Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of battery packs. The battery pack has a first direction and a second direction which are intersected, and comprises a box body, a heating film and a wire, an accommodating space is formed in the box body, and the heating film and the wire are arranged in the accommodating space; the heating film extends along a second direction and is connected with the battery pack in the accommodating space, one end of the wire is connected with the heating film to form a connection point, and the other end is connected with the control unit in the accommodating space; the wire comprises a bending part, the bending part is arranged at the position close to the connecting point, and the lowest position of the bending part in the first direction is lower than the lowest position of the connecting point. In the embodiment of the invention, the condensate water attached to the wire flows to the lower position under the action of gravity, the lowest position of the bending part is lower than the lowest position of the connecting point, and the condensate water attached to the wire flows to the lowest position of the bending part and does not flow to the connecting point; the method has the beneficial effect of avoiding the risk of short circuit caused by condensed water flowing to a connection point.

Description

Technical Field

[0001] The present application belongs to the technical field of battery packs, and specifically relates to a battery pack and electrical equipment. Background Art

[0002] Power batteries have been widely used in electric cars, electric motorcycles, electric bicycles, solar energy, mobile communication terminal products and energy storage products. Since power batteries generate a certain amount of heat during operation, a condensation system is set inside the power battery structure.

[0003] Existing power batteries are also equipped with a heating film, and the heating film is connected to a wire. When the condensation system is working, the water vapor inside the power battery will be cooled and liquefied into condensed water on the insulation layer on the outer surface of the wire. The condensed water will flow down along the insulation layer to the connection between the wire and the heating film. There is a risk that the condensed water will flow to the connection between the wire and the heating film, causing a short circuit in the circuit and causing the power battery to catch fire. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery pack and an electrical device that can solve the problem in the prior art that condensed water on the wires in the battery pack contact the connection points and cause the battery pack to short-circuit.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery pack, which has a first direction and a second direction that intersect each other, and is characterized in that it includes: a box body, a heating film and a wire, wherein a accommodating space is formed in the box body, and the heating film and the wire are arranged in the accommodating space; the heating film extends along the second direction and is used to connect to the battery pack in the accommodating space, one end of the wire is connected to the heating film to form a connection point, and the other end of the wire is used to connect to a control unit in the accommodating space; the wire includes a bending portion, and the bending portion is arranged at a position close to the connection point, and the lowest position of the bending portion along the first direction is lower than the lowest position of the connection point.

[0007] In the practical application of the embodiment of the present application, the battery active material in the battery pack has reduced activity in a low temperature environment, which restricts the charging and discharging capacity of the battery pack. Therefore, the battery pack is usually not allowed to be charged below the preset low temperature. The setting of the heating film is used to heat the battery in a low temperature environment to increase the activity of the battery active material by heating. The two ends of the wire are respectively connected to the control unit and the heating film. The control unit makes the heating film heat up through the wire, and then heats the surface of the battery in the battery pack. The wire and the heating film are connected by connection, and the connection between the wire and the heating film has a connection point. Among them, the wire has a bending portion, and the setting of the bending portion is used to prevent the condensed water attached to the wire from flowing to the connection point to cause a short circuit. Specifically, along the first direction, the lowest position of the bending portion is lower than the lowest position of the connection point. It can be understood that the condensed water attached to the wire flows to the lower place under the action of gravity, and the bending portion is lower than the lowest position of the connection point. Therefore, the condensed water attached to the wire will naturally flow to the lowest point of the bending portion, and will not flow to the connection point, which has the beneficial effect of avoiding the risk of short circuit caused by the condensed water flowing to the connection point.

[0008] Optionally, the bending portion bends downward along the first direction, the lowest position of the bending portion along the first direction is the bending point, and the bending point along the first direction is lower than the lowest position of the connection point.

[0009] Optionally, the battery pack further comprises a support plate disposed in the accommodating space, the support plate being connected to the box body, the support plate being disposed on a side of the heating film facing away from the battery pack, and the bent portion being overlapped with an end portion of the support plate.

[0010] Optionally, the support plate includes a main body portion and a fixing portion connected to the main body portion, the main body portion extends along the second direction, and the fixing portion is arranged at an end of the main body portion; the fixing portion is bent downward along the first direction, and the bent portion overlaps the fixing portion.

