Separator, battery pack, battery system and electric equipment

Abstract

The utility model provides a separator, a battery pack, a battery system and electric equipment. The isolation piece comprises an isolation body and a first wire passing structure. The opening in the isolation body penetrates through the isolation body in the thickness direction of the isolation body. The first wire passing structure is arranged at the opening. The first wire passing structure comprises a first wire passing shell and a flame-retardant part. The flame-retardant part is located in the cavity of the first wire passing shell, and a first channel for a line to pass through is formed in the flame-retardant part. The first wire passing structure is arranged at the opening of the isolation body, so that a circuit passing through the opening is convenient to manage and protect. The first wire passing structure comprises the first wire passing shell and the flame-retardant part, the first wire passing shell forms the cavity with the protection function, the first wire passing shell and the flame-retardant part can isolate the two sides of the isolation body under the condition of thermal runaway, and high-temperature gas generated by thermal runaway is prevented from penetrating through the two sides of the isolation body through the opening; the use safety of the battery pack is improved, the stability of a battery system is improved, and the use safety of electric equipment is improved.

Description

Technical Field

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

[0002] A battery pack is an energy storage unit of an electric vehicle. It stores electrical energy and provides power for an electric motor and other electronic devices. CTB (Cell to Body) technology is an electric vehicle battery integration technology. The CTB battery pack directly integrates battery cells into the body structure of the vehicle.

[0003] The CTB battery pack includes a tray, an upper cover, partition beams, and battery modules. The upper cover and the tray are oppositely arranged to form a battery pack housing. A cavity is formed between the oppositely arranged upper cover and the tray. Among them, the partition beams are located in the cavity. The partition beams are used to divide the cavity into multiple sub-cavities, and all the multiple sub-cavities are used to store battery modules. Openings are provided on the partition beams. Connecting pieces passing through the openings connect the battery modules on both sides of the partition beams. The partition beams can help separate the battery modules and prevent heat from concentrating excessively in the battery pack.

[0004] However, in the existing battery packs, the partition effect of the partition beams is not good, resulting in low safety and stability of the battery packs. Summary of the Utility Model

[0005] The present application provides a separator, a battery pack, a battery system, and an electrical device, which improves the partition effect of the separator, avoids high-temperature gases generated by thermal runaway of the battery pack from passing through the openings and penetrating both sides of the isolation body, improves the use safety of the battery pack, improves the stability of the battery system, and improves the use performance of the electrical device.

[0006] In a first aspect, the present application provides a separator, including an isolation body and a first wire-passing structure. An opening is provided on the isolation body. The opening penetrates the isolation body along the thickness direction of the isolation body.

[0007] The first wire-passing structure is arranged at the opening. The first wire-passing structure includes a first wire-passing shell and a flame retardant. The flame retardant is located in the cavity of the first wire-passing shell. A first channel for a circuit to pass through is formed in the flame retardant.

[0008] In the above-mentioned separator, optionally, there are at least two openings. The separator further includes a second wire-passing structure. The second wire-passing structure and the first wire-passing structure are respectively arranged in different openings. The second wire-passing structure includes a second wire-passing shell. A second channel for a circuit to pass through is formed on the second wire-passing shell.

[0009] In the above-mentioned separator, optionally, the first wire-passing structure is located in the middle of the length direction of the isolation body.

[0010] And / or, the second wire-passing structure is located at both ends of the isolation body in the length direction.

[0011] In the above-mentioned isolator, optionally, the isolator further includes a first filler. The first filler is located in the cavity of the first wire-passing shell. The first filler covers the circuit located in the first wire-passing shell and is connected to the flame retardant member.

[0012] In the above-mentioned isolator, optionally, the first wire-passing shell includes a first upper shell and a first lower shell. Along the height direction of the isolation body, the first upper shell and the first lower shell are oppositely arranged and enclose a first shell channel.

[0013] The flame retardant member is located in the first shell channel.

[0014] In the above-mentioned isolator, optionally, a first groove is provided on the flame retardant member. The notch of the first groove faces the first upper shell.

[0015] The first groove and the inner peripheral wall of the first upper shell enclose a first channel. At least part of the first filler is located in the first channel.

[0016] In the above-mentioned isolator, optionally, the number of the first grooves is multiple. The multiple first grooves and the inner peripheral wall of the first upper shell enclose multiple first channels.

[0017] Along the length direction of the isolation body, the multiple first channels are arranged at intervals.

[0018] In the above-mentioned isolator, optionally, the number of the flame retardant members is two. Along the thickness direction of the isolation body. The two flame retardant members are arranged at intervals at opposite ends of the first shell channel.

[0019] In the above-mentioned isolator, optionally, along the thickness direction of the isolation body, the end of the flame retardant member does not protrude from the end of the first wire-passing shell.

[0020] In the above-mentioned isolator, optionally, along the thickness direction of the isolation body, the end of the flame retardant member is flush with the end of the first wire-passing shell.

[0021] In the above-mentioned isolator, optionally, a first shell opening is provided on the first upper shell. The first shell opening is communicated with the first shell channel. The first shell channel is communicated with the first channel.

[0022] In the above-mentioned isolator, optionally, the isolator further includes a second filler. The second filler is located in the cavity of the second wire-passing shell. The second filler covers the circuit located in the second wire-passing shell.

[0023] In the above-mentioned isolator, optionally, the second wire-passing structure further includes a connecting member. The first end of the connecting member is connected to the isolation body, and the second end of the connecting member is connected to the second wire-passing shell.

[0024] In the above-mentioned separator, optionally, the second wire-passing shell includes a second upper shell and a second lower shell. Along the height direction of the separator body, the second upper shell and the second lower shell are oppositely arranged and enclose a second shell channel. The second channel is located in the second shell channel.

[0025] In the above-mentioned separator, optionally, a shell groove is provided on the second upper shell. The notch of the shell groove faces away from the separator body. The shell groove is used for allowing a line to pass through.

[0026] In the above-mentioned separator, optionally, a second groove is provided on the second lower shell. The notch of the second groove faces the second upper shell.

[0027] In the above-mentioned separator, optionally, a second shell opening is provided on the second upper shell, and the second shell opening communicates with the second channel.

