Battery pack and electric device

Abstract

The utility model provides a battery pack and an electric device, and relates to the technical field of energy storage. In the battery pack, the two end plates are used for limiting the soft package battery cell unit between the two end plates, and meanwhile, the first elastic component and the second elastic component are matched, so that the stacked soft package battery cell units are fixed. As the two end plates are detachably connected with the bottom of the box body of the battery pack, when the battery packs with different capacities need to be produced, the two end plates can be detached from the existing bottom to be used for positioning the soft package battery cell units in the battery packs with different capacities. Even for different numbers of soft package battery cell units, the two end plates can be combined with the first elastic component and the second elastic component for installation such as series connection, and only the two end plates need to be disassembled, and the distance between the two end plates and / or the thickness of the first elastic component and / or the thickness of the second elastic component are / is changed.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery pack and an electrical device, which relate to the field of energy storage technology. Background Art

[0002] For household energy storage battery packs, stacked soft-pack batteries are often used to form the battery pack. However, the U-shaped sheet metal used in the existing technology can only meet the needs of manufacturing battery packs with a fixed capacity, which has limited production flexibility. Utility Model Content

[0003] In view of this, the present application provides a battery pack and an electrical device, the purpose of which is to solve the above technical problems to a certain extent.

[0004] According to a first aspect of the present application, a battery pack is provided, comprising:

[0005] a box body having a bottom;

[0006] two end plates, the two end plates being spaced apart and arranged on the bottom along a first direction, the end plates being detachably connected to the bottom;

[0007] a plurality of soft-pack battery core units, wherein the plurality of soft-pack battery core units are stacked between the two end plates along the first direction;

[0008] The battery pack includes a first elastic member and a second elastic member, wherein the first elastic member is arranged between the soft-pack battery cell unit closest to the end plate and the end plate, and the second elastic member is arranged between adjacent soft-pack battery cell units.

[0009] Preferably, the box body includes a plurality of fixing blocks arranged corresponding to each of the end plates, the fixing blocks protrude from the bottom toward the end plates, and the end plates are detachably connected to the corresponding plurality of fixing blocks.

[0010] Preferably, the battery pack further comprises a first strap, which is wound around the outer sides of the two end plates and the plurality of soft-pack battery cell units;

[0011] The fixing block has a first groove which is recessed from a side of the fixing block facing the bottom toward a direction away from the bottom, and the first strap is passed through the first groove.

[0012] Preferably, the battery pack further includes a second strap, which is wound around the two end plates and the outer sides of the plurality of soft-pack battery cell units, and the second strap crosses the first strap.

[0013] Preferably, the battery pack further comprises an insulating seat, the end plate having a second groove for arranging the insulating seat, the second groove being located on a side of the end plate away from the bottom, and at least a portion of the insulating seat being arranged in the second groove;

[0014] Wherein, the insulating seats respectively located on the two end plates are opposite to each other in the first direction;

[0015] The insulating seat is an insulating structure. The battery pack also includes a bracket and a printed circuit board. The bracket is detachably connected between two insulating seats opposite to each other. The printed circuit board is supported on a side of the bracket away from the bottom. The printed circuit board is detachably connected to the insulating seat.

[0016] Preferably, the end plate also has two third grooves arranged in the second groove, the two third grooves are arranged opposite to each other in the second direction, and the insulating seat has two protrusions respectively used to be inserted into the two third grooves, and the second direction is perpendicular to the first direction.

[0017] Preferably, the insulating seat further has a fourth groove, the fourth groove is located between the two protrusions, the fourth groove is used to accommodate a part of the printed circuit board, and is used to be detachably connected to the printed circuit board.

[0018] Preferably, the battery pack further comprises an insulating sheet, which is an insulating structure and is arranged between the bottom and the plurality of soft-pack battery cell units;

[0019] The box body further includes a top and an insulating cover plate. The insulating cover plate is an insulating structure. The insulating cover plate is arranged between the top and the plurality of soft-pack battery cell units. The insulating cover plate is detachably connected to the end plate.

[0020] Preferably, the soft-pack battery cell unit includes multiple columns of soft-pack battery cell units arranged side by side in a second direction perpendicular to the first direction, and the battery pack has an insulating plate, which is arranged between adjacent columns of soft-pack battery cell units, and the insulating plate is an insulating structure.

[0021] According to a second aspect of an embodiment of the present application, an electric device is provided, comprising the battery pack as described above.

