Box body and battery cell module with same

Abstract

The utility model provides a box body and a battery cell module with the same, the box body is used for storing battery cells, the box body comprises a shell, the shell is provided with an accommodating cavity, the top of the shell is provided with a maintenance hole, the maintenance hole is communicated with the accommodating cavity, the accommodating cavity is used for storing the battery cells, and the maintenance hole is arranged corresponding to the battery cells; and the upper cover is detachably arranged on the shell, and the upper cover can shield the maintenance hole. According to the technical scheme provided by the invention, the problem that the liquid cooling PACK and the battery cell module do not have maintainability due to the fact that the box cover and the box body are connected through potting and cementing schemes in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core modules, and in particular to a box and a battery core module having the same. Background Art

[0002] The liquid cooling PACK and the battery module are energy storage structures. In the prior art, the liquid cooling PACK and the battery module usually include a box cover and a box body. The battery cell is arranged in the box body, and the box cover and the box body are fixed together by potting, gluing, etc. However, in such a configuration, the box cover cannot be opened. When the liquid cooling PACK and the battery module fail, the battery cell in the box body cannot be repaired, and the system is not maintainable. Utility Model Content

[0003] The utility model provides a box body and a battery core module having the same, so as to solve the problem in the prior art that a box cover and a box body are connected by potting and gluing solutions, resulting in a liquid cooling PACK and a battery core module having poor maintainability.

[0004] According to one aspect of the utility model, a box is provided, which is used to store battery cells. The box comprises: a shell having a accommodating cavity, a maintenance hole being arranged on the top of the shell, the maintenance hole being connected to the accommodating cavity, the accommodating cavity being used to store battery cells, and the maintenance hole being arranged corresponding to the battery cells; and an upper cover which is detachably arranged on the shell and can shield the maintenance hole.

[0005] Furthermore, a sealant is provided between the shell and the upper cover to seal the shell and the upper cover.

[0006] Furthermore, a limiting protrusion is arranged on the top of the shell, the bottom surface of the upper cover is in contact with the limiting protrusion, and a sealant is arranged between the shell and the upper cover.

[0007] Furthermore, a snap-fit ​​structure is provided between the shell and the upper cover, and the shell is detachably connected to the upper cover via the snap-fit ​​structure.

[0008] Furthermore, a through hole is provided on the top of the shell, a connecting rod is provided on the upper cover, and a protrusion is provided on the end of the connecting rod away from the upper cover. When the upper cover is fixed on the shell, the connecting rod is passed through the through hole, the protrusion abuts against the inner wall of the top of the shell, and the through hole and the connecting rod cooperate to form a snap-fit ​​structure.

[0009] Furthermore, the box body also includes two end covers, which are respectively arranged at two ends of the shell, and the end covers are fixedly connected to the shell.

[0010] Furthermore, a potting groove is provided between the end of the shell and the end cover, and potting glue is filled in the potting groove, and the shell is bonded to the end cover through the potting glue.

[0011] Furthermore, an airtight detection structure is provided on the shell and / or the upper cover.

[0012] Furthermore, the shell includes a top plate and two side plates, the two side plates are respectively arranged on both sides of the top plate, a plurality of maintenance holes are arranged on the top plate, and a plurality of snap-fit ​​structures are arranged between the top plate and the upper cover.

[0013] Furthermore, the maintenance hole is arranged corresponding to the welding point of the battery cell.

[0014] According to another aspect of the present invention, a battery cell module is provided. The battery cell module includes a battery cell, a liquid cooling plate and the box provided above. The battery cell is arranged in the box, and the box is fixed on the liquid cooling plate.

[0015] By applying the technical solution of the utility model, the battery cell is located in the accommodating cavity of the shell, and a maintenance hole is provided on the top of the shell, and the upper cover is detachably provided on the shell. With the above structure, during normal operation, the upper cover can block the maintenance hole to prevent foreign matter from entering the accommodating cavity, and can also prevent the staff from accidentally touching the battery cell and getting hurt; when the battery cell is damaged and needs to be repaired, the staff can remove the upper cover and repair the battery cell's pole piece or the communication line between the battery cells and other structures through the maintenance hole. Such a setting can make the liquid-cooled PACK and the battery cell module maintainable, facilitate the maintenance of the liquid-cooled PACK and the battery cell module, increase the service life of the liquid-cooled PACK and the battery cell module, and reduce unnecessary waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 An exploded view showing the matching of the housing and the upper cover provided by the utility model is shown;

[0018] Figure 2 Shows Figure 1 A partial enlarged view of the middle A;

[0019] Figure 3 A schematic diagram showing the structure of the shell and the end cover in cooperation;