[0011] Optionally, a guide groove is provided on a side of the fixing portion facing the bending portion, and the guide groove extends along the bending direction of the fixing portion to an edge of the fixing portion away from the main body portion; the guide groove is recessed along the first direction away from the bending portion.

[0012] Optionally, the battery pack further comprises a connecting member, and the connecting member is arranged on a side of the fixing portion close to the battery pack;

[0013] The bending portion is connected to the fixing portion through the connecting member.

[0014] Optionally, the battery pack further comprises a plurality of end plates, the end plates are connected to the support plate, and two end plates adjacent to each other along the second direction are clamped at two ends of the battery pack;

[0015] The bent portion bypasses a side of the end plate away from the battery pack and is connected to the support plate.

[0016] Optionally, the battery pack has a third direction intersecting the first direction and the second direction, a plurality of the support plates are arranged in sequence along the third direction, and each of the support plates is provided with the heating film.

[0017] Optionally, the battery pack further includes a seal, the connection point is located on a side of the heating film close to the battery pack, and the seal is wrapped around the connection point.

[0018] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a battery pack as described above.

[0019] In the embodiments of the present application, the electrical equipment includes but is not limited to electric vehicles, hybrid vehicles, charging stations and some energy storage systems, and the electrical equipment is equipped with a battery pack as in any of the above embodiments. The two ends of the battery pack wire are respectively connected to the control unit and the heating film. The control unit heats the heating film through the wire, thereby heating the surface of the battery in the battery pack. The wire and the heating film are connected by connection, and the connection between the wire and the heating film has a connection point. Among them, the wire has a bending portion, and the bending portion is set to prevent the condensed water attached to the wire from flowing to the connection point and causing a short circuit. Specifically, along the first direction, the lowest position of the bending portion is lower than the lowest position of the connection point. It can be understood that the condensed water attached to the wire flows to the lower part under the action of gravity, and the bending portion is lower than the lowest position of the connection point. Therefore, the condensed water attached to the wire will naturally flow to the lowest point of the bending portion, and will not flow to the connection point, which has the beneficial effect of avoiding the risk of short circuit caused by the condensed water flowing to the connection point, thereby improving the reliability of the use of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial structural schematic diagram of a battery pack in an embodiment of the present application;

[0021] Figure 2 is a schematic diagram of a partial structure of a battery pack from another angle in an embodiment of the present application;

[0022] Figure 3 In the embodiment of this application Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 It is a structural schematic diagram of a support plate in an embodiment of the present application;

[0024] Figure 5 It is a fixed enlarged schematic diagram in an embodiment of the present application;

[0025] Figure 6 This is a schematic diagram of the connection structure of the wire, the heating film, the support plate and the connection assembly in the embodiment of the present application;

[0026] Figure 7 This is a schematic diagram of the connection structure of the wire, the heating film and the support plate in the embodiment of the present application;

[0027] Figure 8 It is a partial structural enlarged schematic diagram of the wire in the embodiment of the present application;

[0028] Fig. 9 is a schematic diagram of the structure of a battery pack in an embodiment of the present application;

[0029] Fig.10 It is a structural schematic diagram of a box body and components contained in the box body in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. Battery pack; 2. Box body; 3. Accommodating space; 10. Heating film; 20. Wire; 21. Bending portion; 211. Bending point; 30. Connecting point; 40. Support plate; 41. Fixing portion; 411. Guide groove; 42. Main body; 50. End plate; 60. Connector; 70. Control unit; 80. Battery pack; Y, first direction; X, second direction; Z, third direction. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0034] The battery pack and electrical equipment provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0035] See also Figures 1 to 8 An embodiment of the present application provides a battery pack 1, which has a first direction Y and a second direction X intersecting each other, and includes a box body 2, a heating film 10 and a wire 20. A storage space 3 is formed in the box body 2, and the heating film 10 and the wire 20 are arranged in the storage space 3; the heating film 10 extends along the second direction X and is used to connect with the battery pack 80 in the storage space 3, one end of the wire 20 is connected to the heating film 10 to form a connection point 30, and the other end of the wire 20 is used to connect with the control unit 70 in the storage space 3; the wire 20 includes a bending portion 21, and the bending portion 21 is arranged at a position close to the connection point 30, and the lowest position of the bending portion 21 along the first direction Y is lower than the lowest position of the connection point 30.

