Battery pack and electric equipment

Abstract

The utility model relates to a battery pack and electric equipment. The battery pack comprises a shell, a battery module, a separator and a top wall, the shell is provided with a containing space and a first opening communicated with the containing space, the shell is provided with a bottom wall, and the bottom wall and the first opening are oppositely arranged in the first direction. The battery module is arranged in the accommodating space, the battery module comprises a first battery cell group and a second battery cell group which are arranged at intervals along a second direction, and the first direction is perpendicular to the second direction. The separator is arranged between the first battery cell group and the second battery cell group, the separator is connected to the shell, and the first battery cell group and the second battery cell group are both fixed with the separator. The top wall is connected to the housing and covers the first opening. According to the battery pack and the electric equipment, the battery module can be conveniently mounted in a shell, meanwhile, the first battery cell group and the second battery cell group are more simply and conveniently fixed with the separator, and the battery pack and the electric equipment are particularly suitable for mounting multiple modules in the shell.

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] Power equipment such as cars, ships and drones usually use battery packs as power sources. Battery packs usually include a shell and a battery module. The battery module is housed in the shell and fixed to the shell. In order to increase the voltage or current, battery packs often use multiple modules connected in series or in parallel. However, it is difficult to put multiple modules into the shell, and the shell and the battery module are prone to compression, which can easily cause damage to the battery module. Utility Model Content

[0003] The purpose of the present application is to provide a battery pack and electrical equipment, aiming to improve the problem of difficulty in installing the battery module into the shell.

[0004] According to a first aspect of the present application, a battery pack is provided, characterized in that it includes a shell, a battery module, an isolating member and a top wall. The shell has a accommodating space and a first opening communicating with the accommodating space, and the shell has a bottom wall, and the bottom wall is arranged opposite to the first opening along a first direction. The battery module is arranged in the accommodating space, and the battery module includes a first battery cell group and a second battery cell group arranged at intervals along a second direction, wherein the first direction is perpendicular to the second direction. The isolating member is arranged between the first battery cell group and the second battery cell group, and the isolating member is connected to the shell, and the first battery cell group and the second battery cell group are both fixed to the isolating member. The top wall is connected to the shell and covers the first opening.

[0005] In the above technical solution, the first battery cell group and the second battery cell group are fixed to the shell through an isolating member, which can adaptably reduce the interference between the first battery cell group and the second battery cell group and the shell, making it convenient for the battery module to be installed into the shell. At the same time, the fixation of the first battery cell group and the second battery cell group to the isolating member is also simpler and more convenient, which is particularly suitable for the installation of multiple modules into the shell.

[0006] In one or more / any one of the above optional embodiments, the housing is provided with a fixing groove, the fixing groove is provided along the first direction, a portion of the fixing groove is located between the first battery cell group and the second battery cell group, and the isolation member is at least partially provided in the fixing groove. During installation, the isolation member can be directly inserted into the fixing groove, and the fixing groove can position the isolation member at a designated position to be installed, so as to facilitate the positioning and installation of the isolation member.

[0007] In one or more / any one of the above optional embodiments, the isolating member includes a main body and a plug-in portion connected to the main body. The plug-in portion is located in the fixing groove, and the first battery cell group and the second battery cell group are both fixed to the main body. Along the second direction, the thickness of the plug-in portion is less than the thickness of the main body. The plug-in portion has a smaller thickness, which makes it easier to plug into the fixing groove; the main body has a larger thickness, has a higher strength and is not easily deformed, which facilitates stable connection with the first battery cell group and the second battery cell group.

[0008] In one or more / any one of the above optional embodiments, the plug-in portion includes a guide portion facing the bottom wall, and along the second direction, the thickness of the guide portion is less than the thickness of the plug-in portion. The guide portion has a smaller thickness and is more convenient for entering the fixing groove, and is used to guide the plug-in portion to be plugged into the fixing groove.

[0009] In one or more / any one of the above optional embodiments, the housing includes a peripheral wall connected to the bottom wall, and the peripheral wall and the bottom wall together define a first opening and a receiving space. The housing includes two protrusions arranged toward the receiving space, and the two protrusions and the peripheral wall form a fixing groove. Along the second direction, the protrusion is located between the first battery cell group and the second battery cell group. The spacer can be arranged in the spacing space between the two protrusions, and the two protrusions realize the positioning and installation of the spacer.

