Battery pack and power device

Abstract

The utility model discloses a battery pack and a power plant, the battery pack comprises: a housing, in which an accommodating cavity is formed; the number of the battery modules is multiple, and the multiple battery modules are arranged in the containing cavity in an array mode; the supporting plates are arranged between every two adjacent battery modules in the width direction, and the supporting plates extend in the length direction of the battery pack. According to the battery pack disclosed by the utility model, longitudinal beams are omitted by arranging the supporting plates, so that the number of parts of the battery pack is reduced, the assembly difficulty is reduced, the weight of the battery pack is reduced, the space utilization rate is improved, the production cost is reduced, the production efficiency is improved, and the performance of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power device manufacturing, in particular to a battery pack and a power device. Background Art

[0002] The relevant technology points out that the current power battery packs basically rely on blade cells to form a circuit through copper bars and wiring harnesses to provide power for the entire pack. The common cells now have side-out poles. This solution requires a certain amount of space to be reserved between the cell and the shell, as well as between the cells to accommodate the wiring harness. The conventional reserved gap is between 20-60mm. The wiring harness occupies a large space in the pack and the cell poles have poor anti-extrusion ability, resulting in high safety risks such as side collision and leakage. In addition, the battery pack requires structures such as crossbeams, longitudinal beams, cold plates, and bottom guard plates, which leads to low space utilization and high costs. The current new energy industry has higher and higher requirements for battery power under the same volume, and the traditional layout scheme can no longer meet the requirements of high energy density. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery pack with high space utilization and low production cost.

[0004] The utility model also provides a power device having the battery pack.

[0005] According to the first aspect of the utility model, the battery pack comprises: a shell having a accommodating cavity formed therein; a battery module, the battery module comprising a plurality of battery modules, and the plurality of battery module arrays are arranged in the accommodating cavity; and a support plate, the support plate is arranged between every two adjacent battery modules in the width direction, and the support plate extends along the length direction of the battery pack.

[0006] According to the battery pack of the utility model, the longitudinal beam is eliminated by providing a support plate, thereby reducing the number of parts of the battery pack, reducing the difficulty of assembly, reducing the weight of the battery pack, improving space utilization, reducing production costs, improving production efficiency, and improving the performance of the battery pack. In addition, the battery module also acts as a longitudinal beam, and the whole pack has a high modality and good rigidity.

[0007] In some embodiments, the housing includes a frame, the battery module is bonded to the frame by a structural adhesive, and / or the battery module is bonded to the support plate by a structural adhesive.

[0008] In some embodiments, the housing further includes a cold plate, which is disposed at the bottom of the battery module and is bonded to the battery module via a thermally conductive adhesive.

[0009] In some embodiments, the housing further includes a cover plate, which is disposed above the battery module, and a first groove and a second groove which are recessed upward are formed on the cover plate, and the first groove and the second groove both extend along the length direction of the battery pack.

[0010] In some embodiments, the first groove and the second groove define a first channel and a second channel with the battery module, and the top of the battery module has an explosion-proof valve and a pole, the explosion-proof valve is located in the first channel, and the pole is located in the second channel.

[0011] In some embodiments, a crossbeam extending along the width direction of the battery pack is provided in the frame, and the crossbeam is at least located between every two adjacent battery modules in the length direction.

[0012] In some embodiments, the thickness of the structural adhesive between the battery module and the frame is in the range of 2-10 mm, and / or the thickness of the structural adhesive between the battery module and the support plate is in the range of 1-5 mm.

[0013] In some embodiments, the thickness of the thermally conductive adhesive is in the range of 0.5-3 mm.

[0014] In some embodiments, the thickness of the support plate is in the range of 1-3 mm; the support plate is formed as a mica plate or an epoxy plate.

[0015] The power device according to the second aspect of the utility model comprises the battery pack according to the first aspect of the utility model.

[0016] According to the power device of the utility model, by providing the battery pack of the first aspect, the overall performance of the power device is improved, the safety performance of the power device is enhanced, and the production cost is reduced.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 The assembly diagram of the battery pack shown in FIG.

[0020] Figure 3 yes Figure 1 The overall schematic diagram of the battery pack shown in;

[0021] Figure 4 yes Figure 3 A schematic diagram of an AA cross section of a battery pack shown in ;

[0022] Figure 5 yes Figure 4 A schematic side view of a battery pack shown in ;

[0023] Figure 6 yes Figure 4 A schematic side view of the battery pack from another angle shown in FIG.