[0020] Figure 4 The schematic diagram of the structure of the buckle structure provided by the utility model is shown;

[0021] Figure 5 A schematic diagram showing the structure of the housing and the upper cover provided by the utility model in cooperation with each other;

[0022] Figure 6The schematic diagram of the structure of the box provided by the utility model is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. Shell; 11. Accommodating cavity; 12. Maintenance hole; 13. Limiting protrusion; 14. Through hole; 15. Top plate; 16. Side plate; 17. Reinforcement rib; 18. Potting groove;

[0025] 20. Upper cover; 21. Connecting rod; 22. Raised portion; 23. Strengthening structure;

[0026] 30. Sealant;

[0027] 40. End cap;

[0028] 50. Airtight detection structure;

[0029] 60. Pre-tightening structure. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] like Figures 1 to 6 As shown, an embodiment of the utility model provides a box body, which is used to store battery cells. The box body includes a shell 10 and an upper cover 20. The shell 10 has a receiving cavity 11, and a maintenance hole 12 is provided on the top of the shell 10. The maintenance hole 12 is connected to the receiving cavity 11. The receiving cavity 11 is used to store battery cells, and the maintenance hole 12 is provided corresponding to the battery cells. The upper cover 20 is detachably provided on the shell 10, and the upper cover 20 can cover the maintenance hole 12.

[0032] By applying the technical solution of the present application, the battery cell is located in the accommodating cavity 11 of the shell 10, and a maintenance hole 12 is provided on the top of the shell 10, and the upper cover 20 is detachably provided on the shell 10. With the above structure, during normal operation, the upper cover 20 can shield the maintenance hole 12 to prevent foreign matter from entering the accommodating cavity 11, and can also prevent the staff from accidentally touching the battery cell and getting hurt; when the battery cell is damaged and needs to be repaired, the staff can remove the upper cover 20 and repair the battery cell's pole piece or the communication line between the battery cells and other structures through the maintenance hole 12. Such a configuration can make the liquid-cooled PACK and the battery cell module maintainable, facilitate the maintenance of the liquid-cooled PACK and the battery cell module, increase the service life of the liquid-cooled PACK and the battery cell module, and reduce unnecessary waste.

[0033] The maintenance hole 12 is set corresponding to the welding point of the battery cell. Specifically, the maintenance hole 12 is set corresponding to the welding points of the pole and FPC of the battery cell. Since the battery cell generally fails at the welding point, such a setting makes it easier for the staff to repair the faulty part, further improving the maintenance efficiency of the staff.

[0034] The upper cover 20 is provided with a reinforcing structure 23 , which can improve the structural strength of the upper cover 20 and avoid damage to the upper cover 20 during the process of disassembling the upper cover 20 , thereby increasing the service life of the upper cover 20 .

[0035] like Figure 4 As shown, a sealant 30 is provided between the housing 10 and the upper cover 20 to seal the housing 10 and the upper cover 20. Such a configuration can prevent external gas from entering the accommodating cavity 11 through the gap between the upper cover 20 and the housing 10, thereby ensuring the seal between the housing 10 and the upper cover 20. When the upper cover 20 needs to be removed, the sealant 30 can be scraped off with a utility knife.

[0036] Furthermore, a limiting protrusion 13 is provided on the top of the housing 10, the bottom surface of the upper cover 20 is in contact with the limiting protrusion 13, and the sealant 30 is provided between the housing 10 and the upper cover 20. In this way, the limiting protrusion 13 can support the upper cover 20, prevent the upper cover 20 from squeezing the sealant 30 and affecting the sealing effect of the sealant 30, and ensure that the sealant 30 has a sufficient thickness. At the same time, a disassembly space can be reserved for the staff, so that the staff can scrape off the sealant 30 when disassembling the upper cover 20, and avoid scratching the upper cover 20 and the housing 10 during the disassembly process.

[0037] Specifically, the top of the housing 10 is provided with a first bonding surface, which is annularly arranged on the outer periphery of the limiting protrusion 13, the bottom surface of the upper cover 20 is provided with a second bonding surface, which is annularly arranged along the edge of the upper cover 20, the first bonding surface and the second bonding surface are arranged correspondingly, and the sealant 30 is arranged between the first bonding surface and the second bonding surface. Such an arrangement facilitates the arrangement of the sealant 30 between the housing 10 and the upper cover 20.

[0038] The sealant 30 can also play a role in fixing the housing 10 and the upper cover 20 .