[0036] In the embodiment of the present application, in actual application, the battery active material in the battery pack 1 has reduced activity in a low temperature environment, which restricts the charging and discharging capacity of the battery pack 1. Therefore, the battery pack 1 is usually not allowed to charge below a preset low temperature. The heating film 10 is provided to heat the battery in a low temperature environment to increase the activity of the battery active material by heating. The two ends of the wire 20 are respectively connected to the control unit 70 and the heating film 10. The control unit 70 makes the heating film 10 heat up through the wire 20, thereby heating the battery surface in the battery pack 1. The wire 20 and the heating film 10 can be connected by welding, and the connection between the wire 20 and the heating film 10 has a connection point 30. Among them, the wire 20 has a bending portion 21, and the setting of the bending portion 21 is used to prevent the condensed water attached to the wire 20 from flowing to the connection point 30 to cause a short circuit. Specifically, along the first direction Y, the lowest position of the bending portion 21 is lower than the lowest position of the connection point 30. It can be understood that the condensed water attached to the wire 20 flows downward due to gravity, and the lowest position of the bending portion 21 is lower than the connection point 30. Therefore, the condensed water attached to the wire 20 will naturally flow to the lowest point of the bending portion 21 instead of flowing to the connection point 30, which has the beneficial effect of avoiding the risk of short circuit caused by the condensed water flowing to the connection point 30.

[0037] In practical applications, the battery pack 1 includes a box body 2, and a storage space 3 is provided in the box body 2. The storage space 3 is used to provide a placement space for the components in the battery pack 1. Specifically, at least one group of battery packs 80 is provided in the storage space 3. At least one group of battery packs 80 are arranged in parallel in the storage space 3. Each group of battery packs 80 is composed of a plurality of cells connected in series or in parallel. The charging and discharging function of the battery pack 1 is essentially the charging and discharging of the battery packs 80 inside it. In addition, in addition to the box body 2, the battery pack 1 also includes a cover plate, which is provided on the upper part of the box body 2 and is fixedly connected to the box body 2. The cover plate is used to cover the storage space 3. After the cover plate covers the storage space 3, it can protect the battery packs 80 in the storage space 3 to prevent external water vapor, dust, etc. from entering the storage space 3 and affecting the performance of the battery pack 80.

[0038] Furthermore, in order to maximize the space utilization of the accommodation space 3, multiple battery packs 80 are compactly arranged in the accommodation space 3. For example, the outer shell of the battery pack 80 may be square in shape, and adjacent battery packs 80 may be in contact with each other through outer surfaces to save space.

[0039] Furthermore, the wire 20 has good flexibility and can be bent, twisted, or folded into a desired shape to adapt to the installation space within the accommodating space 3, but the lowest position of the bending portion 21 along the first direction Y will always be kept lower than the lowest position of the connection point 30 to prevent condensed water from flowing to the connection point 30.

[0040] It should be noted that a battery cell temperature detection unit may also be provided in the accommodating space 3, and the battery cell temperature detection unit is used to monitor the current temperature of the battery pack 80, and send the current temperature value of each monitored battery pack 80 to the control unit 70; the control unit 70 is used to determine whether there is a target battery pack 80 whose current temperature is lower than the preset temperature range according to the current temperature value, and control the heating film 10 to generate heat when it is determined that there is at least one target battery pack 80; the heating film 10 is used to control the temperature of at least one target battery pack 80 so that the temperature of at least one target battery pack 80 is restored to within the preset temperature range, thereby reducing costs and improving temperature control efficiency.

[0041] Optionally, in the embodiment of the present application, the bending portion 21 bends downward along the first direction Y, and the lowest position of the bending portion 21 along the first direction Y is the bending point 211 , and the bending point 211 along the first direction Y is lower than the lowest position of the connection point 30 .

[0042] In the embodiment of the present application, the bending portion 21 is bent downward along the first direction Y to achieve that the lowest point of the bending portion 21 is lower than the lowest point of the connection point 30, and the other end of the bent wire 20 is connected to the control unit 70. It can be understood that the bending point 211 is lower than the lowest position of the connection point 30, so that the condensed water attached to the wire 20 can only gather to the lowest point of the wire 20, that is, the bending point 211, under the action of gravity, and because the bending point 211 is lower than the connection point 30, the condensed water will not flow to the connection point 30, but gather at the bending point 211, which has the beneficial effect of avoiding the risk of short circuit caused by the condensed water flowing to the connection point 30.