[0010] In one or more / any one of the above optional embodiments, the fixing groove has an insertion port facing the first opening and a second opening away from the peripheral wall. The isolation member can directly enter the insertion port through the first opening and can move along the second opening of the fixing groove until it abuts against the bottom wall, which facilitates the positioning and installation of the isolation member.

[0011] In one or more / any one of the above optional embodiments, the isolating member is provided with a first hole, the first hole is arranged facing the peripheral wall, and the peripheral wall is provided with a second hole penetrating therethrough. The battery pack includes a first fastener, the first fastener is inserted through the second hole and the first hole, and the first fastener fixes the peripheral wall and the isolating member. The first fastener can be directly inserted through the second hole and the first hole outside the housing, and the first fastener fixes the peripheral wall and the isolating member.

[0012] In one or more / any one of the above optional embodiments, the battery pack includes a first buffer. Along the second direction, the first buffer is arranged between the first battery cell group and the peripheral wall, which can reduce the contact scratches or extrusion between the first battery cell group and the peripheral wall, and / or the battery pack includes a second buffer. Along the second direction, the second buffer is arranged between the second battery cell group and the peripheral wall, which can reduce the contact scratches or extrusion between the second battery cell group and the peripheral wall.

[0013] In one or more / any one of the above optional embodiments, the battery pack includes a first adhesive layer, the first adhesive layer is bonded to the first battery cell group and the separator, and fixes the first battery cell group and the separator. And / or the battery pack includes a second adhesive layer, the second adhesive layer is bonded to the second battery cell group and the separator, and fixes the second battery cell group and the separator.

[0014] According to a second aspect of the present application, there is provided an electrical device comprising a battery pack according to any one of the embodiments of the first aspect.

[0015] Additional aspects and advantages of the embodiments of the present application will be described, shown, or explained in part in the subsequent description through implementation of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 represent similar elements, and unless otherwise stated, the dimensions in the drawings do not constitute proportional limitations.

[0017] Figure 1 A schematic diagram showing the structure of a battery pack according to one embodiment of the present application is shown;

[0018] Figure 2 An exploded schematic diagram of a battery pack according to one embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram showing the structure of a battery module according to one embodiment of the present application is shown;

[0020] Figure 4 A schematic diagram showing the structure of an isolating member and a housing in one embodiment of the present application is shown;

[0021] Figure 5 A schematic structural diagram of an isolating member according to one embodiment of the present application is shown;

[0022] Figure 6 for Figure 4 A partial enlarged view of the middle A;

[0023] Description of reference numerals:

[0024] 1000. Battery pack;

[0025] 10. Shell; 11. First opening; 12. Accommodation space; 13. Bottom wall; 14. Peripheral wall; 141. First side wall; 142. Second side wall; 143. Third side wall; 144. Fourth side wall; 145. Second hole; 15. Fixing groove; 151. Protrusion; 152. Insertion port; 153. Second opening;

[0026] 20, battery module; 21, first battery cell group; 211, first battery cell; 212, bus bar; 22, second battery cell group; 221, second battery cell;

[0027] 30. Isolation piece; 31. First hole; 32. Third hole; 33. Main body; 34. Insertion part; 35. Guide part; 36. First adhesive layer; 37. Second adhesive layer;

[0028] 40. Top wall;

[0029] 50. A first fastener;

[0030] 60. Second fastener;

[0031] 70. A first buffer member;

[0032] 80. A second buffer member;

[0033] 90. A third buffer member;

[0034] 100, fourth buffer member;

[0035] 110. Battery management system;

[0036] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly 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, not all of the embodiments.

[0038] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0039] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0040] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] 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.

[0042] Please refer to Figure 1 and Figure 2 , the figure shows the structure of a battery pack 1000 provided in one embodiment of the present application and the exploded structure of the battery pack 1000, the battery pack 1000 comprises a housing 10, a battery module 20 and a top wall 40. The housing 10 has a receiving space 12 and a first opening 11 communicating with the receiving space 12, the battery module 20 can be received in the housing 10 through the first opening 11, the battery module 20 comprises a plurality of battery cell groups, the spacer 30 is used to separate two adjacent battery cell groups, and the top wall 40 covers the first opening 11.