[0022] Thus, according to the battery pack provided by the present application, in the battery pack, two end plates are used to limit the soft-pack battery cell units located between the two end plates, and at the same time, the first elastic member and the second elastic member are used to fix the stacked soft-pack battery cell units on the one hand, and on the other hand, the soft-pack battery cell units are protected and installed by the first elastic member and the second elastic member, thereby forming a battery pack.

[0023] According to the battery pack provided by the present application, since the two end plates are detachably connected to the bottom of the battery pack case, when it is necessary to produce battery packs of different capacities, the two end plates can be removed from the existing bottom to be used for positioning the soft-pack battery cells in battery packs of different capacities. Even different numbers of soft-pack battery cells can be installed, such as in a series connection, by combining the two end plates with the first elastic member and the second elastic member, simply by removing the two end plates and changing the distance between the two end plates and / or the thickness of the first elastic member and / or the thickness of the second elastic member.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram showing a partial structure of a battery pack provided according to an embodiment of the present application;

[0027] Figure 2 A schematic three-dimensional diagram of a fixing block of a battery pack according to an embodiment of the present application is shown;

[0028] Figure 3 A schematic diagram showing an exploded view of a soft-pack cell unit of a battery pack provided according to an embodiment of the present application;

[0029] Figure 4 A schematic diagram showing another portion of the structure of a battery pack provided according to an embodiment of the present application;

[0030] Figure 5 A schematic diagram showing the front side of an end plate of a battery pack provided according to an embodiment of the present application is shown;

[0031] Figure 6 A schematic diagram showing the back side of an end plate of a battery pack provided according to an embodiment of the present application is shown;

[0032] Figure 7 A schematic diagram showing an exploded view of a portion of the structure of a battery pack provided according to an embodiment of the present application;

[0033] Figure 8A schematic diagram showing a three-dimensional image of an insulating seat of a battery pack provided according to an embodiment of the present application is shown;

[0034] Figure 9 A schematic diagram showing a three-dimensional view of a cover of a battery pack provided according to an embodiment of the present application is shown;

[0035] Figure 10 A schematic diagram showing another three-dimensional view of a cover of a battery pack provided according to an embodiment of the present application is shown;

[0036] Figure 11 A schematic diagram showing another exploded view of a battery pack provided according to an embodiment of the present application is shown.

[0037] Reference numerals:

[0038] 1-insulating sheet, 2-conveying groove, 3-end plate, 4-fixing block, 41-threaded hole, 42-first groove; 5-long screw, 6-soft-pack battery cell, 7-second elastic member, 8-L-shaped heat dissipation aluminum sheet, 9-battery cell bottom foam, 10-insulating plate, 12-second strap, 13-first elastic member.

[0039] 14-first strap, 15-series copper busbar, 16-insulating cover, 17-printed circuit board, 18-bracket, 19-fixing plate, 20-another BMU, 21-insulating seat; 221-high-voltage interface mounting hole, 211-fourth groove, 212-protrusion, 213-mounting hole, 22-cover, 222-communication interface mounting hole, 223-first upper cover mounting strip, 224-BMU fixing column, 225-BCU fixing column, 226-second upper cover mounting strip, 23-insulating upper cover, 24-BMU, 25-high-voltage interface, 26-total positive and negative copper busbars, 27-communication interface, 31-first longitudinal groove, 32-second longitudinal groove, 33-third longitudinal groove, 34-fixing hole, 35-transverse groove, 36-connecting hole, 37-second groove. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solution of this application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0041] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0044] According to the first aspect of the embodiment of the present application, a battery pack is provided. Figures 1 to 11 Describe the structure and working principle of the battery pack in detail.

[0045] According to an embodiment of the present application, the battery pack includes a housing, two end plates 3, and a plurality of soft-pack battery cells. In this embodiment, the housing has a bottom. The two end plates 3 are spaced apart at the bottom along a first direction, and the end plates 3 are detachably connected to the bottom. The plurality of soft-pack battery cells are stacked between the two end plates 3 along the first direction.

[0046] In the embodiment, the battery pack includes a first elastic member 13 and a second elastic member 7 . The first elastic member 13 is disposed between the soft-pack battery cell unit closest to the end plate 3 and the end plate 3 , and the second elastic member 7 is disposed between adjacent soft-pack battery cell units.

[0047] In this way, according to the battery pack provided in the embodiment of the present application, in the battery pack, two end plates 3 are used to limit the soft-pack battery cell units located between the two end plates 3, and at the same time, the first elastic member 13 and the second elastic member 7 are used to, on the one hand, fix the stacked soft-pack battery cell units, and on the other hand, protect and install the soft-pack battery cell units through the first elastic member 13 and the second elastic member 7, thereby forming a battery pack.

