Battery pack and electric device

Abstract

The utility model discloses a battery pack and an electric device. The battery pack comprises a shell, a first separator, a second separator, a battery cell assembly and potting resin. The shell is provided with a containing space, the first partition piece and the second partition piece are located in the containing space, and the second partition piece and the first partition piece are arranged in a spaced mode. The first separator is provided with a plurality of first openings, and the second separator is provided with a plurality of second openings. The battery cell assembly comprises a plurality of battery cells, one battery cell penetrates through one first opening and one second opening, and each battery cell is located between the first separator and the second separator. The potting resin is at least partially arranged between the first separator and the second separator, and the shell, the battery core assembly, the first separator and the second separator are bonded and fixed through the potting resin. Through the mode, the first separator, the second separator and the shell can define the local glue filling space, so that compared with the mode that the accommodating space is completely filled and packaged, the use amount of the filling resin is reduced, and the energy density of the battery pack is improved.

Description

Technical Field

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

[0002] Battery packs are widely used as power sources in electrical devices. In related technologies, potting resin is often added between the cells within a battery pack to improve its protective properties. However, using too much potting resin can increase the weight of the battery pack and reduce its energy density. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a battery pack and an electrical device, aiming to reduce the amount of potting resin used and improve the energy density of the battery pack.

[0004] According to a first aspect of the present application, a battery pack is provided, comprising a housing, a first separator, a second separator, a cell assembly, and a potting resin. The housing is provided with a storage space, the first separator and the second separator are located in the storage space, and the second separator and the first separator are spaced apart. The first separator is provided with a plurality of first openings, and the second separator is provided with a plurality of second openings. The cell assembly includes a plurality of cells, one cell passing through a first opening and a second opening, and each cell being located between the first separator and the second separator. The potting resin is at least partially located between the first separator and the second separator, and the housing, the cell assembly, the first separator, and the second separator are bonded and fixed by the potting resin.

[0005] In the battery pack described above, the first and second separators and the housing can enclose a localized potting space. The volume of this localized potting area can be adjusted by adjusting the relative positions of the first and second separators. Compared to completely filling the containment space, this reduces the amount of potting resin used and improves the energy density of the battery pack.

[0006] In one or more of the above optional embodiments, the first and second separators divide the accommodating space into a first space, a second space, and a third space, with the second space located between the first and second separators. The potting resin is located in the second space, a portion of each battery cell is located in the first space, another portion of each battery cell is located in the second space, and the remaining portion of each battery cell is located in the third space.

[0007] In one or more optional embodiments above, the battery cell includes a first pressure relief portion, the first pressure relief portion is provided in the first space, and the first pressure relief portion and the potting resin are spaced apart.

[0008] In one or more optional embodiments above, the shell includes a first shell and a second shell, the first shell is provided with a receiving space and a top opening, and the second shell closes the top opening. The second partition and the first partition are spaced apart along the second direction. The first shell includes a bottom wall and a first side wall and a second side wall arranged along a third direction. The first partition is connected to the first side wall and the second side wall. The second partition is connected to the first side wall and the second side wall. Wherein, any two of the third direction, the second direction and the first direction are perpendicular to each other, and the first direction is the arrangement direction of multiple battery cells. With the above technical solution, the top opening can be used as an installation port for the battery cell assembly, and / or, can be used as a pouring port for insulating material in a flowing form, and the insulating material in a flowing form can be poured into the receiving space from the top opening under the action of gravity.

[0009] In one or more of the above optional embodiments, a first gap is formed between the battery cell assembly and the first side wall, a portion of the potting resin is located in the first gap, and each battery cell is bonded to the first side wall through the potting resin.

[0010] In one or more of the above optional embodiments, a second gap is formed between the battery cell assembly and the second sidewall, a portion of the potting resin is located in the second gap, and each battery cell is bonded to the second sidewall through the potting resin.

[0011] In one or more of the above optional embodiments, the first separator includes foam, and the first separator and the battery core assembly are interference fit, which can reduce the situation where the potting resin enters the first space.

[0012] In one or more of the above optional embodiments, the second separator includes foam, and the second separator and the battery core assembly are interference fit, which can reduce the situation where the potting resin enters the first space.