[0039] Furthermore, there is a buckle structure between the housing 10 and the upper cover 20, and the housing 10 is detachably connected to the upper cover 20 through the buckle structure. Such a configuration can facilitate the disassembly between the housing 10 and the upper cover 20, the structure is simple, and it is avoided to set a threaded hole or other structure between the housing 10 and the upper cover 20. Among them, buckles, limiting protrusions 13 and sealants 30 are sequentially arranged along the direction from the center of the upper cover 20 to the outside, and such a configuration facilitates fixing the upper cover 20 on the housing 10.

[0040] like Figure 2 As shown, a through hole 14 is provided on the top of the housing 10, a connecting rod 21 is provided on the upper cover 20, and a protrusion 22 is provided on the end of the connecting rod 21 away from the upper cover 20. When the upper cover 20 is fixed on the housing 10, the connecting rod 21 is inserted into the through hole 14, the protrusion 22 abuts against the inner wall of the top of the housing 10, and the through hole 14 cooperates with the connecting rod 21 to form a buckle structure. Such a configuration is simple in structure and easy to operate, and it is convenient to disassemble and assemble the upper cover 20.

[0041] Specifically, the structural dimensions of the through hole 14 are larger than those of the connecting rod 21. When the upper cover 20 is fixed to the shell 10, the connecting rod 21 will undergo elastic deformation. With this arrangement, the through hole 14 has sufficient space to accommodate the deformed connecting rod 21, thereby ensuring that the protrusion 22 can smoothly abut against the inner wall of the top of the shell 10.

[0042] Furthermore, a first inclined surface is provided at the bottom of the protrusion 22, and the first inclined surface gradually approaches the center line of the connecting rod 21 along the direction away from the upper cover 20. A second inclined surface is provided on the inner wall of the through hole 14, and the second inclined surface gradually moves away from the center line of the through hole 14 along the direction close to the upper cover 20. The first inclined surface and the second inclined surface are correspondingly arranged. In this way, the first inclined surface and the second inclined surface cooperate to form a guiding structure, thereby facilitating the connecting rod 21 to pass through the through hole 14.

[0043] like Figure 6 As shown, the box body also includes two end covers 40, which are respectively arranged at the two ends of the shell 10, and the end covers 40 are fixedly connected to the shell 10. Such arrangement facilitates the assembly between the box body, the end covers 40 and the battery cell, and is easy to operate.

[0044] like Figure 5 As shown, a potting groove 18 is provided between the end of the housing 10 and the end cover 40, and a potting glue is filled in the potting groove 18, and the housing 10 is bonded to the end cover 40 through the potting glue. Such a configuration is simple in structure and convenient in operation, and is convenient for fixing the housing 10 and the end cover 40, avoiding the processing of threaded holes and other structures. In addition, when the liquid-cooled PACK or the battery module is damaged due to high temperature, the potting glue is melted by heat, and the gas in the housing 10 can be discharged from the gap between the end cover 40 and the housing 10, thereby achieving pressure relief and explosion prevention.

[0045] Furthermore, the potting grooves 18 are arranged on the top and both sides of the shell 10 . Such arrangement can ensure the sealing area between the shell 10 and the end cover 40 , and ensure the stability of the connection between the shell 10 and the end cover 40 .

[0046] Among them, in the prior art, a sealing ring is usually provided between the box cover and the box body to achieve sealing. However, in the present application, a sealing ring is not required, the use of components is reduced, and assembly is more convenient.

[0047] The housing 10 or the upper cover 20 is provided with an airtight detection structure 50, or both the housing 10 and the upper cover 20 are provided with an airtight detection structure 50. In the present application, the housing 10 is provided with an airtight detection structure 50. The airtight detection structure 50 can detect the airtightness of the accommodating cavity 11 to prevent gas circulation, and the gas detection structure can also realize pressure relief. The airtight detection structure 50 can be a self-sealing valve or a pressure relief valve.

[0048] Specifically, the housing 10 includes a top plate 15 and two side plates 16, the two side plates 16 are respectively arranged on both sides of the top plate 15, a plurality of maintenance holes 12 are arranged on the top plate 15, and a plurality of snap-fit ​​structures are provided between the top plate 15 and the upper cover 20. Such an arrangement facilitates the maintenance of the battery cell and can ensure the stability of the connection between the top plate 15 and the upper cover 20. The position of the connecting rod 21 can be set according to the requirements, and optionally, the connecting rod 21 can be set around the upper cover 20 or in the central area of ​​the upper cover 20.

[0049] Furthermore, a plurality of reinforcing ribs 17 are provided on the top plate 15, and the spaces between adjacent reinforcing ribs 17 form maintenance holes 12. Such a configuration can avoid the welding points of the battery cell pole pieces, communication lines, and temperature sensing lines while meeting the reinforcement requirements, so as to facilitate the maintenance of the battery cell, and the through holes 14 are provided on the reinforcing ribs 17. In the present application, the plurality of maintenance holes 12 form a mesh structure.