[0028] In the above-mentioned separator, optionally, both the first wire-passing shell and the second wire-passing shell are connected to the separator body through fasteners.

[0029] In the above-mentioned separator, optionally, the first wire-passing shell includes a ceramic outer shell.

[0030] And / or, the second wire-passing shell includes a ceramic outer shell.

[0031] In a second aspect, the present application provides a battery pack, including a housing, a line, a first power distribution module, a second power distribution module, a plurality of battery modules, and a separator.

[0032] The housing has a battery cavity. The line, the first power distribution module, the second power distribution module, the battery module, and the separator are all located in the battery cavity.

[0033] Along a first direction, the separator divides the battery cavity into a plurality of chambers. The plurality of battery modules are respectively arranged in the plurality of chambers in one-to-one correspondence. Adjacent battery modules are connected by a line; the line passes through the separator.

[0034] Along the first direction, the first power distribution module and the second power distribution module are respectively arranged at opposite ends of the battery cavity. The first power distribution module and the second power distribution module are connected by a line. The line passes through the separator. Both the first power distribution module and the second battery module are electrically connected to the battery module.

[0035] In the above-mentioned battery pack, optionally, the length direction of the separator body of the separator intersects with the first direction. The line includes a first line and a second line.

[0036] The two power distribution modules are connected by the first line. The first line passes through the first wire-passing structure of the separator.

[0037] Adjacent battery modules are connected by a second circuit. The second circuit passes through the second wire-passing structure of the separator.

[0038] In a third aspect, the present application provides a battery system, including a detection component, a control component, and a battery pack. The detection component is connected to the battery pack. Both the detection component and the battery pack are electrically connected to the control component.

[0039] In a fourth aspect, the present application provides an electrical device, including the battery system.

[0040] An embodiment of the present application provides a separator, a battery pack, a battery system, and an electrical device. The separator includes a separator body and a first wire-passing structure. An opening is provided on the separator body. The opening penetrates the separator body along the thickness direction of the separator body. The first wire-passing structure is provided at the opening. The first wire-passing structure includes a first wire-passing shell and a flame retardant member. The flame retardant member is located in the cavity of the first wire-passing shell, and a first channel for the circuit to pass through is formed in the flame retardant member. The separator body is used to separate the spaces on both sides, preventing the heat generated by the thermal runaway of the battery pack from being transmitted to the other side of the separator body through the opening. The opening provided on the separator body is for the circuit to pass through, thereby realizing the electrical connection on both sides of the separator body. By providing the first wire-passing structure at the opening of the separator body, it is convenient to manage and protect the circuit passing through the opening. By setting the first wire-passing structure as the first wire-passing shell and the flame retardant member, the first wire-passing shell forms a first shell channel with a protection function, and the flame retardant member can provide additional protection under the condition of thermal runaway, improving the isolation effect of the separator and preventing the high-temperature gas generated by the thermal runaway from passing through the opening and penetrating both sides of the separator body. The separator provided by the present application improves the use safety of the battery pack, improves the stability of the battery system, and improves the use performance of the electrical device. Description of the Drawings

[0041] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0042] Figure 1 Schematic diagram of the structure of the battery pack provided by the embodiment of the present application Figure 1 ;

[0043] Figure 2 Schematic diagram of the structure of the battery pack provided by the embodiment of the present application Figure 2 ;

[0044] Figure 3 is Figure 2 the enlarged view of area A in

[0045] Figure 4 is Figure 2 the enlarged view of area B in

[0046] Figure 5Schematic diagram of the battery pack provided by the embodiment of the present application without battery modules Figure 1 ;

[0047] Figure 6 Schematic diagram of the battery pack provided by the embodiment of the present application without battery modules Figure 2 ;

[0048] Figure 7 Schematic diagram of the battery pack provided by the embodiment of the present application without battery modules Figure 3 ;

[0049] Figure 8 is Figure 6 Schematic diagram of the structure of area C in ;

[0050] Figure 9 is Figure 6 Schematic diagram of the structure of area D in ;

[0051] Figure 10 is Figure 7 Schematic diagram of the structure of area E in ;

[0052] Figure 11 is Figure 7 Schematic diagram of the structure of area F in ;

[0053] Figure 12 Schematic diagram of the battery pack provided by the embodiment of the present application without battery modules and circuits

[0054] Figure 13 is Figure 12 Schematic diagram of the structure of area G in ;

[0055] Figure 14 is Figure 12 Schematic diagram of the structure of area H in .

[0056] Explanation of reference numerals:

[0057] 100: Housing; 110: Battery cavity; 111: First chamber; 112: Second chamber;

[0058] 200: Battery module;

[0059] 300: Circuit; 310: First circuit; 320: Second circuit;

[0060] 400: Isolator;

[0061] 410: Isolation body;

[0062] 420: First wire-passing structure; 421: First wire-passing shell; 421a: First upper shell; 421b: First lower shell; 422: Flame retardant; 423: First shell opening; 424: First channel;

[0063] 430: Second wire-passing structure; 431: Second wire-passing housing; 431a: Second upper housing; 431b: Second lower housing; 432: Connecting member; 433: Second housing opening; 434: Housing groove;

[0064] 440: Fastener.

[0065] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Description of the Specific Embodiments

[0066] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0067] The battery pack is an energy storage unit of an electric vehicle. It stores electrical energy and provides power for the electric motor and other electronic devices. CTB (Cell to Body) technology is an electric vehicle battery integration technology. The CTB battery pack directly integrates the battery cells into the vehicle body structure. By directly integrating the battery cells into the body structure, the internal space of the vehicle body can be utilized more effectively, thereby increasing the battery capacity and improving the vehicle's cruising range.

[0068] The CTB battery pack includes a tray, an upper cover, a partition beam, and a battery module. The tray and the upper cover are oppositely arranged to form a closed cavity for accommodating the battery module. The tray and the upper cover, as part of the vehicle body structure, increase the overall rigidity and strength of the vehicle body. The partition beam is located in the cavity and is used to divide the cavity into multiple sub-cavities, and all the multiple sub-cavities are used to store the battery module.