[0013] In one or more of the above optional embodiments, the first partition is interference-fitted with the first side wall and the second side wall, so as to facilitate assembly of the first partition to the shell.

[0014] In one or more of the above optional embodiments, the second partition is interference-fitted with the first side wall and the second side wall, so as to facilitate assembly of the second partition to the shell.

[0015] In one or more of the above optional embodiments, the battery pack includes a temperature sensor. The temperature sensor includes a detection portion and a lead. The detection portion is located in the second space, and the potting resin secures the detection portion and the battery cell assembly. The first separator has a third opening, and the lead extends through the third opening into the first space.

[0016] In one or more optional embodiments above, the potting resin includes at least one of a potting glue and a foaming glue.

[0017] According to a second aspect of the present application, there is provided an electrical device comprising the above battery pack.

[0018] Additional aspects and advantages of the embodiments of the present application will be described, shown, or explained in part in the following description through implementation of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the dimensions in the drawings do not constitute proportional limitations.

[0020] Figure 1 A schematic structural diagram of a battery pack provided in one embodiment of the present application;

[0021] Figure 2 for Figure 1 The structural explosion diagram of the battery pack is shown;

[0022] Figure 3 for Figure 1 The battery pack is shown as a top view without the second housing;

[0023] Figure 4 for Figure 1 The battery pack is shown as a top view without the second housing and without glue filling;

[0024] Figure 5 for Figure 2 The diagram shows the overall structure when the first separator and the second separator are both assembled in the battery cell assembly;

[0025] Figure 6 for Figure 5 One of the axonometric drawings;

[0026] Figure 7 for Figure 6 Structural explosion diagram;

[0027] Figure 8 for Figure 7 A schematic structural diagram of a first separator is shown;

[0028] Figure 9 for Figure 7 One of the isometric views of the battery cell is shown;

[0029] Figure 10 for Figure 7 Another isometric view of the battery cell is shown;

[0030] Reference numerals:

[0031] 10. Housing; 10a. Accommodation space; 10aa. First space; 10ab. Second space; 10ac. Third space; 11. First housing; 11a. Top opening; 111. Bottom wall; 112. First side wall; 113. Second side wall; 114. Third side wall; 115. Fourth side wall; 116. Fifth side wall; 12. Second housing;

[0032] 101, first gap;

[0033] 102, second gap;

[0034] 20. Battery cell assembly; 21. Battery cell; 211. First pressure relief portion; 212. Battery cell housing; 213. Second pressure relief portion; 21a. Part of the battery cell; 21b. Another part of the battery cell; 21c. The remaining part of the battery cell; 22. Circuit board;

[0035] 30. Electrical connector; 31. Plug-in portion; 32. First electrical connection portion; 33. Second electrical connection portion;

[0036] 41. First conductive member; 42. Second conductive member;

[0037] 50. Potting resin;

[0038] 60, first partition; 60a, first opening; 60b, third opening;

[0039] 70, second partition; 70a, second opening;

[0040] 80. Temperature detection element; 81. Detection unit; 82. Lead wire;

[0041] 90. Third pressure relief portion; 90a. Through hole; 901. Diaphragm. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0043] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0044] When a component is referred to as being “disposed on” another component, it can be directly disposed on the other component or there may be a component intervening therebetween. When a component is referred to as being “connected to” another component, it can be directly connected to the other component or there may be a component intervening therebetween.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0046] It is understood that when two elements are arranged parallel or perpendicular, a tolerance of 0-±5% is allowed for the angle between them. For example, when there is a tolerance for the perpendicularity of the two elements, if one element is tilted toward or away from the other, the tolerance range between the two elements is greater than 0° and less than or equal to 4.5°. When the projections of the two elements are the same or overlap, a tolerance of 0-±10% is allowed for the two elements. For example, if the projections of one element and the other have the same shape, the projections have a tolerance of 0-±10%.

[0047] The technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0048] In most related technologies, multiple battery cells are first fixed with a bracket, and then resin is poured in. Once the gaps between the battery cells and the casing are filled and overflowing from the filling port, the battery cells are encapsulated in the casing. This results in excessive use of resin, a heavier battery pack, and reduced energy density.