[0048] According to the battery pack provided in the embodiment of the present application, since the two end plates 3 are detachably connected to the bottom of the battery pack case, when it is necessary to produce battery packs of different capacities, the two end plates 3 can be removed from the existing bottom to be used for positioning the soft-pack battery cells in battery packs of different capacities. In other words, even different numbers of soft-pack battery cells can be installed, such as in a series connection, by combining the two end plates 3 with the first elastic member 13 and the second elastic member 7, simply by removing the two end plates 3 and changing the distance between the two end plates 3 and / or the thickness of the first elastic member 13 and / or the thickness of the second elastic member 7.

[0049] The battery pack provided in the embodiments of the present application provides a novel battery pack for soft-pack battery cells, compared to the prior art. The battery pack provided in the embodiments of the present application effectively solves the problem of securing the soft-pack battery cells when stacked. Unlike the prior art, which uses fixed U-shaped sheet metal parts to secure the battery pack, the battery pack provided in the embodiments of the present application can also adjust the space between the end plates 3 by removing them, providing greater flexibility than the prior art.

[0050] Furthermore, since the battery pack provided in the embodiment of the present application no longer uses a U-shaped sheet metal to accommodate the batteries, the battery pack can be assembled without the use of tooling corresponding to the U-shaped sheet metal during the battery pack production process. Therefore, the battery pack provided in the embodiment of the present application facilitates tooling-free installation and transportation of the battery pack. Furthermore, in the embodiment, both the first elastic member 13 and the second elastic member 7 can be foam.

[0051] In an embodiment, as an example, the soft-pack battery cell unit may include a soft-pack battery cell 6, such as a soft-pack lithium battery cell. In an embodiment, the soft-pack battery cell unit may further include a battery cell bottom foam 9, which may be double-sided with adhesive. The soft-pack battery cell unit may further include an L-shaped heat dissipation aluminum sheet 8 on this basis. The L-shaped heat dissipation aluminum sheet 8 may be fixed by the adhesive surface of the battery cell bottom foam 9, thereby being equivalent to being adhered to the outside of the soft-pack battery cell 6, and together with the soft-pack battery cell 6 and the battery cell bottom foam 9, forming a soft-pack battery cell unit.

[0052] In an embodiment, as an example, the battery pack case may include, for example, a cover shell 22 and a lower case connected to each other in a vertical direction, wherein the bottom portion is the bottom side of the lower case, i.e., the bottom portion is part of the lower case. In an embodiment, both the top and bottom of the cover shell 22 are open. The battery pack may further include an insulating upper cover 23. The insulating upper cover 23 may be connected to the cover shell 22 by a connector, such as a screw, that passes through the upper cover and is screwed thereon, thereby sealing the upper opening of the cover shell 22.

[0053] In an embodiment, the cover 22 may be provided with, for example, a high-voltage interface mounting hole 221, a communication interface mounting hole 222 for mounting the communication interface 27, a first upper cover mounting strip 223 (disposed along the length of the upper opening and extending into the upper opening), a BMU (Battery Management Unit) fixing post 224, a BCU (Battery Battery Control Unit) fixing post 225, and a second upper cover mounting strip 226 (disposed on the wide side of the upper opening and extending into the upper opening). In an embodiment, both the first upper cover mounting strip 223 and the second upper cover mounting strip 226 may have holes for screws to pass through.

[0054] According to the battery pack provided in the embodiment of the present application, the housing includes multiple fixing blocks 4 corresponding to each end plate 3. The fixing blocks 4 protrude from the bottom toward the end plates 3, and the end plates 3 are detachably connected to the corresponding fixing blocks 4. In the embodiment, the arrangement of the fixing blocks 4 provides a more convenient installation position for the end plates 3, thereby facilitating faster installation of the end plates 3 to the bottom of the battery pack.

[0055] In an embodiment, the fixing block 4 can be, for example, a rectangular block structure. The fixing block 4 can also be, for example, detachably mounted to the bottom of the box, such as also being screwed to the bottom of the box, i.e., the bottom of the fixing block 4 has a threaded hole 41. In an embodiment, the end plate 3 can be provided with through holes located on both sides of the end plate 3 in the second direction (the first direction can be perpendicular to the second direction, and both are substantially horizontal directions). The through holes penetrate the end plate 3 in the vertical direction, and the screws that penetrate the end plate 3 and mount it to the fixing block 4 can be long screws 5 that are taller than the end plate 3.

[0056] As an example, in the embodiment, each end plate 3 may be correspondingly provided with two fixing blocks 4 . In other words, each end plate 3 is connected above the two fixing blocks 4 .