[0069] During the use of the CTB battery pack, when the battery cells in the battery pack are in an overcharged or over-discharged state, the internal chemical reaction intensifies, which may trigger thermal runaway. In addition, when the CTB battery pack is subjected to external impact or extrusion, it may cause damage to the internal structure and may also trigger thermal runaway.

[0070] Since the battery modules need to be connected in series through circuits, and at the same time, the power distribution modules in the battery pack also need to be connected through circuits. To allow the circuits to pass through smoothly, openings are provided on the partition beam. The battery modules on both sides of the partition beam are connected through the circuits passing through the openings. At present, plastic parts are arranged at the opening positions of the partition beam to simply isolate the sub-chambers on both sides of the partition beam. The partition beam can help separate the battery modules and prevent heat from concentrating excessively in the battery pack.

[0071] However, when a thermal runaway occurs in the battery module, the plastic part has a low melting point and weak structural strength, and cannot effectively prevent the high-temperature gas generated by the thermal runaway from passing through the opening and intermixing in each sub-chamber. The intermixing of high-temperature gas in the sub-chambers will cause high-voltage safety problems and affect the safety of the entire battery pack. In addition, the high-temperature gas may damage the insulation materials and electrical connections in the battery pack, resulting in electrical short circuits, thus triggering more serious safety problems.

[0072] Therefore, in the existing battery pack, the partition effect of the partition beam is not good, resulting in low safety and stability of the battery pack.

[0073] In view of this, the embodiments of the present application provide an isolation member, a battery pack, a battery system and an electrical device. The isolation member includes an isolation body and a first wire-passing structure. An opening is provided on the isolation body. The opening penetrates the isolation body along the thickness direction of the isolation body. The first wire-passing structure is arranged at the opening. The first wire-passing structure includes a first wire-passing shell and a flame-retardant member. The flame-retardant member is located in the cavity of the first wire-passing shell, and a first channel for the circuit to pass through is formed in the flame-retardant member. The isolation body is used to separate the spaces on both sides, avoiding the heat generated by the thermal runaway of the battery pack from being transmitted to the other side of the isolation body through the opening. The opening provided on the isolation body is for the circuit to pass through, so as to realize the electrical connection on both sides of the isolation body. By arranging the first wire-passing structure at the opening of the isolation body, it is convenient to manage and protect the circuit passing through the opening. By setting the first wire-passing structure as the first wire-passing shell and the flame-retardant member, the first wire-passing shell forms a first shell channel with a protection function, and the first wire-passing shell and the flame-retardant member can separate both sides of the isolation body in the case of thermal runaway, improving the isolation effect of the isolation member and avoiding the high-temperature gas generated by the thermal runaway from passing through the opening and penetrating both sides of the isolation body. By setting the combined structure of the flame-retardant member and the first wire-passing shell, the circuit can be protected under extreme conditions, preventing the spread of heat and high-temperature gas. The isolation member provided by the present application improves the use safety of the battery pack, improves the stability of the battery system, and improves the use performance of the electrical device.

[0074] The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0075] Figure 1 Schematically showing the structural schematic of the battery pack provided by the embodiment of the present application Figure 1 . Figure 2 Schematically showing the structural schematic of the battery pack provided by the embodiment of the present application Figure 2 . Figure 3 It is Figure 2 The structural schematic diagram of area A in Figure 4 It is Figure 2 The structural schematic diagram of area B in Figure 5 Schematically showing the structural schematic of the battery pack provided by the embodiment of the present application that does not include the battery module 200 Figure 1 .

[0076] In the first aspect, referring to Figures 1 to 5 shown in, the embodiment of the present application provides a battery pack. The battery pack includes a housing 100, a circuit 300, a first power distribution module, a second power distribution module, a plurality of battery modules 200, and a separator 400. The housing 100 has a battery cavity 110. The circuit 300, the first power distribution module, the second power distribution module, the battery module 200, and the separator 400 are all located in the battery cavity 110.

[0077] Along the first direction, the separator 400 divides the battery cavity 110 into a plurality of chambers. A plurality of battery modules 200 are correspondingly arranged in the plurality of chambers. Adjacent battery modules 200 are connected by the circuit 300; the circuit 300 passes through the separator 400.

[0078] Along the first direction, the first power distribution module and the second power distribution module are respectively arranged at opposite ends of the battery cavity 110. The first power distribution module and the second power distribution module are connected by the circuit 300. The circuit 300 passes through the separator 400. Both the first power distribution module and the second power distribution module are electrically connected to the battery module 200.

[0079] Exemplarily, referring to Figure 1 shown in, along the first direction, the separator 400 divides the cavity into a first chamber 111 and a second chamber 112. A battery module 200 is arranged in the first chamber 111. A battery module 200 is arranged in the second cavity. The battery module 200 in the first chamber 111 is electrically connected to the battery module 200 in the second chamber 112 through the circuit 300.

[0080] Along the first direction, the first power distribution module and the second power distribution module are respectively arranged at opposite ends of the battery cavity 110. The first direction refers to the direction shown by X in Figure 1 . The first power distribution module and the second power distribution module are connected by the circuit 300, and the circuit 300 passes through the opening on the separator 400.

[0081] By providing the separator 400, the separator 400 divides the battery pack into independent chambers, which can prevent heat accumulation within the battery pack and contribute to enhancing the overall stability and safety of the battery pack.

[0082] In some embodiments, the first power distribution module and the second power distribution module are configured to distribute the electrical energy generated by the battery module 200 to different electrical devices. The first power distribution module and the second power distribution module can provide redundant protection, improving the reliability and safety of the battery pack. When any one of the first power distribution module and the second power distribution module fails, the other can continue to operate to ensure the continuous operation of the battery pack.

[0083] In other embodiments, the first power distribution module and the second power distribution module are configured to distribute the electrical energy generated by the battery module 200 to different electrical devices. By distributing the load across the first power distribution module and the second power distribution module, the load on a single power distribution module can be reduced, extending its service life and improving the efficiency of the battery pack.

[0084] As an implementable embodiment, the length direction of the isolation body 410 of the separator 400 and the first direction cross-line 300 includes a first line 310 and a second line 320.

[0085] The first power distribution module and the second power distribution module are connected through the first line 310. The first line 310 passes through the first wire-passing structure 420 of the separator 400.