[0049] An embodiment of the present application provides a battery pack, which includes: a shell, a first separator, a second separator, a cell assembly and a potting resin; the shell is provided with a accommodating space; the first separator is located in the accommodating space, and the first separator is provided with a first opening; the second separator is located in the accommodating space, and the second separator is provided with a second opening; the cell assembly includes a plurality of cells, each cell passes through the first opening and the second opening, and each cell is located between the first separator and the second separator; the potting resin is at least partially provided between the first separator and the second separator; the shell, the cell assembly, the first separator and the second separator are bonded and fixed by the potting resin.

[0050] In the battery pack described above, the first and second separators and the housing can enclose a localized potting space. The volume of this localized potting area can be adjusted by adjusting the relative positions of the first and second separators. Compared to completely filling the containment space, this reduces the amount of potting resin used and improves the energy density of the battery pack.

[0051] The following will describe some embodiments of the present application in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0052] Figure 1 This is a schematic diagram of the structure of a battery pack provided in one embodiment of the present application. Figure 2 for Figure 1 The exploded view of the battery pack structure is shown. Figure 4 for Figure 1 The battery pack shown is a top view without the second shell and without glue filling.

[0053] Please combine Figure 4 See also Figure 1 and Figure 2 According to some embodiments of the present application, the battery pack includes a shell 10 and a cell assembly 20. The shell 10 can serve as a protective structure for the cell assembly 20, and a accommodating space 10a is provided therein. The cell assembly 20 is arranged in the accommodating space 10a.

[0054] In some embodiments, as Figure 2 As shown, the battery pack includes an electrical connector 30, which is provided on a side wall of the housing 10. The electrical connector 30 includes a plug-in portion 31, a first electrical connection portion 32, and a second electrical connection portion 33. The plug-in portion 31 is fixed to a side wall of the housing 10 and partially exposed outside the accommodating space 10a. The plug-in portion 31 is configured to be electrically connected to an external device. The first electrical connection portion 32 and the second electrical connection portion 33 are both provided in the accommodating space 10a, and the first electrical connection portion 32 and the second electrical connection portion 33 are both electrically connected to the battery cell assembly 20. As an example, the electrical connector 30 includes an aviation plug.

[0055] In some embodiments, the external device includes an electrical device, and the plug-in portion 31 and the electrical device are plugged into and matched with each other to provide electrical energy to the electrical device.

[0056] In some embodiments, please combine Figure 2 See also Figure 3 or Figure 4 The housing 10 includes a first housing 11 , which is provided with the aforementioned accommodation space 10 a and a top opening 11 a communicating with the accommodation space 10 a .

[0057] In some embodiments, the first housing 11 is substantially box-shaped.

[0058] In some embodiments, the top opening 11 a of the first housing 11 is open.

[0059] In some embodiments, please continue to combine Figure 2 See also Figure 3 or Figure 4The housing 10 includes a second housing 12 connected to the first housing 11 to close the top opening 11a. For example, the second housing 12 is detachably sealed to the open top of the first housing 11 via a sealing member. For example, the sealing member includes, but is not limited to, silicone, UV curable adhesive, etc.

[0060] In some embodiments, as Figure 2 As shown, the second shell 12 is substantially a cover.

[0061] In some embodiments, the circuit board 22 is disposed in the second housing 12. Along the first direction X, the battery cell assembly 20, the circuit board 22, the second housing 12 and the electrical connector 30 are sequentially disposed.

[0062] In some embodiments, as Figure 3 or Figure 4 As shown, the first housing includes a bottom wall 111, a first side wall 112, a second side wall 113, a third side wall 114, and a fourth side wall 115. Along a first direction X, the bottom wall 111 and the top opening 11a are disposed opposite each other; along a second direction Y, the third side wall 114 and the fourth side wall 115 are disposed opposite each other; and along a third direction Z, the first side wall 112 and the second side wall 113 are disposed opposite each other. Any two of the third direction Z, the second direction Y, and the first direction X are perpendicular to each other.

[0063] In some embodiments, the accommodating space 10 a may be enclosed by a bottom wall 111 , a first side wall 112 , a second side wall 113 , a third side wall 114 , and a fourth side wall 115 .