[0057] According to the battery pack provided in the embodiment of the present application, the battery pack may further include a first strap 14, which may be wound around the outside of the two end plates 3 and the multiple soft-pack battery cell units. In an embodiment, the fixed block 4 has a first groove 42 that is recessed from the side of the fixed block 4 facing the bottom in a direction away from the bottom, and the first strap 14 is passed through the first groove 42. In an embodiment, a first groove 42 may be provided at the bottom of the fixed block 4, and the first groove 42 may be passed through by the first strap 14. In an embodiment, the first strap 14 is wound around the outside of the two end plates 3 and the soft-pack battery cell units. Specifically, the first strap 14 passes through the bottom and top of the multiple soft-pack battery cell units mentioned above during the winding process, that is, the first strap 14 is vertically wound around the outside of the end plates 3 and the soft-pack battery cell units.

[0058] In an embodiment, as an example, the first strap 14 may be a plastic-steel strap, where the winding of the first strap 14 can restrain the expansion of the plurality of soft-pack battery cells.

[0059] According to the battery pack provided in the embodiment of the present application, the battery pack may further include a second tie 12. The second tie 12 may be wound around the two end plates 3 and the outer sides of the plurality of soft-pack battery cells, and the second tie 12 may intersect with the first tie. As an example, the second tie 12 may be wound horizontally around the outer sides of the plurality of soft-pack battery cells, i.e., perpendicular to the first tie, thereby also constraining the expansion of the plurality of soft-pack battery cells.

[0060] According to the battery pack provided in the embodiment of the present application, the battery pack may further include an insulating seat 21, and the end plate 3 may have a second groove 37 for arranging the insulating seat 21. The second groove 37 may be located on the side of the end plate 3 away from the bottom, and at least a portion of the insulating seat 21 may be arranged in the second groove 37.

[0061] In the embodiment, as an example, the end plate 3 can be formed of a metal material such as aluminum. Accordingly, the insulating seat 21 provided in the battery pack according to the embodiment of the application insulates the printed circuit board from the end plate 3, preventing the printed circuit board and even the battery box from being charged.

[0062] In the embodiment, the second groove 37 provides an installation space for the insulating seat 21 . For example, the insulating seat 21 can be completely located in the second groove 37 , thereby making the overall structure formed by the end plate 3 and the insulating seat 21 more compact.

[0063] In an embodiment, the insulating seats 21, respectively located on the two end plates 3, are opposed to each other in a first direction. The insulating seats 21 are insulating structures (e.g., plastic structures). The battery pack may further include a bracket 18 and a printed circuit board. The bracket 18 may be detachably connected between the two opposing insulating seats 21. The printed circuit board may be supported on a side of the bracket 18 away from the bottom. The printed circuit board 17 may be detachably connected to the insulating seats 21. In an embodiment, the insulating seats 21 may have mounting holes 213 disposed at the bottom of the second groove 37 for screws to pass through for connection to the printed circuit board 17.

[0064] In an embodiment, according to the battery pack provided in an embodiment of the present application, the end plate 3 may further have two third grooves disposed within the second groove 37. The two third grooves may be disposed opposite each other in the second direction, and the insulating seat 21 may have two protrusions 212 for respectively inserting into the two third grooves. In an embodiment, the second groove 37 may be open upward, so that the insulating seat 21 with the two protrusions 212 can be inserted into the second groove 37 from top to bottom, so that the two protrusions 212 are respectively inserted into the corresponding third grooves, providing an installation method similar to a mortise and tenon structure.

[0065] According to the battery pack provided in an embodiment of the present application, the insulating seat 21 may further have a fourth groove 211, which may be located between the two protrusions 212. The fourth groove 211 may be used to accommodate a portion of a printed circuit board and to be detachably connected to the printed circuit board. In an embodiment, the end of the printed circuit board in the first direction may be provided with a strip structure, which may be inserted into the fourth groove 211. As an example, the number of fourth grooves 211 may be two, and the corresponding strip structures may also be two.

[0066] According to the battery pack provided in the embodiment of the present application, the battery pack further includes an insulating sheet 1, which is an insulating structure and is disposed between the bottom and the plurality of soft-pack battery cells. The housing further includes a top and an insulating cover 16, which is an insulating structure and can be disposed between the top and the plurality of soft-pack battery cells. The insulating cover 16 can be detachably connected to the end plate 3 (e.g., by screws, with the end plate 3 having connection holes 36 for screwing the screws).