[0043] Furthermore, the bending point 211 is the lowest position of the bending portion 21 along the first direction Y, and the bending point 211 and the connection point 30 also have a preset interval along the second direction X. The preset interval is set to prevent condensed water attached to the bending portion 21 from splashing onto the connection point 30 when dripping, thereby reducing the risk of the connection point 30 being splashed by dripping condensed water and causing a short circuit.

[0044] In practical applications, the size of the preset interval can be determined according to actual conditions. Specifically, the size of the preset interval can be set according to conditions such as the layout position of each component in the battery pack 1, and this embodiment does not impose any limitation on this.

[0045] Optionally, in an embodiment of the present application, the battery pack 1 also includes a tray 40 arranged in the accommodating space 3, the tray 40 is connected to the box body 2, the heating film 10 is arranged on a side of the tray 40 facing the battery pack 80 along the first direction Y, the heating film 10 is connected to the battery pack along a side away from the tray 40 along the first direction Y, and the bending portion 21 is connected to the end of the tray.

[0046] In the embodiment of the present application, the support plate 40 is connected to the box body 2. The support plate 40 can be connected to the bottom of the box body 2, or it can be connected to the side walls on opposite sides of the box body 2 and have a certain interval with the bottom. This embodiment does not make any limitation on this, and it can be determined according to actual conditions. The setting of the support plate 40 is used to provide support for the battery pack 80 and also provide an attachment object for the heating film 10. The heating film 10 is attached to the support plate 40, and the heating film 10 is arranged on the side of the support plate 40 facing the battery pack 80 along the first direction X, that is, the heating film 10 is closer to the battery pack 80 than the support plate 40, and the side of the heating film 10 away from the support plate 40 along the first direction Y is connected to the battery pack 80. The battery pack 80 is arranged on the side of the heating film 10 away from the support plate 40. It can be understood that in actual applications, the battery pack 80 is in contact with the heating film 10 and also abuts against the support plate 40, and the battery pack 80 is heated during the heating process of the heating film 10. Furthermore, the bending portion 21 is connected to the end of the support plate 40, and the end of the support plate 40 is used to provide a fixed position for the bending portion 21. Since the battery pack 80 will be set at the position on the support plate 40 covering the heating film 10, considering the layout between the various components, the bending portion 21 is connected to the end of the support plate 40 to facilitate the arrangement of the wire 20 in the accommodating space 3. While the support plate 40 provides support for the battery pack 80, it also provides support for the bending portion 21. The shape of the bending portion 21 fixed to the end of the support plate 40 will be fixed, which has the beneficial effect of preventing the bending portion 21 from moving during use, resulting in changes in the height and spacing between the bending portion 21 and the connection point 30, and preventing condensation water from flowing or splashing to the connection point 30 and causing a short circuit.

[0047] It should be noted that the bending portion 21 can be fixedly connected to the end of the support plate 40, or can be detachably connected to the end of the support plate 40. The bending portion 21 can be fixed during the use of the battery pack 1. This embodiment does not impose any limitation on this.

[0048] Optionally, in an embodiment of the present application, the support plate 40 includes a main body portion 42 and a fixing portion 41 connected to the main body portion 42, the main body portion 42 is extended along the second direction X, the fixing portion 41 is arranged at the end of the main body portion 42, the fixing portion 41 is bent downward along the first direction Y, the bending portion 21 is connected to the fixing portion 41 and the fixing portion 41 is bent toward the side away from the battery pack 80.