[0050] The housing 10 can be used for a battery cell module, and can also be used for a whole PACK.

[0051] Furthermore, the box body also includes a pre-tightening structure 60, which can be a steel belt. In the present application, the housing 10 does not have a bottom plate. When assembling the battery cell module, the pre-tightening structure 60 is used to fix multiple battery cells and two end covers 40, and the two end covers 40 are respectively arranged on both sides of the multiple battery cells, and then the housing 10 is inserted between the pre-tightening structure 60 and the battery cells. Such a configuration facilitates the assembly of the battery cell module and is easy to operate.

[0052] The embodiment of the utility model provides a battery cell module, which includes a battery cell, a liquid cooling plate and the above-mentioned box body, wherein the battery cell is arranged in the box body, and the box body is fixed on the liquid cooling plate. Specifically, the box body is fixed to the liquid cooling plate by a fixing glue, and when the battery cell module needs to be moved, the liquid cooling plate can be moved. Among them, the box body can also be fixed on the heat sink tray, and the heat of the battery cell module is dissipated by the heat conductive structure. The battery cell module can be used as a PACK. The existing PACK structure size is larger than the battery cell module structure size of the present application, and the existing PACK uses a pressure relief valve for pressure relief. The model of the pressure relief valve used in the existing PACK is larger than the pressure relief valve used in the battery cell module of the present application, and the battery cell assembly of the present application can also use a self-sealing valve for airtightness detection. Therefore, the cost of the battery cell module of the present application is lower than that of the existing PACK. The battery cell module of the present application can be directly grouped into an energy storage system, or it can be grouped into an energy storage system after the battery cell module is composed of a PACK. Furthermore, the battery cell module using the box body provided above is convenient for repairing the battery cell module, thereby increasing the service life of the battery cell module and reducing unnecessary waste.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0058] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A box for storing battery cells, characterized in that: The box body comprises: A shell (10), the shell (10) having a receiving cavity (11), a maintenance hole (12) being arranged on the top of the shell (10), the maintenance hole (12) being connected to the receiving cavity (11), the receiving cavity (11) being used to store the battery cell, and the maintenance hole (12) being arranged corresponding to the battery cell; An upper cover (20) is detachably disposed on the housing (10), and the upper cover (20) is capable of covering the maintenance hole (12); A sealant (30) is provided between the shell (10) and the upper cover (20) to seal the shell (10) and the upper cover (20).

2. The box according to claim 1, characterized in that: A limiting protrusion (13) is arranged on the top of the shell (10), the bottom surface of the upper cover (20) is in contact with the limiting protrusion (13), and the sealant (30) is arranged between the shell (10) and the upper cover (20).

3. The box according to claim 1, characterized in that: A snap-fit ​​structure is provided between the shell (10) and the upper cover (20), and the shell (10) is detachably connected to the upper cover (20) via the snap-fit ​​structure.

4. The box according to claim 3, characterized in that: A through hole (14) is provided on the top of the shell (10), a connecting rod (21) is provided on the upper cover (20), and a protrusion (22) is provided on one end of the connecting rod (21) away from the upper cover (20). When the upper cover (20) is fixed on the shell (10), the connecting rod (21) is inserted into the through hole (14), the protrusion (22) abuts against the inner wall of the top of the shell (10), and the through hole (14) and the connecting rod (21) cooperate to form the snap-fit ​​structure.

5. The box according to claim 1, characterized in that: The box body further comprises two end covers (40), the two end covers (40) are respectively arranged at two ends of the shell (10), and the end covers (40) are fixedly connected to the shell (10).

6. The box according to claim 5, characterized in that: A potting groove (18) is provided between the end of the shell (10) and the end cover (40), and potting glue is potted in the potting groove (18), and the shell (10) is bonded to the end cover (40) through the potting glue.

7. The box according to claim 1, characterized in that: An airtightness detection structure (50) is provided on the housing (10) and / or the upper cover (20).

8. The box according to claim 3, characterized in that: The shell (10) comprises a top plate (15) and two side plates (16), wherein the two side plates (16) are respectively arranged on both sides of the top plate (15), a plurality of maintenance holes (12) are arranged on the top plate (15), and a plurality of snap-fit ​​structures are provided between the top plate (15) and the upper cover (20).

9. The box according to claim 1, characterized in that: The maintenance hole (12) is arranged corresponding to the welding point of the battery core.

10. A battery cell module, characterized in that: The battery cell module comprises a battery cell, a liquid cooling plate and a box body as described in any one of claims 1 to 9, the battery cell is arranged in the box body, and the box body is fixed on the liquid cooling plate.

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