[0043] In some embodiments, the housing 10 includes a bottom wall 13, and the bottom wall 13 is arranged opposite to the first opening 11 along the first direction X. When the battery pack 1000 is assembled, the battery module 20 can be directly placed in the accommodation space 12 of the housing 10 through the first opening 11 and along the peripheral wall 14, and the size of the first opening 11 can be adapted according to the size of the battery module 20, thereby improving the space utilization of the housing 10.

[0044] The battery module 20 includes a plurality of battery cell groups, which are connected in series or in parallel to increase the voltage or current of the entire battery pack 1000. For example, when the battery pack 1000 is applied to power equipment such as drones and automobiles, the plurality of battery cell groups are connected in series or in parallel to provide higher power or endurance for the power equipment.

[0045] Please refer to Figure 2 and Figure 3 For example, the battery module 20 includes two battery cell groups, the two battery cell groups are respectively a first battery cell group 21 and a second battery cell group 22, the first battery cell group 21 and the second battery cell group 22 are arranged in the accommodating space 12 of the shell 10, and the first battery cell group 21 and the second battery cell group 22 are arranged in a spaced relationship along the second direction Y. The second direction Y is perpendicular to the first direction X.

[0046] The first battery cell group 21 includes at least one first battery cell 211, and the second battery cell group 22 includes a plurality of second battery cells 221. Taking the first battery cell group 21 as an example, when a plurality of first battery cells 211 are used, the plurality of first battery cells 211 are stacked along the second direction Y, and the plurality of first battery cells 211 can be connected in series or in parallel through a current collecting component such as a bus bar 212 or a current collecting plate. The second battery cell group 22 can also be arranged similarly. The first direction X is perpendicular to the second direction Y.

[0047] During use of the battery pack 1000 , the first battery cell 211 and the second battery cell 221 expand in the thickness direction along the second direction Y. To fully utilize the space and improve the energy density of the battery pack 1000 , the first battery cell group 21 and the second battery cell group 22 may both be interference fit with the housing 10 .

[0048] In some embodiments, see Figure 1 and Figure 2 The top wall 40 is connected to the housing 10, and the top wall 40 covers the first opening 11 to seal the accommodation space 12 and reduce the entry of external water vapor into the accommodation space 12. Among them, a battery management system 110 can be set between the top wall 40 and the battery module 20. The battery management system 110 monitors the voltage, current, temperature and other parameters of the battery pack 1000 in real time, understands the working status of the battery pack 1000, prolongs the life of the battery pack 1000, and can optimize the discharge process according to the status of the battery pack 1000 and the load demand, and improve the energy utilization efficiency.

[0049] In some embodiments, please refer to Figures 2 to 4 The housing 10 includes a peripheral wall 14 connected to the bottom wall 13 , and the bottom wall 13 and the peripheral wall 14 together define a first opening 11 and an accommodating space 12 .

[0050] In some embodiments, the peripheral wall 14 includes a first side wall 141, a second side wall 142, a third side wall 143 and a fourth side wall 144, the first side wall 141 and the second side wall 142 are arranged opposite to each other along the second direction Y, the third side wall 143 and the fourth side wall 144 are connected between the first side wall 141 and the second side wall 142, the fourth side wall 144 and the third side wall 143 are arranged opposite to each other along the third direction Z, and the first side wall 141, the second side wall 142, the third side wall 143 and the fourth side wall 144 are all connected to the bottom wall 13. The battery module 20 can be interference fit with the third side wall 143 and the fourth side wall 144, and a partial installation gap is reserved between the battery module 20 and the first side wall 141 and the second side wall 142, which can reserve a partial expansion space for the battery module 20 and reduce the extrusion damage of the housing 10 to the battery module 20. Among them, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0051] In some embodiments, please refer to Figure 2The battery pack 1000 includes an isolating member 30, which is received in the receiving space 12 of the housing 10. The isolating member 30 is disposed between the first battery cell group 21 and the second battery cell group 22 to separate the first battery cell group 21 from the second battery cell group 22. The isolating member 30 is connected to the housing 10, and the first battery cell group 21 and the second battery cell group 22 are both fixed to the isolating member 30.