[0064] In some embodiments, as Figure 2 As shown, the battery cell assembly 20 includes a plurality of battery cells 21 arranged along a first direction X. The plurality of battery cells 21 are electrically connected to each other, with separate positive and negative terminals remaining as the overall positive or negative terminal of the battery cell assembly 20. Alternatively, an integrated busbar can be connected to the positive or negative terminals of each battery cell to form the overall positive or negative terminal of the battery cell assembly 20. Specific electrical connection methods between the battery cells include series connection, parallel connection, or a combination of series and parallel connection.

[0065] In some embodiments, each battery cell 21 is a cylindrical hard shell battery cell. As an example, Figure 2 、 Figures 5 to 7 Each battery cell 21 in the embodiment is a cylindrical hard shell battery cell.

[0066] In some embodiments, continuing as Figure 2As shown, the battery cell assembly 20 includes a circuit board 22, which is disposed within the accommodation space 10a. Optionally, the circuit board 22 includes a BMS assembly (Battery Management System), which includes multiple electronic components. The multiple electronic components have multiple functions, including but not limited to control, protection, communication, power calculation, signal transmission, and power transmission of each battery cell.

[0067] In some embodiments, continuing as Figure 4 or Figure 3 As shown, the battery pack includes a first conductive member 41, one end of which is connected to one of the total positive and total negative terminals of the battery cell assembly 20. The other end of the first conductive member 41 is connected to the circuit board 22. As an example, the first conductive member 41 includes a wiring harness.

[0068] In some embodiments, continuing as Figure 4 or Figure 3 As shown, the battery pack includes a second conductive member 42, one end of which is connected to the other of the total positive and total negative terminals of the battery cell assembly 20, and the other end of the second conductive member 42 is connected to the circuit board 22. As an example, the second conductive member 42 includes a copper busbar.

[0069] In some embodiments, both the first electrical connection portion 32 and the second electrical connection portion 33 are electrically connected to the circuit board 22 , and the first electrical connection portion 32 and the second electrical connection portion 33 have different polarities.

[0070] In some embodiments, as Figure 2 and Figure 3 As shown, the battery pack includes a potting resin 50. The potting resin 50 is disposed in the accommodation space 10a and partially covers the battery cell assembly 20. A portion of the battery cell assembly 20 is bonded and fixed to the housing 10 via the potting resin 50. As an example, the potting resin 50 covers a portion of each battery cell, and a portion of each battery cell is bonded and fixed to the housing 10 via the potting resin 50.

[0071] In some embodiments, the potting resin 50 is configured to place an insulating material in a gap between a portion of each battery cell and the housing 10 and solidify the insulating material.

[0072] In some embodiments, a fluid insulating material is filled into the gap between each cell and the housing 10 by potting or injection molding. After curing, the insulating material forms a solid potting resin 50, which bonds and secures the housing 10 and each cell into an integrated structure. Examples of such curing methods include room temperature curing, thermal curing, and ultraviolet curing.

[0073] In some embodiments, the top opening 11a can serve as an installation port for the battery cell assembly 20 and / or as an inlet for the flowing insulating material. The flowing insulating material can be poured into the accommodating space 10a from the top opening 11a under the action of gravity.

[0074] In some embodiments, the insulating material includes one of a potting compound and a foaming compound. Both the potting compound and the foaming compound have fluid properties, and the insulating material can flow into the gap between the battery cell portion and the housing 10. Examples of such potting compounds include epoxy resin potting compounds, polyurethane potting compounds, and silicone potting compounds. Examples of such foaming compounds include polyurethane foaming compounds, polyamide foaming compounds, acrylic foaming compounds, and silicone rubber foaming compounds.

[0075] In some embodiments, please combine Figure 8 See also Figures 2 to 7 In any of the drawings, the battery pack includes a first partition 60 , and the first partition 60 is located in the accommodation space 10 a .

[0076] In some embodiments, the shape of the first partition 60 matches the cross-sectional shape of the housing 10 corresponding to its assembly position.

[0077] In some embodiments, the first partition 60 is directly connected to the housing 10 .

[0078] In some embodiments, the first partition 60 includes foam and is elastically deformable. Along the first direction X, at least a portion of one side of the first partition 60 is interference-fitted with the bottom wall 113 .