[0049] In the embodiment of the present application, the main body 42 is used to carry the battery pack 80. Since the main body 42 is extended along the second direction X, it can be understood that at least one battery pack 80 disposed on the support plate 40 is also arranged in sequence along the second direction X. The fixing portion 41 is connected to the main body 42. The fixing portion 41 is used to provide a fixed position for the bending portion 21 on the support plate 40. Since the battery pack 80 is disposed at the position covering the heating film 10 on the support plate 40, considering the layout between the various components, the fixing portion 41 is disposed at the end of the support plate 40 to facilitate the arrangement of the wire 20 in the accommodating space 3, and further, it is also convenient for the connection between the fixing portion 41 and the support plate 40. While the main body 42 provides support for the battery pack 80, the fixing part 41 also provides support for the bending part 21. The shape of the bending part 21 fixed to the fixing part 41 will be fixed, which has the effect of preventing the bending part 21 from moving during use, causing the height and interval between the bending part 21 and the connection point 30 to change, and preventing condensed water from flowing or splashing to the connection point 30 to cause a short circuit. The fixing part 41 is arranged at the end of the main body 42 close to the bending part 21 to facilitate the arrangement of the wire 20 in the accommodating space 3. The setting of the fixing part 41 is used to provide a fixed position for the bending part 21. Further, the fixing part 41 is bent toward the side away from the battery pack 80. In actual application, the bending part 21 is bent downward along the first direction Y, and the fixing part 41 is bent toward the side away from the battery pack 80. It can be understood that the bending of the fixing part 41 makes the surface of the fixing part 41 consistent with the bending direction of the bending part 21, that is, the bending of the fixing part 41 achieves the profile matching with the bending part 21. Furthermore, when condensed water adheres to the wire 20 and flows with the wire 20, the condensed water will flow to the bending portion 21 under the action of gravity. As the amount of condensed water gradually increases and gathers at the lowest point of the bending portion 21 and drips to the fixing portion 41, the setting of the curved fixing portion 41 can make the condensed water flow downward naturally, which has the beneficial effect of preventing the condensed water from flowing to the connection point 30 and causing a short circuit.

[0050] Optionally, in an embodiment of the present application, a guide groove 411 is provided on one side of the fixing portion 41 facing the bending portion 21, and the guide groove 411 extends along the bending direction of the fixing portion 41 to the edge of the fixing portion 41 away from the main body portion 42; the guide groove 411 is recessed along the first direction Y in the direction away from the bending portion 21.

[0051] In the embodiment of the present application, the setting of the guide groove 411 is used to further guide the condensed water dripping on the fixed part 41. In practical applications, the guide groove 411 extends along the setting direction of the fixed part 41, and extends to the edge of the fixed part 41 away from the main body 42, so as to guide the condensed water to the edge away from the main body 42, and guide the condensed water to flow out of the fixed part 41, thereby preventing the condensed water from flowing in the direction close to the connection point 30. The guide groove 411 is concave along the first direction Y in the direction away from the bending part 21, and the concave guide groove 411 has a certain water storage space. When the dripping condensed water is small, it can flow out of the fixed part 41 drop by drop along the direction of the guide groove 411. When the dripping condensed water is large, it can be gathered into a water flow in the guide groove 411 and flow out of the fixed part 41 along the guide groove 411.

[0052] Optionally, in the embodiment of the present application, the battery pack 1 further includes a connector 60 , which is disposed at an end of the fixing portion 41 away from the battery pack 80 ; the bending portion 21 is connected to the fixing portion 41 via the connector 60 .

[0053] In the embodiment of the present application, the connection member 60 is configured to limit the bending portion 21. The bending portion 21 is overlapped with the fixing portion 41 through the second connecting portion to achieve the limitation and fixation of the connection member 60, thereby preventing the connection member 60 from shifting during the use of the battery pack, causing the relative position of the bending portion 21 and the lowest position of the connection point 30 to change, causing condensed water to contact the connection point 30 and cause a short circuit.

[0054] It should be noted that the connector 60 can be a buckle or a bolt and nut connector. Specifically, the buckle includes a first clamping portion and a second clamping portion, the first clamping portion is movably connected to the second clamping portion, the first clamping portion can be fixedly connected to the second clamping portion or fixedly connected to the fixed portion, and the buckle has a connected state and a separated state. In actual application, when the first clamping portion and the second clamping portion are in the separated state, the bending portion 21 is placed between the first clamping portion and the second clamping portion, and then the second clamping portion is movable to clamp with the second clamping portion to fix the bending portion 21. This embodiment does not make any limitation to this.

[0055] Optionally, in an embodiment of the present application, the battery pack 1 also includes multiple end plates 50, which are connected to the support plate 40, and two adjacent end plates 50 along the second direction X clamp the two ends of a group of battery packs 80; the bending portion 21 bypasses the side of the end plate 50 facing away from the battery pack 80 and is connected to the support plate 40.