[0052] During installation, the first battery cell group 21 and the second battery cell group 22 can be placed in the accommodating space 12 respectively, and then the separator 30 can be placed between the first battery cell group 21 and the second battery cell group 22, and the separator 30 can be connected and fixed to the housing 10. The first battery cell group 21 and the second battery cell group 22 are fixed to the housing 10 through the separator 30, which can adaptably reduce the interference between the first battery cell group 21 and the second battery cell group 22 and the housing 10, and can facilitate the installation of the battery module 20 into the housing. At the same time, the fixing of the first battery cell group 21 and the second battery cell group 22 to the separator 30 is also simpler and more convenient.

[0053] In some embodiments, the battery pack 1000 includes a first adhesive layer 36 , and the first adhesive layer 36 is bonded to the first battery cell group 21 and the isolation member 30 to fix the first battery cell group 21 and the isolation member 30 .

[0054] In some embodiments, the battery pack 1000 includes a second adhesive layer 37 , and the second adhesive layer 37 is bonded to the second battery cell group 22 and the isolation member 30 to fix the second battery cell group 22 and the isolation member 30 .

[0055] In some embodiments, after the installation into the shell is completed, a connection glue can be dripped between the first battery cell group 21 and the isolating member 30 and between the second battery cell group 22 and the isolating member 30. After the connection glue is cured, a first glue layer 36 is formed between the first battery cell group 21 and the isolating member 30, and a second glue layer 37 is formed between the second battery cell group 22 and the isolating member 30, which can improve the bonding strength between the first battery cell group 21 and the second battery cell group 22 and the isolating member 30. The connection glue can be epoxy resin glue, polyurethane glue or silicone rubber, etc. Exemplarily, the connection glue includes silicone rubber, which has good high temperature resistance, weather resistance and insulation, which can not only improve the applicability of the battery pack 1000, but also make the electrical components and circuits of each battery cell group insulated.

[0056] In some embodiments, an adhesive may be disposed on the side of the isolation member 30 , and then the isolation member 30 is inserted between the first battery cell group 21 and the second battery cell group 22 , and the adhesive is fixed to form a first adhesive layer 36 and a second adhesive layer 37 .

[0057] In some embodiments, please refer to Figure 2 , Figure 4 and Figure 5, the isolating member 30 is provided with a first hole 31, the first hole 31 is arranged facing the peripheral wall 14, the peripheral wall 14 is provided with a second hole 145 penetrating therethrough, the battery pack 1000 includes a first fastener 50, the first fastener 50 can be directly inserted into the second hole 145 and the first hole 31 outside the shell 10, and the first fastener 50 fixes the peripheral wall 14 and the isolating member 30. The third side wall 143 and / or the fourth side wall 144 are provided with a second hole 145. Optionally, the first hole 31 and the second hole 145 can be threaded holes, and the first hole 31 and the second hole 145 are of matching sizes, the first fastener 50 can be a screw or a bolt, etc., and the isolating member 30 can be fixed to the shell 10 by locking the first fastener 50 in the first hole 31 and the second hole 145. In some other embodiments, the first hole 31 and the second hole 145 can also be pin holes or rivet holes, etc., and correspondingly, the first fastener 50 is a pin or a rivet, etc.

[0058] In some other embodiments, the isolation member 30 is provided with a third hole 32, and the third hole 32 is arranged facing the bottom wall 13. The bottom wall 13 is provided with a fourth hole (not shown in the figure) passing through the bottom wall 13. The battery pack 1000 also includes a second fastener 60. By locking the second fastener 60 in the fourth hole and the third hole 32, the isolation member 30 can be fixed to the bottom wall 13, thereby improving the bonding strength between the isolation member 30 and the shell 10.

[0059] Please refer to Figure 4 The housing 10 is provided with a fixing groove 15, the fixing groove 15 is arranged along the first direction X, a portion of the fixing groove 15 is located between the first battery cell group 21 and the second battery cell group 22, and the isolating member 30 is at least partially arranged in the fixing groove 15. For example, the fixing groove 15 can be arranged on both the third side wall 143 and the fourth side wall 144, and the two fixing grooves 15 are arranged opposite to each other along the third direction Z. During installation, the isolating member 30 can be directly inserted into the fixing groove 15, and the fixing groove 15 can position the isolating member 30 at a designated position to be installed, such as the position where the first hole 31 is coaxial with the second hole 145, and then the isolating member 30 is fixed to the housing 10 by the first fastener 50 and the second fastener 60, so as to facilitate the positioning and installation of the isolating member 30.