[0079] In some embodiments, along the second direction Y, at least a portion of one side of the first spacer 60 is bonded and fixed to the potting resin 50 .

[0080] In some embodiments, please combine Figure 8 See also Figures 2 to 7 In any of the figures, the first separator 60 is provided with a plurality of first openings 60 a , and a portion of each battery cell passes through each first opening 60 a .

[0081] In some embodiments, the first separator 60 is directly connected to the battery cell assembly 20. As an example, the first separator 60 includes foam, and the first separator 60 and each battery cell 21 have an interference fit, which can reduce the situation where the potting resin enters the first space 10aa.

[0082] In other embodiments, the first partition 60 is connected to the housing 10 via a filling material. For example, the filling material includes a potting glue or a foaming glue that is the same or similar to the potting resin 50 ; or a glue or other adhesive having a viscous property that is different from the potting resin 50 .

[0083] In some embodiments, see Figures 2 to 7 In any of the figures, the battery pack includes a second separator 70 . The second separator 70 is located in the accommodation space 10 a , and the second separator 70 is spaced apart from the first separator 60 .

[0084] In some embodiments, the shape of the second partition 70 matches the cross-sectional shape of the housing 10 corresponding to its assembly position.

[0085] In some embodiments, the second partition 70 is directly connected to the housing 10 .

[0086] In some embodiments, the second partition 70 includes foam, and the second partition 70 is elastically deformable. Along the first direction X, at least a portion of one side of the second partition 70 is interference-fitted with the bottom wall 113 .

[0087] In some embodiments, along the second direction Y, the other side of the second spacer 70 is at least partially bonded and fixed to the potting resin 50 .

[0088] In some embodiments, please combine Figure 7 See also Figures 3 to 6 In any of the figures, the second separator 70 is provided with a plurality of second openings 70 a , and a portion of each battery cell passes through each second opening 70 a .

[0089] In some embodiments, the second separator 70 is directly connected to the battery cell assembly 20. As an example, the second separator 70 includes foam, and the second separator 70 and each battery cell have an interference fit, which can reduce the situation where the potting resin enters the second space 10ab.

[0090] In other embodiments, the second partition 70 is connected to the housing 10 via a filling material. For example, the filling material includes a potting glue or a foaming glue that is the same or similar to the potting resin 50 ; or a glue or other adhesive having a viscous property that is different from the potting resin 50 .

[0091] In some embodiments, please combine Figure 6 See also Figure 4 The first partition 60 and the second partition 70 together divide the accommodating space 10a into a first space 10aa, a second space 10ab and a third space 10ac, and the second space 10ab is located between the first partition 60 and the second partition 70.

[0092] In some embodiments, along the second direction Y, the first space 10aa, the second space 10ab, and the third space 10ac are sequentially arranged.

[0093] In some embodiments, a portion 21 a of each battery cell is located in the first space 10 aa .

[0094] In some embodiments, another portion 21 b of each battery cell is located in the second space 10 ab .

[0095] In some embodiments, the remaining portion 21c of each battery cell is located in the third space 10ac.

[0096] In some embodiments, the potting resin 50 is located in the second space 10ab , and the potting resin 50 covers another portion of each battery cell.

[0097] In some embodiments, the first space 10 aa may be enclosed by the fourth sidewall 115 , a portion of the first sidewall 112 , a portion of the second sidewall 113 , and the first partition 60 .

[0098] In some embodiments, the second space 10ab may be enclosed by the first partition 60 , another portion of the first sidewall 112 , another portion of the second sidewall 113 , and the second partition 70 .

[0099] In some embodiments, the third space 10ac may be enclosed by the second partition 70 , a portion of the first sidewall 112 , a portion of the second sidewall 113 , and the third sidewall 114 .

[0100] In some embodiments, as Figure 3 or Figure 4 As shown, the second partition 70 and the second partition 60 are spaced apart along the second direction Y.

[0101] In some embodiments, along the third direction Z, one side of the first partition 60 is at least partially connected to the first side wall 112, such as an interference fit, and the other side of the first partition 60 is at least partially connected to the second side wall 113, such as an interference fit, so as to facilitate the assembly of the first partition 60 to the shell.