[0086] Adjacent battery modules 200 are connected through the second line 320. The second line 320 passes through the second wire-passing structure 430 of the separator 400.

[0087] By providing the first wire-passing structure 420 and the second wire-passing structure 430, in this way, when a thermal runaway occurs in the battery module 200 in any one of the multiple chambers, the first wire-passing structure 420 and the second wire-passing structure 430 of the separator 400 can block the high-temperature gas generated by the thermal runaway, preventing the high-temperature gas generated by the thermal runaway chamber from entering other chambers through the openings. For example, when a thermal runaway occurs in the battery module 200 of the first chamber 111, the first wire-passing structure 420 can prevent the high-temperature gas generated by the first chamber 111 from entering the second chamber 112 through the opening. In this way, the safety impact of the high-temperature gas on the battery module 200 in the second chamber 112 is avoided, the adverse impact on the second cavity caused by the high-temperature gas is avoided, and the possible secondary thermal runaway in the battery pack is avoided, improving the safety and stability of the battery pack.

[0088] The structure of the separator 400 will be introduced in detail below.

[0089] Figure 6Schematic diagram showing the structure of the battery pack provided by the embodiment of the present application without including the battery module 200 Figure 2 。 Figure 7 Schematic diagram showing the structure of the battery pack provided by the embodiment of the present application without including the battery module 200 Figure 3 。 Figure 8 For Figure 6 is the schematic diagram of the structure of area C in Figure 9 For Figure 6 is the schematic diagram of the structure of area D in Figure 10 For Figure 7 is the schematic diagram of the structure of area E in Figure 11 For Figure 7 is the schematic diagram of the structure of area F in

[0090] Second, as shown in reference to Figures 6 to 11 the embodiment of the present application provides a separator 400. The separator 400 includes a separator body 410 and a first wire-passing structure 420. An opening is provided on the separator body 410. The opening penetrates the separator body 410 along the thickness direction of the separator body 410.

[0091] The first wire-passing structure 420 is arranged at the opening. The first wire-passing structure includes a first wire-passing shell 421 and a flame retardant 422. The flame retardant 422 is located in the cavity of the first wire-passing shell 421. A first channel 424 for the circuit 300 to pass through is formed in the flame retardant 422.

[0092] Exemplarily, as shown in reference to Figure 7 the separator body 410 is located in the battery cavity 110. The length direction of the separator body 410 refers to the direction shown by Y in Figure 7 The separator body 410 divides the battery pack into two chambers: a first chamber 111 and a second chamber 112. By providing the separator body 410, the separator body 410 is used to separate the battery modules 200, avoiding the heat generated by the thermal runaway of the battery pack from being transmitted to the other side of the separator body 410 through the opening, thereby improving the thermal management efficiency of the battery pack. By providing an opening on the separator body 410, the opening is used to allow the circuit 300 to pass through to achieve electrical connection between different battery modules 200 and electrical connection between different power distribution modules in the battery pack.

[0093] Furthermore, the first wire-passing structure 420 is arranged at the opening of the separator body 410. The cavity formed by the first wire-passing shell 421 of the first wire-passing structure 420 can be used to protect the circuit 300 passing through the opening. In this way, the first wire-passing shell 421 provides stable structural support for the circuit 300, ensuring that the circuit 300 will not be affected by mechanical stress when passing through the separator body 410 and maintaining the integrity and functionality of the circuit 300.

[0094] Furthermore, a flame retardant member 422 is provided in the first wire passing housing 421. A first channel 424 formed in the flame retardant member 422 is for the wire 300 to pass through. The flame retardant property of the flame retardant member 422 can ensure that the wire 300 at the opening is protected when the battery module 200 undergoes thermal runaway. At the same time, the structures of the first wire passing housing 421 and the flame retardant member 422 can prevent the high-temperature gas generated by thermal runaway from penetrating through the opening to both sides of the isolation body 410, effectively separating both sides of the isolation body 410 and preventing the spread of heat and high-temperature gas, thereby improving the overall safety of the battery pack.

[0095] Exemplarily, the flame retardant member 422 includes a flame retardant compressible foam. The flame retardant compressible foam has flame retardant properties and can provide additional protection in case of fire or high temperature, preventing the spread of flames and high-temperature gas in the battery pack. The compressible foam can adapt to wires 300 of different shapes and sizes and provide a good sealing effect. In addition, the flame retardant compressible foam can absorb and buffer mechanical shocks and vibrations to protect the wire 300 from damage.

[0096] As an implementable embodiment, the first wire passing structure 420 is located in the middle of the isolation body 410 in the length direction. Refer to Figure 7 As shown, the length of the isolation body 410 refers to Figure 7 the direction indicated by Y in

[0097] There is an opening in the middle of the isolation body 410 in the length direction. The first wire passing structure 420 is arranged at the opening. The first wire 310 passes through the first wire passing structure 420, and the first wire 310 is connected to the first power distribution module and the second power distribution module located at both ends of the battery cavity 110.

[0098] Figure 12 Schematically shows the structural schematic diagram of the battery pack provided by the embodiment of the present application without including the battery module 200 and the wire 300. Figure 13 For Figure 12 the structural schematic diagram of the G area in Figure 14 For Figure 12 the structural schematic diagram of the H area in

[0099] As an implementable embodiment, refer to Figures 7 to 12As shown, the first wire-passing housing 421 includes a first upper housing 421a and a first lower housing 421b. Along the height direction of the isolation body 410, the first upper housing 421a and the first lower housing 421b are oppositely arranged and enclose a first housing channel. The flame retardant 422 is located in the first housing channel.

[0100] Exemplarily, referring to Figure 12 and Figure 13 shown, along the height direction of the isolation body 410, the first upper housing 421a and the first lower housing 421b are oppositely arranged and enclose to form a first housing channel. The height direction of the isolation body 410 refers to the direction indicated by Z in Figure 12 In this way, the first housing channel provides a support space for the first circuit 310, which can effectively protect the first circuit 310 from mechanical damage and external impact. In addition, by arranging the flame retardant 422 in the first housing channel, the flame retardant 422 can provide protection for the first circuit 310 in a high-temperature state. In this way, the combined action of the first wire-passing housing 421 and the flame retardant 422 avoids the high-temperature gas generated by thermal runaway from penetrating through the opening on both sides of the isolation body 410, effectively separates both sides of the isolation body 410, and prevents the spread of heat and high-temperature gas. At the same time, the first wire-passing structure 420 provides double protection for the first circuit 310, improves the overall safety of the battery pack, and avoids failures and accidents caused by mechanical damage and high temperature.