[0056] In the embodiment of the present application, the end plate 50 is used to limit the battery pack 80. The end plate 50 is connected to the support plate 40. The end plate 50 is arranged at both ends of the support plate 40. The end plate 50 can also be arranged in the middle of the support plate 40. A group of battery packs 80 is sandwiched between two adjacent end plates 50 to limit the battery pack 80. The bending portion 21 is arranged on the side of the end plate 50 away from the battery pack 80. The end plate 50 has the effect of isolating the bending portion 21 from the battery pack 80, and has the beneficial effect of preventing the condensed water attached to the bending portion 21 from contacting the battery pack 80.

[0057] It should be noted that the end plate 50 is used to keep the installation position of the battery pack 80 fixed. In the battery pack 1, since the battery packs 80 need to be connected to each other, the battery packs 80 need to be fixed in a unified whole. The end plate 50 is a key component to ensure that the battery pack 80 can be correctly installed and fixed. Furthermore, the material of the end plate 50 is usually metal or plastic. According to the needs of different battery packs 80, some end plates 50 will also have some built-in wiring harnesses and connectors. However, whether it is an end plate 50 made of metal or plastic, the role of the end plate 50 in the battery pack 1 is generally the same.

[0058] It should also be noted that the end plate 50 can fix the battery pack 80 inside the battery pack 1 by combining accessories such as bolts, nuts, and gaskets. In this process, the battery pack 80 needs to be connected through the wiring harness in the battery pack 1 and connected to the battery management system. At the same time, the box 2 of the battery pack 1 can also be connected to the end plate 50. Therefore, the design, structure, and fixing method of the end plate 50 need to take into account the structure and performance characteristics of the entire battery pack 1. The setting of the end plate 50 can improve the reliability, safety, and service life of the battery pack 1.

[0059] Optionally, in the embodiment of the present application, the battery pack 1 has a third direction Z intersecting the first direction Y and the second direction X, a plurality of support plates 40 are arranged in sequence along the third direction Z, and a heating film 10 is provided on each support plate 40 .

[0060] In the embodiment of the present application, the battery pack 1 has a plurality of pallets 40, and the plurality of pallets 40 are provided to provide a placement position for more battery packs 80. Furthermore, a heating film 10 is provided on each pallet 40 to provide heat for the battery packs 80 placed on the pallet 40. In practical applications, in order to maximize the space utilization rate in the battery pack 1, the plurality of pallets 40 are arranged in sequence along the third direction Z, and the battery packs 80 arranged on adjacent pallets 40 are also arranged in sequence along the third direction Z. It can be understood that the plurality of battery packs 80 are arranged in an array along the second direction X and the third direction Z, which has the beneficial effect of increasing the energy density in the battery pack 1.

[0061] Optionally, in an embodiment of the present application, the battery pack 1 further includes a seal, the connection point 30 is located on a side of the heating film 10 close to the battery pack 80 , and the seal is wrapped around the connection point 30 .

[0062] In the embodiment of the present application, the connection point 30 is located on the side of the heating film 10 close to the battery pack 80. The seal is used to isolate the external environment from the connection point 30. The seal is wrapped around the connection to effectively prevent the connection point 30 from contacting condensed water. In practical applications, since the wire 20 is provided with a bend 21, and the lowest position of the bend 21 is lower than the lowest position of the connection point 30, under normal circumstances, condensed water will not flow to the connection point 30 with the wire 20. However, when the condensed water gathers and drips, there may be a situation where the condensed water splashes to the connection point 30. The seal wrapped around the periphery of the connection point 30 has the function of isolating the condensed water, thereby having the beneficial effect of preventing the condensed water from contacting the connection point 30 and causing a short circuit.

[0063] Furthermore, the seal is made of an insulating and water-proof material, and the seal may be a membrane structure, which is wrapped around the connection point 30. The seal may also be a structure with a certain rigidity, which is sleeved around the connection point 30 to seal the connection point 30. This embodiment does not limit the specific structure of the seal, and it only needs to have the function of isolating condensed water and the connection point 30. Optionally, in the embodiment of the present application, an electrical device is also provided, including the battery pack 1 as described above.