[0102] In some embodiments, along the third direction Z, one side of the second partition 70 is at least partially connected to the first side wall 112, such as by interference fit, and the other side of the second partition 70 is at least partially connected to the second side wall 113, such as by interference fit, so as to facilitate the assembly of the second partition 70 to the housing.

[0103] In some embodiments, please combine Figure 8 See also Figures 5 to 7 In any of the figures, the first partition 60 is provided with a third opening 60b passing through the first partition 60 along the second direction Y. As an example, the third opening 60b is in a cross shape, a straight shape or a cross shape.

[0104] The battery pack includes a temperature detection member 80, which includes a detection portion 81 and a wire 82 conductively connected thereto. The detection portion 81 is located in the second space 10ab, and the wire 82 extends through the third opening 60b to the first space 10aa. The wire 82 can be electrically connected to the circuit board 22.

[0105] In some embodiments, the detection portion 81 may be in contact with and connected to one of the battery cells of the battery cell assembly 20 .

[0106] In some embodiments, the potting resin 50 fixes the detection portion 81 , a portion of the wire 82 , and the battery cell assembly 20 within the second space 10 ab .

[0107] In some embodiments, the detection portion 81 may be configured to be flat and fit onto the outer circumference of a single battery cell.

[0108] In some embodiments, the detection unit 81 is a chip thermistor.

[0109] like Figure 9 As shown, a single battery cell includes a first pressure relief portion 211, a battery cell shell 212 and an electrode assembly (not shown). The first pressure relief portion 211 is provided at one end of the battery cell shell 212, and the electrode assembly is provided inside the battery cell shell 212. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The separator is provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet, the separator and the negative electrode sheet are wound or stacked to form the electrode assembly.

[0110] In some embodiments, please combine Figure 9 and Figure 6 See also Figure 3 The first pressure relief portion 211 is provided in the first space 10aa, and the first pressure relief portion 211 is spaced apart from the potting resin 50. As an example, under the separation effect of the first partition 60, the first pressure relief portion 211 is spaced apart from the potting resin 50.

[0111] In some embodiments, the first pressure relief portion 211 includes an explosion-proof valve, and a valve hole of the explosion-proof valve is connected to the first space 10aa.

[0112] In some embodiments, please combine Figure 9 See also Figure 2 The cell case 212 is partially located in the second space 10ab and is partially covered by the potting resin 50 .

[0113] In some embodiments, as Figure 10 As shown, the battery cell includes a second pressure relief portion 213 , which is disposed at one end of the battery cell housing 212 . Along the second direction Y, the second pressure relief portion 213 is disposed opposite to the first pressure relief portion 211 .

[0114] In some embodiments, please combine Figure 10and Figure 6 See also Figure 3 The second pressure relief portion 213 is provided in the third space 10ac, and the second pressure relief portion 213 is spaced apart from the potting resin 50. As an example, under the action of the second partition 70, the second pressure relief portion 213 is spaced apart from the potting resin 50.

[0115] In some embodiments, the second pressure relief portion 213 includes a stress-weakened area, which includes at least one of a groove, a notch, and an area whose material strength is lower than that of its surrounding area.

[0116] In some embodiments, as Figure 4 As shown, along the third direction Z, a first gap 101 is formed between the battery cell assembly 20 and the first sidewall 112. A portion of the potting resin 50 is located in the first gap 101, and a portion of the potting resin 50 can fill the first gap 101. Each battery cell is bonded to the first sidewall 112 through this portion of the potting resin 50.

[0117] In some embodiments, as Figure 4 As shown, along the third direction Z, a second gap 102 is formed between the battery cell assembly 20 and the second side wall 113, another part of the potting resin 50 is located in the second gap 102, and another part of the potting resin 50 can fill the second gap 102, and each battery cell is bonded to the second side wall 113 through this part of the potting resin 50.

[0118] In some embodiments, as Figure 1 or Figure 2 As shown, the battery pack includes a third pressure relief portion 90 , which is provided on one side wall of the first shell 11 . The third pressure relief portion 90 is configured to discharge the gas generated by the battery cell 21 to the external environment.