[0060] In some embodiments, please refer to Figures 4 to 6The housing 10 includes two protrusions 151 disposed toward the accommodation space 12, and the two protrusions 151 and the peripheral wall 14 form a fixing groove 15. For example, two protrusions 151 are disposed on the third side wall 143, and the two protrusions 151 are spaced apart along the second direction Y, and the two protrusions 151 and the third side wall 143 form a fixing groove 15. The isolation member 30 may be disposed in the spacing space between the two protrusions 151. The second hole 145 on the third side wall 143 is connected to the spacing space between the two protrusions 151, and the first fastener 50 may directly enter the spacing space from the outside through the second hole 145 to be locked with the isolation member 30.

[0061] In some embodiments, the fixing groove 15 has an insertion port 152 disposed facing the first opening 11 and a second opening 153 away from the peripheral wall 14, and the second opening 153 can be formed by the two protrusions 151 being spaced apart. The insertion port 152 is connected to the second opening 153, and when the isolating member 30 is installed, the isolating member 30 directly enters the insertion port 152 through the first opening 11, and can move along the second opening 153 of the fixing groove 15 until it abuts against the bottom wall 13, and then is fixed by the first fastener 50 and the second fastener 60.

[0062] In some embodiments, please refer to Figure 5 The isolating member 30 includes a main body 33 and an inserting portion 34 . The inserting portion 34 is located in the fixing groove 15 . The first battery cell group 21 and the second battery cell group 22 are both fixed to the main body 33 .

[0063] In some embodiments, along the second direction Y, the thickness of the plug-in portion 34 is less than the thickness of the main body 33. The plug-in portion 34 is thinner and more convenient to be plugged into the fixing groove 15. The main body 33 is thicker and has higher strength and is not easily deformed, which facilitates stable connection with the first battery cell group 21 and the second battery cell group 22. Optionally, when the third side wall 143 and the fourth side wall 144 are both provided with fixing grooves 15, the isolation member 30 includes two plug-in portions 34, and the two plug-in portions 34 are respectively plugged into the fixing grooves 15 of the third side wall 143 and the fourth side wall 144 of the main body 33, and the main body 33 is located between the two plug-in portions 34, and the second opening 153 avoids the main body 33.

[0064] In some embodiments, the plug-in portion 34 includes a guide portion 35 facing the bottom wall 13, and the thickness of the guide portion 35 is less than the thickness of the plug-in portion 34 along the second direction Y. The guide portion 35 has a smaller thickness, which is more convenient for entering the fixing groove 15, and is used to guide the plug-in portion 34 to be plugged into the fixing groove 15. In some other embodiments, along the direction from the guide portion 35 to the plug-in portion 34 (the first direction X), the thickness of the guide portion 35 gradually increases until it is consistent with the thickness of the plug-in portion 34, so that the plug-in portion 34 can smoothly enter the fixing groove 15.

[0065] Please refer to Figure 2 In some embodiments, the battery pack 1000 includes a first buffer 70. Along the second direction Y, the first buffer 70 is disposed between the first battery cell group 21 and the peripheral wall 14. For example, the first buffer 70 is disposed between the first battery cell group 21 and the first side wall 141 to reduce the extrusion of the first side wall 141 on the first battery cell group 21; for example, when the gap between the first battery cell group 21 and the second battery cell group 22 is small, the plug-in isolation member 30 will push the first battery cell group 21 and the second battery cell group 22, and the first buffer 70 can reduce the contact scratches or extrusion between the first battery cell group 21 and the peripheral wall 14.

[0066] In some embodiments, the second buffer 80 of the battery pack 1000 is disposed between the second battery cell group 22 and the peripheral wall 14 along the second direction Y. The second buffer 80 is disposed between the second battery cell group 22 and the second side wall 142 to reduce the squeezing of the second side wall 142 on the second battery cell group 22. For example, when the gap between the first battery cell group 21 and the second battery cell group 22 is small, the plug-in isolation member 30 will push the first battery cell group 21 and the second battery cell group 22, and the second buffer 80 can reduce the contact scratches or squeezing of the second battery cell group 22 and the peripheral wall 14.