[0101] As an implementable embodiment, the first wire-passing housing 421 includes a ceramic outer shell 100. The ceramic material has high hardness and wear resistance, and can effectively resist external mechanical impact, vibration and friction, providing physical protection for the first circuit 310. At the same time, the ceramic material has high-temperature stability and can maintain its physical and chemical properties unchanged in a high-temperature environment. In this way, the first wire-passing housing 421 can provide mechanical protection for the circuit 300 even at high temperatures. In addition, the ceramic material has low thermal conductivity and can provide good thermal insulation effect, preventing heat from being over-conducted in the battery pack and protecting the first circuit 310 from the influence of high temperature.

[0102] As an implementable embodiment, the isolation member 400 further includes a first filling member. The first filling member is located in the cavity of the first wire-passing housing 421. The first filling member covers the circuit 300 located in the first wire-passing housing 421 and is connected to the flame retardant 422.

[0103] Exemplarily, by setting the first filling member, the first filling member is used to cover the first circuit 310 located in the first wire-passing housing 421, improving the connection stability between the first wire-passing structure 420 and the first circuit 310. The first filling member can fix and support the first circuit 310, preventing the first circuit 310 from moving or loosening in the first channel 424, thereby reducing mechanical stress and fatigue damage.

[0104] Meanwhile, the first filling member improves the sealing performance of the first wire-passing structure 420, achieving effective separation of the battery modules on both sides of the isolation body 410 and avoiding high-voltage safety problems caused by the mutual penetration of high-temperature gases in each chamber during thermal runaway.

[0105] Exemplarily, the first filling member includes a high-temperature structural adhesive. The high-temperature structural adhesive has electrical insulation properties, can prevent short circuits between the circuits 300, and improves electrical safety.

[0106] As an implementable embodiment, a first housing opening 423 is provided on the first upper housing 421a. The first housing opening 423 communicates with the first housing channel. The first housing channel communicates with the first channel 424.

[0107] As an implementable embodiment, the first wire-passing housing 421 is connected to the isolation body 410 through a fastener 440.

[0108] Exemplarily, during the assembly process of the first wire-passing structure 420 and the first circuit 310, first, the first lower housing 421b is installed at the opening of the isolation body 410, then the flame retardant member 422 is placed above the first lower housing 421b, the first circuit 310 is placed in the first channel 424, and then the first upper housing 421a is placed above the circuit 300 and the flame retardant member 422. The first upper housing 421a, the first lower housing 421b, and the isolation body 410 are connected through the fastener 440. Finally, the high-temperature structural adhesive is injected into the first channel 424 through the first housing opening 423.

[0109] It can be understood that the high-temperature structural adhesive injected from the first housing opening 423 is in a liquid state. After the high-temperature structural adhesive solidifies, the first filling member is formed.

[0110] Exemplarily, the cross-section of the first housing opening 423 can be circular. The diameter range of the first housing opening 423 is 5 - 8 mm.

[0111] Exemplarily, the cross-section of the first housing opening 423 can be circular. The diameter of the first housing opening 423 is 6 mm.

[0112] Exemplarily, after the assembly of the first wire-passing structure 420 is completed, the assembly gap between the first wire-passing housing 421 and the isolation body 410 ranges from 1 to 2 mm. In this way, the first wire-passing housing 421 will undergo thermal expansion and contraction when the temperature changes. The assembly gap can provide sufficient space to accommodate these changes and avoid deformation or damage of the first wire-passing housing 421 caused by thermal expansion or contraction.

[0113] As an implementable embodiment, a first groove is provided on the flame retardant member 422. The notch of the first groove faces the inner peripheral wall of the first upper housing 421a. The first groove and the inner peripheral wall of the first upper housing 421a surround to form a first channel 424. At least a part of the first filling member is located in the first channel 424.

[0114] Exemplarily, referring to Figures 7 to 13 As shown, the first groove and the inner peripheral wall of the first upper housing 421a surround to form a channel, namely the first channel 424. The first channel 424 extends along Figure 12 the direction shown by X in the figure. The first wire passing housing 421 provides a support space for the wire harness, protecting the first circuit 310 from mechanical damage and external impact. In addition, the design of the first groove of the flame retardant member 422 facilitates the threading and fixing of the first circuit 310 during the manufacturing and assembly processes, improving the assembly efficiency of the first wire passing structure 420.

[0115] As an implementable embodiment, the number of the first grooves is multiple. The multiple first grooves and the inner peripheral wall of the first upper housing 421a surround to form multiple first channels 424. Along the length direction of the isolation body 410, the multiple first channels 424 are arranged at intervals.

[0116] Exemplarily, referring to Figure 13 As shown, a plurality of first grooves arranged at intervals are provided on the flame retardant member 422, and the plurality of first grooves are independently arranged. The plurality of first grooves and the inner peripheral wall of the first upper housing 421a form a plurality of first channels 424. The first channels 424 are used for the first circuit 310 to pass through, and both ends of each first channel 424 communicate with the chambers at both ends of the isolation body 410.

[0117] Since the multiple first channels 424 are independently arranged, multiple first circuits 310 can be respectively threaded through different first channels 424 to avoid the influence of contact between different circuits 300.

[0118] Exemplarily, the first circuit 310 includes a bus bar and a low-voltage communication wire harness. The low-voltage communication wire harness includes multiple wires, and the multiple wires are wrapped in an insulating outer skin. The low-voltage communication wire harness is used for data transmission and the transmission of control signals. The bus bar is mainly used for the transmission of electric energy. The first circuit 310 is used to connect the power distribution module to achieve efficient transmission and distribution of electric energy.

[0119] Exemplarily, the multiple first channels 424 can be respectively used for the bus bar and the low-voltage communication wire harness to pass through.