[0067] According to the battery pack provided in the embodiments of the present application, the soft-pack cell units include multiple columns of soft-pack cell units arranged side by side in the second direction. The battery pack has an insulating plate 10 disposed between adjacent columns of soft-pack cell units. The insulating plate 10 is an insulating structure. In the embodiments, two insulating seats 21 and a printed circuit board can be provided for each column of soft-pack cell units.

[0068] In the embodiment, as an example, two rows of soft-pack battery cells can be provided, and adjacent printed circuit boards can be connected in series using a series copper bus 15. In addition, in the embodiment, a transport slot 2 can be provided below the bottom of the box for transporting the box. In addition, the box can also be provided with a BMU 24, a high-voltage interface 25, a total positive and negative copper bus 26, and a communication interface 27. The outer side of the end plate 3 can also be provided with a first longitudinal groove 31, a second longitudinal groove 32, and a third longitudinal groove 33 for limiting the position of the first strap, as well as a transverse groove 35 for limiting the position of the second strap 12. A fixing hole 34 for connecting the end plate 3 to an external structure can also be provided. In addition, another BMU 20 can be provided on the box, and the other BMU 20 can be mounted to the box through a fixing plate 19.

[0069] According to a second aspect of an embodiment of the present application, an electrical device is provided. The electrical device includes the above battery pack and the above beneficial effects, which will not be described in detail here.

[0070] The above are only preferred embodiments of the present application and do not limit the scope of protection of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings under the innovative concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. A battery pack, characterized in that: The battery pack includes: a box body having a bottom; two end plates, the two end plates being spaced apart and arranged on the bottom along a first direction, the end plates being detachably connected to the bottom; a plurality of soft-pack battery core units, wherein the plurality of soft-pack battery core units are stacked between the two end plates along the first direction; The battery pack includes a first elastic member and a second elastic member, wherein the first elastic member is arranged between the soft-pack battery cell unit closest to the end plate and the end plate, and the second elastic member is arranged between adjacent soft-pack battery cell units.

2. The battery pack according to claim 1, wherein: The box body includes a plurality of fixing blocks arranged corresponding to each of the end plates, the fixing blocks protrude from the bottom toward the end plates, and the end plates are detachably connected to the corresponding plurality of fixing blocks.

3. The battery pack according to claim 2, wherein: The battery pack further includes a first strap, which is wound around the two end plates and the outer sides of the plurality of soft-pack battery cells; The fixing block has a first groove which is recessed from a side of the fixing block facing the bottom toward a direction away from the bottom, and the first strap is passed through the first groove.

4. The battery pack according to claim 3, wherein: The battery pack further includes a second strap, which is wound around the two end plates and the outer sides of the plurality of soft-pack battery cell units, and the second strap crosses the first strap.

5. The battery pack according to claim 1, wherein: The battery pack further includes an insulating seat, the end plate having a second groove for arranging the insulating seat, the second groove being located on a side of the end plate away from the bottom, and at least a portion of the insulating seat being arranged in the second groove; Wherein, the insulating seats respectively located on the two end plates are opposite to each other in the first direction; The insulating seat is an insulating structure. The battery pack also includes a bracket and a printed circuit board. The bracket is detachably connected between two insulating seats opposite to each other. The printed circuit board is supported on a side of the bracket away from the bottom. The printed circuit board is detachably connected to the insulating seat.

6. The battery pack according to claim 5, characterized in that: The end plate also has two third grooves arranged in the second groove, the two third grooves are arranged opposite to each other in the second direction, and the insulating seat has two protrusions respectively for inserting into the two third grooves, and the second direction is perpendicular to the first direction.

7. The battery pack according to claim 6, characterized in that: The insulating seat further has a fourth groove, which is located between the two protrusions. The fourth groove is used to accommodate a portion of the printed circuit board and is used to be detachably connected to the printed circuit board.

8. The battery pack according to claim 1, wherein: The battery pack further includes an insulating sheet, which is an insulating structure and is arranged between the bottom and the plurality of soft-pack battery cell units; The box body further includes a top and an insulating cover plate. The insulating cover plate is an insulating structure. The insulating cover plate is arranged between the top and the plurality of soft-pack battery cell units. The insulating cover plate is detachably connected to the end plate.

9. The battery pack according to claim 1, wherein: The soft-pack battery cell unit includes multiple columns of soft-pack battery cell units arranged side by side in a second direction perpendicular to the first direction. The battery pack has an insulating plate, which is arranged between adjacent columns of soft-pack battery cell units and is an insulating structure.

10. An electrical device, characterized in that: The electrical device comprises the battery pack according to any one of claims 1 to 9.

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