[0067] Both the first buffer member 70 and the second buffer member 80 may be made of flexible buffer materials such as foam, rubber, polyurethane, etc. Exemplarily, the first buffer member 70 and the second buffer member 80 are made of foam, and a glue layer may be provided on the foam, and the glue layer is bonded and fixed to the peripheral wall 14; and, thermal conductive materials may be added to the foam, such as alumina, silicon powder, nano-alumina or graphite, etc., which not only can achieve better shock absorption effect, but also can facilitate the heat of each battery cell group to be transferred to the shell 10.

[0068] Optionally, a third buffer member 90 may be provided between the bottom wall 13 and the first battery cell group 21, and a fourth buffer member 100 may be provided between the second battery cell group 22 and the bottom wall 13, so as to reduce the impact of the first battery cell group 21 and the second battery cell group 22 on the bottom wall 13 during squeezing or installation into the shell, and protect the bottom wall 13 and the first battery cell group 21 and the second battery cell group 22.

[0069] In the second aspect, the present application also provides an electrical device, including the aforementioned battery pack 100. As a result, the electrical device has all the features and characteristics of the aforementioned battery pack 100, which will not be repeated here. The electrical device can be implemented in various specific forms, for example, electronic products such as drones, electric vehicles, electric cleaning tools, energy storage products, electric vehicles, electric bicycles, electric navigation tools, etc. In some scenarios, the electrical device includes but is not limited to: backup power supplies, electrodes, automobiles, motorcycles, power-assisted bicycles, bicycle power tools, large household battery packs and lithium-ion capacitors, etc.

[0070] The above descriptions are merely embodiments of the present application and are not intended to 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 shell having a receiving space and a first opening communicating with the receiving space, wherein the shell has a bottom wall, and along a first direction, the bottom wall is arranged opposite to the first opening; A battery module is disposed in the accommodation space, wherein the battery module comprises a first battery cell group and a second battery cell group arranged at intervals along a second direction, wherein the first direction is perpendicular to the second direction; An isolating member is disposed between the first battery cell group and the second battery cell group, the isolating member is connected to the housing, and the first battery cell group and the second battery cell group are both fixed to the isolating member; A top wall is connected to the housing and covers the first opening.

2. The battery pack according to claim 1, characterized in that: The housing is provided with a fixing groove, the fixing groove is arranged along a first direction, a portion of the fixing groove is located between the first battery cell group and the second battery cell group, and the isolation member is at least partially arranged in the fixing groove.

3. The battery pack according to claim 2, characterized in that: The isolating member comprises a main body and a plug-in portion connected to the main body; The plug-in portion is located in the fixing groove, and the first battery cell group and the second battery cell group are both fixed to the main body; Along the second direction, the thickness of the plug-in portion is smaller than the thickness of the main body portion.

4. The battery pack according to claim 3, characterized in that: The plug-in portion includes a guide portion facing the bottom wall, and along the second direction, a thickness of the guide portion is smaller than a thickness of the plug-in portion.

5. The battery pack according to claim 2 or 3, characterized in that: The housing comprises a peripheral wall connected to the bottom wall, wherein the peripheral wall and the bottom wall together define the first opening and the accommodation space; The housing comprises two protrusions arranged toward the accommodation space, and the two protrusions and the peripheral wall form the fixing groove; Along the second direction, the protrusion is located between the first battery cell group and the second battery cell group.

6. The battery pack according to claim 2 or 3, characterized in that: The fixing groove has an insertion port arranged facing the first opening and a second opening away from the peripheral wall.

7. The battery pack according to claim 5, characterized in that: The isolating member is provided with a first hole, the first hole is arranged facing the peripheral wall, and the peripheral wall is provided with a penetrating second hole; The battery pack includes a first fastener, the first fastener is inserted into the second hole and the first hole, and the first fastener fixes the peripheral wall and the isolation member.

8. The battery pack according to claim 5, characterized in that: The battery pack comprises: A first buffer member, along the second direction, the first buffer member is arranged between the first battery cell group and the peripheral wall; and / or, A second buffer is disposed along a second direction between the second battery cell group and the peripheral wall.

9. The battery pack according to claim 1, characterized in that: The battery pack comprises: A first adhesive layer is bonded to the first battery cell group and the isolation member; and / or, The second adhesive layer is bonded to the second battery cell group and the isolation member.

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

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