[0120] In some embodiments, the flame retardant member 422 includes a flame retardant section. Along the thickness direction of the isolation body 410, the flame retardant section penetrates through the first housing channel. In this way, the flame retardant member 422 provides additional structural support for the first circuit 310, enhancing the overall strength and stability of the first wire passing structure 420. At the same time, the penetration design of the flame retardant section also helps to evenly distribute stress and reduce stress concentration.

[0121] Exemplarily, since the flame retardant member 422 needs to be compressed to ensure the tightness of the first housing channel, the height dimension of the flame retardant member 422 is greater than the height dimension of the first housing channel. The height direction of the flame retardant member 422 refers to Figure 12 the direction shown by Z in

[0122] Exemplarily, the difference range between the height dimension of the flame retardant member 422 and the height dimension of the first housing channel is 1.5 - 2.5 mm.

[0123] Exemplarily, the difference between the height dimension of the flame retardant member 422 and the height dimension of the first housing channel is 2 mm.

[0124] It can be understood that the size of the first groove needs to match the bus bar and the low - voltage communication wire harness.

[0125] As a feasible implementation manner, the number of the flame retardant members 422 is two. Along the thickness direction of the isolation body 410, the two flame retardant members 422 are arranged at opposite ends of the first housing channel at intervals.

[0126] In some other embodiments, referring to Figure 12 and Figure 13 as shown, the number of the flame retardant members 422 is two. Along the thickness direction of the isolation body 410, the two flame retardant members 422 are respectively arranged at opposite ends of the first housing channel. In this way, it helps to distribute the end stress, reduce the end stress concentration phenomenon, provide end electrical protection for the first circuit 310, and ensure the safety of the ends of the first circuit 310 and the first wire passing structure 420. The thickness direction of the isolation body 410 refers to Figure 12 the direction shown by X in

[0127] As a feasible implementation manner, along the thickness direction of the isolation body 410, the ends of the flame retardant member 422 do not protrude from the ends of the first wire passing housing 421. In this way, it can prevent the ends of the flame retardant member 422 from being impacted or worn externally. At the same time, the structure that the ends of the flame retardant member 422 do not protrude from the ends of the first wire passing housing 421 also simplifies the assembly process of the first wire passing structure 420, reduces the difficulty of alignment and fixation, and improves the assembly efficiency.

[0128] As an achievable implementation manner, along the thickness direction of the isolation body 410, the end of the flame retardant member 422 is flush with the end of the first wire passing housing 421. In this way, the appearance of the entire first wire passing structure 420 is made more consistent and beautiful, improving the aesthetics of the isolator 400.

[0129] As an achievable implementation manner, there are at least two openings. The isolator 400 further includes a second wire passing structure 430. The second wire passing structure 430 and the first wire passing structure 420 are respectively arranged in different openings. The second wire passing structure 430 includes a second wire passing housing 431. A second channel for the circuit 300 to pass through is formed on the second wire passing housing 431.

[0130] As an achievable implementation manner, the second wire passing structure 430 is located at both ends of the isolation body 410 in the length direction.

[0131] Exemplarily, referring to Figure 2 、 Figure 6 、 Figure 7 and Figure 12 as shown, the openings include a first opening and a second opening.

[0132] The first opening is located in the middle of the isolation body 410 in the length direction. The first wire passing structure 420 is arranged at the first opening.

[0133] The second opening is located at both ends of the isolation body 410 in the length direction. The second wire passing structure 430 is arranged at the second opening.

[0134] Exemplarily, the isolation body 410 divides the battery cavity 110 of the battery pack into a first chamber 111 and a second chamber 112. The battery module 200 placed in the first chamber 111 is marked as the first battery module. The battery module 200 placed in the second chamber 112 is marked as the second battery module. The first battery module and the second battery module are connected by a second circuit 320. The second circuit 320 passes through the second wire passing structure 430 at the second opening of the isolation body 410. By arranging the second wire passing structure 430 at opposite ends of the isolation body 410, the series connection between adjacent battery modules 200 is realized. For a battery pack with a complex structure, the first circuit 310 connecting the power distribution module is arranged in the middle of the isolation body 410, and the second circuit 320 connecting the battery module 200 is arranged at opposite ends of the isolation body 410 in the length direction, optimizing the layout of the circuits 300 in the battery pack, avoiding the first circuit 310 and the second circuit 320 from gathering at the same position in the battery pack, and at the same time avoiding the interference of the circuits 300 between the first circuit 310 and the second circuit 320.

[0135] As an achievable implementation manner, referring to Figure 4 、 Figure 9 、Figure 11 , Figure 12 and Figure 14 As shown in Figure 11 , Figure 12 and Figure 14 , the second wire-passing structure 430 further includes a connecting member 432. The first end of the connecting member 432 is connected to the isolation body 410, and the second end of the connecting member 432 is connected to the second wire-passing housing 431.

[0136] Exemplarily, the second circuit 320 includes a connecting piece and a low-voltage communication wire harness. The connecting piece provides a reliable electrical connection to ensure stable voltage and current transmission between the battery modules 200.

[0137] Exemplarily, considering that the material of the isolation body 410 is metal, and during the assembly process of the battery pack, the joints of the battery modules 200 need to be welded to the connecting piece to achieve a reliable electrical connection. Therefore, a connecting member 432 is provided between the second wire-passing housing 431 and the isolation body 410. The connecting member 432 can be a plastic part to avoid damage to the isolation body 410 caused by welding the joints of the battery modules 200 to the connecting piece.

[0138] Exemplarily, the connecting member 432 is not only connected to the isolation body 410, but also connected to the housing 100 of the battery pack to protect the isolation body 410 and the housing 100 and prevent the welding process from affecting the structural stability of the isolation body 410 and the housing 100.

[0139] Exemplarily, the connecting member 432 has a connecting groove, and the notch of the connecting groove faces the isolation body 410. The connecting member 432 is connected to the isolation body 410 through the connecting groove.

[0140] As an implementable embodiment, the second wire-passing housing 431 includes a second upper housing 431a and a second lower housing 431b. Along the height direction of the isolation body 410, the second upper housing 431a and the second lower housing 431b are oppositely arranged and surround to form a second housing channel. The second channel is located in the second housing channel.