[0024] Reference numerals:

[0025] 100. Battery pack; 1. Shell; 11. Frame; 111. Crossbeam; 12. Cold plate; 13. Cover plate; 131. First groove; 132. Second groove; 2. Battery module; 21. Explosion-proof valve; 22. Post; 3. Support plate; 4. Structural adhesive; 5. Thermal conductive adhesive; 6. Protective parts. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] Reference below Figure 1-Figure 6 A battery pack 100 according to an embodiment of the first aspect of the present invention is described.

[0028] like Figure 1 As shown, the battery pack 100 according to the first embodiment of the utility model includes: a shell 1, a battery module 2 and a support plate 3.

[0029] Specifically, a receiving cavity is formed in the housing 1, and the battery module 2 includes a plurality of battery modules 2, which are arranged in an array in the receiving cavity, and the support plate 3 is arranged between every two adjacent battery modules 2 in the width direction, and the support plate 3 extends along the length direction of the battery pack 100. Therefore, the battery pack 100 has a simple structure and an ingenious design.

[0030] According to the battery pack 100 of the embodiment of the utility model, the longitudinal beam is eliminated by providing the support plate 3, thereby reducing the number of components of the battery pack 100, reducing the difficulty of assembly, reducing the weight of the battery pack 100, improving the space utilization, reducing the production cost, improving the production efficiency, and improving the performance of the battery pack 100. In addition, the battery module 2 also acts as a longitudinal beam, and the whole pack has a high modality and good rigidity.

[0031] In some embodiments of the present invention, Figure 1As shown, the housing 1 includes a frame 11, and the battery module 2 and the frame 11 are bonded together by means of a structural adhesive 4, and / or the battery module 2 and the support plate 3 are bonded together by means of a structural adhesive 4. In other words, the battery module 2 and the frame 11 may be bonded together by means of the structural adhesive 4, or the battery module 2 and the support plate 3 may be bonded together by means of the structural adhesive 4, or the battery module 2 and the frame 11 and the support plate 3 may be bonded together by means of the structural adhesive 4. Thus, the structural adhesive 4 not only realizes the bonding function between the battery module 2 and the components, but also can absorb the tolerances generated during the assembly process of the battery pack 100, and can also absorb vibrations, thereby improving the sealing effect between the battery module 2 and the frame 11 and the support plate 3.

[0032] Preferably, the bonding strength of the structural adhesive 4 is greater than 3 Mpa.

[0033] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, the housing 1 further includes a cold plate 12, which is disposed at the bottom of the battery module 2 and is bonded to the battery module 2 via a thermally conductive adhesive 5. It is understandable that the cold plate 12 serves as a cooling component as well as a bottom plate, thereby realizing component integration of the battery pack 100, reducing the number of components of the battery pack 100, improving space utilization, and reducing production costs. In addition, the thermally conductive adhesive 5 absorbs Z-direction tolerances, thereby improving assembly accuracy of the battery pack 100.

[0034] Furthermore, if Figure 1 and Figure 5 As shown, the battery pack 100 further includes: a protective member 6, which is disposed on a surface of the cold plate 12 facing away from the battery module 2. Thus, while achieving heat conduction, the multiple functions of protecting the cold plate 12 and keeping warm are achieved.

[0035] In some embodiments of the present invention, Figure 1 As shown, the housing 1 also includes a cover plate 13, which is arranged above the battery module 2. The cover plate 13 is formed with a first groove 131 and a second groove 132 which are concave upwards, and the first groove 131 and the second groove 132 both extend along the length direction of the battery pack 100. Therefore, the first groove 131 and the second groove 132 are provided for wiring and exhaust, and the explosion-proof valve 21 and the pole 22 are provided at the top of the battery module 2, which reduces the distance between the battery modules 2 and does not occupy the X-direction and Y-direction space in the battery pack 100. The energy capacity of the battery pack 100 is increased while the spatial volume of the battery pack 100 remains unchanged, thereby increasing the energy density of the battery pack 100. The first groove 131 and the second groove 132 also increase the structural strength of the battery pack 100, improve the compression resistance of the whole pack, and reduce the failure risk of deformation and leakage of the battery cell during extrusion and collision.

