installation groove 201 . Ensure the consistency of the connection between the battery cell 100 and the graphite sheet structure 200, avoid damage to the battery cell 100 during dismantling, and improve product safety.

In some embodiments, the battery pack further includes an end plate 400, the end plate 400 is disposed on the outer edge of the battery cell 100, and at least a part of the end plate 400 has the same structure as the graphite sheet structure 200 contact, the periphery of the graphite sheet is provided with installation holes 203 at intervals, and the installation holes 203 can be provided with at least four, and the four installation holes 203 are distributed at the four corners of the graphite sheet structure 200 at intervals. The hole 203 is provided under the end plate 400 for fixing the graphite sheet structure 200 and the end plate 400. Exemplarily, the fixing method between the end plate 400 and the graphite sheet structure 200 can be Bolts are used for fixing, that is, the bolts are adapted to the installation holes 203 , and then the end plates 400 are fastened to the graphite sheet structure 200 by screwing the bolts.

In a second aspect, the present application further provides an electric device, including the battery pack as described in any one of the above items. Exemplarily, the electrical equipment is a vehicle, and the vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. The interior of the vehicle is provided with a battery pack, and the battery pack can be provided at the bottom, head or tail of the vehicle. The battery pack can be used for power supply of the vehicle, for example, the battery pack can be used as an operating power source of the vehicle. The vehicle may also include a controller and a motor. The controller is used to control the battery pack to supply power to the motor, for example, for starting, navigating, and working power requirements during driving of the vehicle.

The electrical equipment provided by the embodiment of the second aspect of the present application includes the battery pack described in the technical solution of the first aspect, and thus has all the technical effects of the above-mentioned embodiments, and will not be repeated here.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. A battery pack, comprising:

the battery cell comprises a plurality of battery cells and a plurality of battery cells, wherein the battery cells are provided with a first connecting end and a second connecting end which are arranged adjacently or oppositely;

a graphite sheet structure disposed on one side of the cell, and at least a portion of the graphite sheet structure is configured to be detachably connected to the second connection terminal.

2. The battery pack of claim 1, wherein the graphite sheet structure is recessed with a mounting slot in a direction away from the cell, the mounting slot configured to receive a portion of the structure of the cell.

3. The battery pack of claim 2, further comprising a first fixing adhesive, wherein the first fixing adhesive is disposed in the mounting groove and located between the graphite sheet structure and the battery core, so as to form a detachable connection between the battery core and the graphite sheet structure.

4. The battery pack of claim 3, further comprising a liquid cooling structure disposed on a side of the graphite sheet structure away from the electrical core and fixedly connected to the graphite sheet structure.

5. The battery pack of claim 4, further comprising a second fixing glue, wherein the second fixing glue has a higher adhesive property than the first fixing glue, and the second fixing glue is disposed between the liquid cooling structure and the graphite sheet structure to fix the liquid cooling structure and the graphite sheet structure.

6. The battery pack according to claim 5, wherein a filling groove is provided at a periphery of the graphite sheet structure, and the filling groove is filled with the second fixing glue.

7. The battery pack according to claim 6, wherein the filling groove is disposed at an outer edge of the mounting groove.

8. The battery pack of claim 1, further comprising an end plate disposed at an outer edge of the cell, wherein at least a portion of the end plate is in structural contact with the graphite sheet structure.

9. The battery pack of claim 8, wherein the graphite sheet structure is circumferentially spaced apart with mounting holes disposed below the end plate for securing the graphite sheet structure to the end plate.

10. An electrical device comprising a battery pack according to any one of claims 1 to 9.

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