[0119] In some embodiments, see Figure 1 and Figure 2 The third pressure relief portion 90 includes a diaphragm 901 and through-holes 90a. The diaphragm 901 is connected to one sidewall of the first housing and blocks the plurality of through-holes 90a. The diaphragm 901 reduces the risk of dust and other debris from the external environment penetrating into the accommodation space 10a. Furthermore, the diaphragm 901 shields the plurality of through-holes 90a, enhancing the overall aesthetics of the battery pack.

[0120] In some embodiments, the diaphragm 901 can be configured to melt when the temperature reaches a threshold, thereby opening the plurality of through-holes 90a. For example, after the high-temperature gas generated by the battery cell increases the temperature in the channel connected to the cavity, causing the diaphragm 901 to heat up and melt. The melting of the diaphragm 901 opens the through-holes 90a.

[0121] In other embodiments, the diaphragm 901 is configured to open the plurality of through-holes 90a when a pressure threshold is reached within the channel. For example, after the high-temperature gas generated by the battery cell 21 increases, the pressure within the channel connected to the accommodation space 10a increases. When the pressure within the channel exceeds the threshold of the diaphragm 901, the diaphragm 901 may be broken or opened, thereby opening the plurality of through-holes 90a.

[0122] According to some embodiments of the present application, the present application further provides an electrical device, which includes a battery pack as provided in any of the above embodiments.

[0123] Electrical devices may include, but are not limited to, electric vehicles, electric bicycles, electric motorcycles, energy storage power supplies, etc.

[0124] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery pack, characterized in that: include: A housing having a receiving space; a first partition, located in the accommodating space, wherein the first partition is provided with a plurality of first openings; a second partition, located in the accommodation space, the second partition having a plurality of second openings, and the second partition being spaced apart from the first partition; A battery cell assembly, comprising a plurality of battery cells, wherein each battery cell passes through the first opening and the second opening, and each battery cell is located between the first separator and the second separator; A potting resin is at least partially disposed between the first separator and the second separator, and the housing, the battery cell assembly, the first separator, and the second separator are bonded and fixed by the potting resin.

2. The battery pack according to claim 1, wherein: The first partition and the second partition divide the accommodation space into a first space, a second space and a third space, and the second space is located between the first partition and the second partition; The potting resin is located in the second space, a portion of each of the battery cells is located in the first space, another portion of each of the battery cells is located in the second space, and the remaining portion of each of the battery cells is located in the third space.

3. The battery pack according to claim 2, wherein: The battery core includes a first pressure relief portion, which is disposed in the first space. The first pressure relief portion and the potting resin are spaced apart.

4. The battery pack according to claim 2 or 3, characterized in that: The housing comprises a first housing and a second housing, the first housing being provided with the accommodation space and a top opening, and the second housing closing the top opening; The second partition and the first partition are spaced apart along the second direction; The first shell includes a bottom wall and a first side wall and a second side wall arranged along a third direction, the first partition is connected to the first side wall and the second side wall, and the second partition is connected to the first side wall and the second side wall, wherein any two of the third direction, the second direction and the first direction are perpendicular to each other, and the first direction is the arrangement direction of the multiple battery cells.

5. The battery pack according to claim 4, wherein: A first gap is formed between the battery cell assembly and the first side wall, a portion of the potting resin is located in the first gap, and each of the battery cells is bonded to the first side wall through the potting resin; and / or, A second gap is formed between the battery cell assembly and the second side wall, a portion of the potting resin is located in the second gap, and each of the battery cells is bonded to the second side wall through the potting resin.

6. The battery pack according to claim 4, wherein: The first separator comprises foam, and the first separator and each of the battery cells are interference-fitted; and / or, The second separator comprises foam, and the second separator is interference-fitted with each of the battery cells.

7. The battery pack according to claim 4, wherein: The first partition is interference-fitted with the first side wall and the second side wall; and / or, The second partition is interference-fitted with the first side wall and the second side wall.

8. The battery pack according to claim 5, wherein: The battery pack includes a temperature detection member, the temperature detection member includes a detection portion and a wire, the detection portion is located in the second space, and the potting resin fixes the detection portion and the battery core assembly; The first partition is provided with a third opening, and the wire extends through the third opening to the first space.

9. The battery pack according to claim 5, wherein: The potting resin includes at least one of potting glue and foaming glue.

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

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