[0036] In some embodiments of the utility model, the first groove 131 and the second groove 132 define a first channel and a second channel with the battery module 2. The top of the battery module 2 has an explosion-proof valve 21 and a pole 22. The explosion-proof valve 21 is located in the first channel, and the pole 22 is located in the second channel. Therefore, when the explosion-proof valve 21 releases gas, the gas flows in the first channel and is discharged from the battery pack 100. The gas will no longer flow anywhere in the battery pack 100, ensuring that the pressure inside the battery pack 100 is always maintained within a safe value, thereby improving the safety factor of the battery pack 100. The second channel is used for wiring, and the first channel and the second channel are not connected, thereby improving the safety of the battery pack 100, optimizing the space utilization inside the battery pack 100, and ensuring the stable operation and long-term reliability of the battery pack 100 under complex working conditions.

[0037] In some embodiments of the present invention, a crossbeam 111 extending along the width direction of the battery pack 100 is provided in the frame 11, and the crossbeam 111 is at least located between every two adjacent battery modules 2 in the length direction. Thus, the provision of the crossbeam 111 realizes a modular design inside the battery pack 100, facilitates assembly and maintenance, improves assembly efficiency, and reduces maintenance costs.

[0038] In some embodiments of the present invention, the thickness of the structural adhesive 4 between the battery module 2 and the frame 11 is in the range of 2-10 mm, and / or the thickness of the structural adhesive 4 between the battery module 2 and the support plate 3 is in the range of 1-5 mm. For example, the thickness of the structural adhesive 4 between the battery module 2 and the frame 11 can be: 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, etc.; the thickness of the structural adhesive 4 between the battery module 2 and the support plate 3 can be: 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc.

[0039] Preferably, a structural adhesive 4 is provided between the cover plate 13 and the battery module 2 , and the cover plate 13 and the battery module 2 are bonded and connected by the structural adhesive 4 .

[0040] In some embodiments of the present invention, the thickness of the thermal conductive adhesive 5 is in the range of 0.5-3 mm. For example, the thickness of the thermal conductive adhesive 5 can be: 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.

[0041] In some embodiments of the present invention, since a thin plate is prone to breakage, and a thick plate cannot significantly improve the thermal insulation effect and increases production costs, the thickness of the support plate 3 is within the range of 1-3 mm. For example, the thickness of the support plate 3 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, and so on.

[0042] Preferably, the support plate 3 is formed as a mica plate or an epoxy plate.

[0043] The power device according to the embodiment of the second aspect of the utility model includes the battery pack 100 according to the first aspect of the utility model.

[0044] According to the power device of the embodiment of the utility model, by providing the battery pack 100 of the first embodiment, the overall performance of the power device is improved, the safety performance of the power device is enhanced, and the production cost is reduced.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A housing having a receiving cavity formed therein; A battery module, wherein the battery module comprises a plurality of battery modules, and the plurality of battery modules are arrayed in the accommodating cavity; A support plate is disposed between every two adjacent battery modules in the width direction, and the support plate extends along the length direction of the battery pack.

2. The battery pack according to claim 1, characterized in that: The housing includes a frame, the battery module is bonded to the frame by means of a structural adhesive, and / or the battery module is bonded to the support plate by means of a structural adhesive.

3. The battery pack according to claim 2, characterized in that: The housing further comprises a cold plate, which is arranged at the bottom of the battery module and is bonded to the battery module by a heat-conducting adhesive.

4. The battery pack according to claim 3, characterized in that: The housing further comprises a cover plate, which is disposed above the battery module. A first groove and a second groove which are recessed upward are formed on the cover plate, and the first groove and the second groove both extend along the length direction of the battery pack.

5. The battery pack according to claim 4, characterized in that: The first groove and the second groove define a first channel and a second channel with the battery module. The top of the battery module is provided with an explosion-proof valve and a pole. The explosion-proof valve is located in the first channel, and the pole is located in the second channel.

6. The battery pack according to claim 2, characterized in that: A crossbeam extending along the width direction of the battery pack is provided in the frame, and the crossbeam is at least located between every two adjacent battery modules in the length direction.

7. The battery pack according to claim 2, characterized in that: The thickness of the structural adhesive between the battery module and the frame is in the range of 2-10 mm, and / or the thickness of the structural adhesive between the battery module and the support plate is in the range of 1-5 mm.

8. The battery pack according to claim 3, characterized in that: The thickness of the thermal conductive adhesive is in the range of 0.5-3 mm.

9. The battery pack according to any one of claims 1 to 8, characterized in that: The thickness of the support plate is in the range of 1-3 mm; the support plate is formed as a mica plate or an epoxy plate.

10. A power device, characterized in that: A battery pack comprising any one of claims 1-9.

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