[0141] Exemplarily, referring to Figure 4 , Figure 9 , Figure 11 , Figure 12 and Figure 14 As shown, along the height direction of the isolation body 410, the second upper housing 431a and the second lower housing 431b are oppositely arranged and surround to form a second housing channel. The second channel is located in the second housing channel. In this way, the second wire-passing housing 431 provides a support space for the second circuit 320 and can effectively protect the second circuit 320 from mechanical damage and external impact. The height direction of the isolation body 410 refers to the direction indicated by Z in Figure 12 .

[0142] As an implementable embodiment, the second wire-passing housing 431 includes a ceramic housing 100. The ceramic material has high hardness and wear resistance, and can effectively resist external mechanical impacts, vibrations and frictions, providing physical protection for the second circuit 320. At the same time, the ceramic material has high-temperature stability and can maintain its physical and chemical properties unchanged in a high-temperature environment. In this way, the second wire-passing housing 431 can provide mechanical protection for the second circuit 320 even at high temperatures. In addition, the ceramic material has low thermal conductivity and can provide good thermal insulation effect, preventing heat from being over-conducted in the battery pack and protecting the second circuit 320 from the influence of high temperatures.

[0143] As an implementable embodiment, the spacer 400 further includes a second filling member. The second filling member is located in the cavity of the second wire-passing housing 431. The second filling member covers the circuit 300 located in the second wire-passing housing 431.

[0144] Exemplarily, by providing the second filling member and covering the second circuit 320 located in the second wire-passing housing 431 with the second filling member, the overall strength and stability of the second wire-passing structure 430 are improved. The second filling member can fix and support the second circuit 320, preventing the second circuit 320 from moving or loosening in the second channel, thereby reducing damage to the second circuit 320.

[0145] At the same time, the second filling member improves the sealing performance of the second wire-passing structure 430, realizes effective separation of the battery modules on both sides of the isolation body 410, and avoids the high-voltage safety problem caused by the mutual penetration of high-temperature gases in each chamber during thermal runaway.

[0146] Exemplarily, the second filling member includes a high-temperature structural adhesive. The high-temperature structural adhesive has electrical insulation performance and improves electrical safety.

[0147] As an implementable embodiment, a second housing opening 433 is provided on the second upper housing 431a, and the second housing opening 433 communicates with the second channel.

[0148] As an implementable embodiment, the second wire-passing housing 431 is connected to the isolation body 410 through a fastener 440.

[0149] Exemplarily, during the assembly process of the second wire-passing structure 430 and the second circuit 320, first connect the plastic part to the housing 100 through the fastener 440, then install the second lower housing 431b above the plastic part, then place the second circuit 320 above the second lower housing 431b, and then place the second upper housing 431a above the second circuit 320. Connect the second upper housing 431a, the second lower housing 431b, the plastic part and the isolation body 410 through the fastener 440. Finally, inject the high-temperature structural adhesive into the second channel through the second housing opening 433.

[0150] It is understandable that the high-temperature structural adhesive injected from the opening 433 of the second housing is in a liquid state. After the high-temperature structural adhesive solidifies, a second filling member is formed.

[0151] Exemplarily, the fastener 440 includes a bolt and a nut.

[0152] Exemplarily, the fastener 440 includes an M6 blind rivet nut and an M6 fastening bolt.

[0153] Exemplarily, the cross-section of the opening 433 of the second housing can be circular. The diameter of this circular size ranges from 5 to 7 mm.

[0154] Exemplarily, the cross-section of the opening 433 of the second housing can be circular. The diameter of this circular size is 6 mm.

[0155] Exemplarily, the assembly gap range between the second wire passing housing 431 and the isolation body 410 after assembly is 1 to 2 mm. The second wire passing housing 431 will undergo thermal expansion and contraction when the temperature changes. The assembly gap can provide sufficient space to accommodate these changes and prevent the first wire passing housing 421 from being deformed or damaged due to thermal expansion or contraction.

[0156] As an implementable embodiment, a housing groove 434 is provided on the second upper housing 431a. The notch of the housing groove 434 faces away from the isolation body 410. The housing groove 434 is used for the line 300 to pass through.

[0157] Exemplarily, the low-voltage communication wire harness passes through the housing groove 434. The housing groove 434 provides mechanical protection for the low-voltage communication line 300, preventing the low-voltage communication line 300 from moving or being damaged under vibration or impact, and enhancing the mechanical stability and reliability of the second line 320. By providing the housing groove 434 on the second upper housing 431a, the internal space of the battery pack can be utilized more effectively, reducing unnecessary space waste.

[0158] It is understandable that the size of the housing groove 434 needs to match the size of the second line 320.

[0159] As an implementable embodiment, a second groove is provided on the second lower housing 431b. The notch of the second groove faces the second upper housing 431a.

[0160] Exemplarily, referring to Figure 12 and Figure 14 as shown, a channel, namely the second channel, is formed by surrounding the inner peripheral wall of the second groove and the second lower housing 431b. The second channel extends along the Figure 12 direction shown by X in

[0161] In a third aspect, the present application provides a battery system, including a detection component, a control component, and a battery pack. The detection component is connected to the battery pack. Both the detection component and the battery pack are electrically connected to the control component.

[0162] Exemplarily, the detection component is used to detect the temperature and pressure in the chamber. When thermal runaway occurs in the first chamber 111 of the battery pack, the control component obtains the temperature and pressure information of the chamber, and the control component controls the battery module 200 to cut off the power, so as to avoid further damage to the battery module 200 caused by thermal runaway.

[0163] Exemplarily, the detection component includes a temperature sensor and a pressure sensor.

[0164] The control component includes a battery management system. The battery management system is responsible for collecting and processing data from the temperature sensor and the pressure sensor. The battery management system can trigger a relay or a circuit breaker in the battery pack to cut off the power supply of the battery pack and prevent further thermal runaway and electrical faults.

[0165] The battery management system sends alarm information to an external system, such as a vehicle control system or a remote monitoring platform, through a communication interface (such as a CAN bus, Ethernet).

[0166] It can be understood that since the battery system of the present application adopts the technical solution of the above battery pack embodiment, it at least has the beneficial effects brought by the technical solution of the above embodiment, which will not be elaborated here one by one.