[0064] Specifically, the electrical equipment includes but is not limited to electric vehicles, hybrid vehicles, charging stations and some energy storage systems. The electrical equipment is equipped with a battery pack 1 as in any of the above embodiments. The two ends of the wire 20 in the battery pack 1 are respectively connected to the control unit 70 and the heating film 10. The control unit 70 heats the heating film 10 through the wire 20, thereby heating the surface of the battery in the battery pack 1. The wire 20 and the heating film 10 are connected by connection, and the connection between the wire 20 and the heating film 10 has a connection point 30. Among them, the wire 20 has a bending portion 21, and the setting of the bending portion 21 is used to prevent the condensed water attached to the wire 20 from flowing to the connection point 30 to cause a short circuit. Specifically, along the first direction Y, the lowest position of the bending portion 21 is lower than the lowest position of the connection point 30. It can be understood that the condensed water attached to the wire 20 flows downward due to gravity, and the lowest position of the bending portion 21 is lower than the connection point 30. Therefore, the condensed water attached to the wire 20 will naturally flow to the lowest point of the bending portion 21 instead of flowing to the connection point 30, which has the beneficial effect of avoiding the risk of short circuit caused by the condensed water flowing to the connection point 30, thereby improving the reliability of the electrical equipment.

[0065] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0066] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A battery pack (1), the battery pack (1) having a first direction (Y) and a second direction (X) intersecting each other, characterized in that: include: A box body (2), a heating film (10) and a wire (20), wherein a receiving space (3) is formed in the box body (2), and the heating film (10) and the wire (20) are arranged in the receiving space (3); The heating film (10) extends along the second direction (X) and is used to connect to the battery pack (80) in the accommodating space (3); one end of the wire (20) is connected to the heating film (10) to form a connection point (30); and the other end of the wire (20) is used to connect to the control unit (70) in the accommodating space (3); The conductive wire (20) comprises a bending portion (21), wherein the bending portion (21) is arranged at a position close to the connection point (30), and the lowest position of the bending portion (21) along the first direction (Y) is lower than the lowest position of the connection point (30).

2. The battery pack (1) according to claim 1, characterized in that: The bending portion (21) bends downward along the first direction (Y), the lowest position of the bending portion (21) along the first direction (Y) is a bending point (211), and the bending point (211) along the first direction (Y) is lower than the lowest position of the connection point (30).

3. The battery pack (1) according to claim 1, characterized in that: The battery pack (1) further comprises a support plate (40) arranged in the accommodating space (3), the support plate (40) being connected to the box body (2), the heating film (10) being arranged on a side of the support plate (40) facing the battery pack (80) along the first direction (Y), the heating film (10) being connected to the battery pack (80) along a side of the support plate (40) facing away from the support plate (40) along the first direction (Y), and the bending portion (21) being connected to an end of the support plate (40).

4. The battery pack (1) according to claim 3, characterized in that: The support plate (40) comprises a main body (42) and a fixing portion (41) connected to the main body (42); the main body (42) is extended along the second direction (X), and the fixing portion (41) is arranged at the end of the main body (42); the fixing portion (41) is bent downward along the first direction (Y), and the bent portion (21) is connected to the fixing portion (41).

5. The battery pack (1) according to claim 4, characterized in that: A guide groove (411) is provided on one side of the fixing portion (41) facing the bending portion (21); the guide groove (411) extends along the bending direction of the fixing portion (41) to an edge of the fixing portion (41) away from the main body portion (42); and the guide groove (411) is recessed along the first direction (Y) in a direction away from the bending portion (21).

6. The battery pack (1) according to claim 4, characterized in that: The battery pack (1) further comprises a connecting member (60), wherein the connecting member (60) is arranged on a side of the fixing portion (41) close to the battery pack (80); The bending portion (21) is connected to the fixing portion (41) via the connecting member (60).

7. The battery pack (1) according to claim 3, characterized in that: The battery pack (1) further comprises a plurality of end plates (50), wherein the end plates (50) are connected to the support plate (40), and two adjacent end plates (50) along the second direction (X) clamp a group of the battery packs (80); The bent portion (21) bypasses a side of the end plate (50) facing away from the battery pack (80) and is connected to the support plate (40).

8. The battery pack (1) according to claim 3, characterized in that: The battery pack (1) has a third direction (Z) intersecting the first direction (Y) and the second direction (X), a plurality of the support plates (40) are arranged in sequence along the third direction (Z), and each of the support plates (40) is provided with the heating film (10).

9. The battery pack (1) according to claim 1, characterized in that: The battery pack (1) further comprises a sealing member, the connection point (30) is located on a side of the heating film (10) close to the battery pack (80), and the sealing member is wrapped around the connection point (30).

10. An electrical device, characterized in that: Comprising a battery pack (1) as claimed in any one of claims 1 to 9.

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