[0167] In a fourth aspect, the present application provides an electrical device, including a battery system.

[0168] The electrical devices provided by the present application include body energy storage devices, electric vehicles, household electrical loads, commercial electrical loads, industrial electrical loads, etc. The present application does not limit the electrical devices. The electrical devices mentioned in the present application can prevent thermal runaway in one chamber from spreading to other chambers through the opening, improving the use safety of the electrical devices.

[0169] It can be understood that since the electrical device of the present application adopts the technical solution of the above battery system embodiment, it at least has the beneficial effects brought by the technical solution of the above embodiment, which will not be elaborated here one by one.

[0170] Those skilled in the art will readily think of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0171] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. An isolation member, characterized in that, Comprising: An isolation body, an opening is provided on the isolation body, and the opening penetrates the isolation body along the thickness direction of the isolation body; A first wire-passing structure, the first wire-passing structure is arranged at the opening, the first wire-passing structure includes a first wire-passing shell and a flame retardant member, the flame retardant member is located in the cavity of the first wire-passing shell, and a first channel for the circuit to pass through is formed in the flame retardant member.

2. The spacer according to claim 1, wherein, There are at least two of the openings, and the isolation member further includes a second wire-passing structure, and the second wire-passing structure and the first wire-passing structure are respectively arranged in different ones of the openings; The second wire-passing structure includes a second wire-passing shell, and a second channel for the circuit to pass through is formed on the second wire-passing shell.

3. The spacer according to claim 2, wherein, The first wire-passing structure is located in the middle of the isolation body in the length direction; And / or, the second wire-passing structure is located at both ends of the isolation body in the length direction.

4. The spacer according to claim 2, wherein The isolation member further includes a first filling member, the first filling member is located in the cavity of the first wire-passing shell, the first filling member wraps the circuit located in the first wire-passing shell, and is connected to the flame retardant member.

5. The spacer according to claim 4, wherein The first wire-passing shell includes a first upper shell and a first lower shell, along the height direction of the isolation body, the first upper shell and the first lower shell are oppositely arranged and surround to form a first shell channel; The flame retardant member is located in the first shell channel.

6. The spacer according to claim 5, wherein A first groove is provided on the flame retardant member; the notch of the first groove faces the first upper shell; The first groove and the inner peripheral wall of the first upper shell surround to form the first channel; At least part of the first filling member is located in the first channel.

7. The spacer according to claim 6, characterized in that, The number of the first grooves is multiple, and the multiple first grooves and the inner peripheral wall of the first upper shell surround to form multiple first channels; Along the length direction of the isolation body, the multiple first channels are arranged at intervals.

8. The spacer according to any one of claims 5-7, characterized in that, The number of the flame retardant members is two, and along the thickness direction of the isolation body, the two flame retardant members are arranged at intervals at the opposite ends of the first shell channel.

9. The spacer according to any one of claims 2-7, characterized in that, Along the thickness direction of the isolation body, the end of the flame retardant member does not protrude from the end of the first wire-passing shell.

10. The spacer according to any one of claims 2-7, characterized in that, Along the thickness direction of the isolation body, the end of the flame retardant member is flush with the end of the first wire-passing shell.

11. The spacer according to claim 5, wherein A first shell opening is provided on the first upper shell, the first shell opening communicates with the first shell channel; the first shell channel communicates with the first channel.

12. The spacer according to any one of claims 2-7, characterized in that, The second wire-passing structure further includes a connecting member, the first end of the connecting member is connected to the isolation body, and the second end of the connecting member is connected to the second wire-passing shell.

13. The spacer according to claim 12, wherein, The isolation member further includes a second filling member, the second filling member is located in the cavity of the second wire-passing shell, and the second filling member wraps the circuit located in the second wire-passing shell.

14. The spacer according to claim 13, wherein, The second wire-passing shell includes a second upper shell and a second lower shell, along the height direction of the isolation body, the second upper shell and the second lower shell are oppositely arranged and surround to form a second shell channel, and the second channel is located in the second shell channel.

15. The spacer according to claim 14, characterized in that, A housing recess is provided on the second upper housing, and the opening of the housing recess faces away from the isolation body. The housing recess is used for the passage of the circuit.

16. The spacer according to claim 14, wherein A second recess is provided on the second lower housing, and the opening of the second recess faces the second upper housing.

17. The spacer according to claim 14, wherein A second housing opening is provided on the second upper housing, and the second housing opening communicates with the second channel.

18. The spacer according to any one of claims 2-7, characterized in that, Both the first wire passing housing and the second wire passing housing are connected to the isolation body by fasteners.

19. The spacer according to any one of claims 2-7, characterized in that, The first wire passing housing includes a ceramic outer shell; and / or, the second wire passing housing includes a ceramic outer shell.

20. A battery pack, characterized in that, It includes an outer shell, a circuit, a first power distribution module, a second power distribution module, a plurality of battery modules, and the isolation member according to any one of claims 1-19; The outer shell has a battery cavity, and the circuit, the first power distribution module, the second power distribution module, the battery module, and the isolation member are all located in the battery cavity; Along a first direction, the isolation member divides the battery cavity into a plurality of chambers, and the plurality of battery modules are correspondingly arranged in the plurality of chambers one by one; adjacent battery modules are connected by the circuit; the circuit passes through the isolation member; Along the first direction, the first power distribution module and the second power distribution module are respectively arranged at opposite ends of the battery cavity; The first power distribution module and the second power distribution module are connected by the circuit, and the circuit passes through the isolation member; both the first power distribution module and the second power distribution module are electrically connected to the battery module.

21. The battery pack according to claim 20, characterized in that, The length direction of the isolation body of the isolation member intersects the first direction; The circuit includes a first circuit and a second circuit; the first power distribution module and the second power distribution module are connected by the first circuit; The first circuit passes through the first wire passing structure of the isolation member; Adjacent battery modules are connected by the second circuit; The second circuit passes through the second wire passing structure of the isolation member.

22. A battery system, characterized in that, It includes a detection member, a control member, and the battery pack according to claim 20. The detection member is connected to the battery pack, and both the detection member and the battery pack are electrically connected to the control member.

23. An electrical device, characterized in that, It includes the battery system according to claim 22.

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