Heating assembly and battery module

Abstract

The utility model provides a heating assembly and a battery module, and belongs to the technical field of batteries, the heating assembly comprises a plurality of electric heating sheets, a connecting piece and a tearable piece, the plurality of electric heating sheets are sequentially arranged along a first direction, and a first area and a second area are divided between two adjacent electric heating sheets along a second direction; the connecting pieces are arranged in the first area, the two adjacent electric heating pieces are electrically connected through the connecting pieces, and the connecting pieces have extensibility; the tearable part is arranged in the second area, and the two adjacent electric heating pieces located in the second area are detachably connected through the tearable part. Through the arrangement of the extendable connecting piece and the tearable piece, when the distance between the adjacent electric heating pieces needs to be increased, the tearable piece can be torn off, and the connecting piece is extended, so that the overall size of the heating assembly can be changed, the practicability of the heating assembly is improved, and when the size of the module is changed, the electric heating pieces can be conveniently detached. And a new heating assembly does not need to be arranged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a heating component and a battery module. Background Art

[0002] Currently, batteries have been widely used in power battery systems or household energy storage systems. In low temperature environments, the charging and discharging performance of batteries is greatly limited. In order to improve the charging and discharging performance of batteries in low temperature environments, they need to be heated. Currently, commonly used heating methods include water heater heating, PTC heating sheet heating, silicone heating sheet heating and polyimide heating sheet heating.

[0003] Among them, polyimide heating plates are widely used due to their advantages such as small space occupation, uniform heat generation, high thermal conductivity and low cost. At present, the size of the heating plate is designed according to the module size and is unique. For example, when the battery cell gap of the module is changed, the module size changes and the corresponding heating plate needs to be redesigned, which increases the cost. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that the size of the heating plate is designed according to the size of the module and is unique. When the cell gap of the module is changed, the corresponding heating plate needs to be redesigned, which increases the cost, thereby providing a heating component and a battery module.

[0005] In order to solve the above technical problems, the utility model provides a heating component, including:

[0006] A plurality of electric heating plates, wherein the plurality of electric heating plates are arranged in sequence along a first direction, and the area between two adjacent electric heating plates is divided into a first area and a second area along a second direction;

[0007] A connecting member, arranged in the first region, electrically connecting two adjacent electric heating plates through the connecting member, and the connecting member is stretchable;

[0008] A tearable piece is arranged in the second area, and two adjacent electric heating plates located in the second area are detachably connected through the tearable piece.

[0009] Optionally, the electric heating plate includes a base film layer, a covering film layer and a heating wire sandwiched between the base film layer and the covering film layer.

[0010] Optionally, the connecting member includes a connecting base film layer, a connecting covering film layer and a connecting heating wire sandwiched between the connecting base film layer and the connecting covering film layer, and the connecting heating wire in the connecting member is connected to the heating wire in the electric heating plate.

[0011] Optionally, the connecting piece and the plurality of electric heating plates are an integrally formed structure.

[0012] Optionally, the connecting member is a connecting wire, and the connecting wire is connected to the heating wire in the electric heating plate.

[0013] Optionally, the connecting piece is one or more of a Z-shaped structure, an S-shaped structure, and an arc-shaped structure.

[0014] Optionally, the connecting member includes two ends and a non-end located between the two ends, the two ends are fixedly connected to the electric heating plate, and the part of the non-end opposite to the electric heating plate is connected to the electric heating plate through a tear line.

[0015] Optionally, the tearable piece is a tear line or a tear groove.

[0016] Optionally, it further comprises: a power supply wire, one end of which is connected to any one of the electric heating plates or the connecting piece, and the other end of which is connected to a wiring terminal.

[0017] The utility model also provides a battery module, comprising a plurality of battery cells arranged along a first direction and a heating assembly as described above, wherein the electric heating plates in the heating assembly correspond to the battery cells one by one, and the electric heating plates are suitable for heating the battery cells.

[0018] The technical solution of the utility model has the following advantages:

[0019] The heating assembly provided by the utility model comprises a plurality of electric heating plates, a connecting piece and a tearable piece. Two adjacent electric heating plates are divided into a first area and a second area. The connecting piece is arranged in the first area, and the two adjacent electric heating plates are electrically connected by the connecting piece, and the connecting piece is stretchable; the tearable piece is arranged in the second area, and the two adjacent electric heating plates located in the second area are detachably connected by the tearable piece.

[0020] By setting up the stretchable connecting piece and the tearable piece, when it is necessary to increase the distance between adjacent electric heating plates, the tearable piece can be torn apart and the connecting piece can be stretched, so that the overall size of the heating component can be changed, thereby improving the practicality of the heating component. When the module size changes, there is no need to set up a new heating component, thereby reducing the cost. In addition, with the setting of the first area and the second area, the tearable piece and the connecting piece are both set between two adjacent electric heating plates, and the structure is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a structural schematic diagram of an implementation mode of the heating component provided in Example 1 of the utility model;

[0023] Figure 2 for Figure 1 A cross-sectional schematic diagram of

[0024] Figure 3 Figure 1 Schematic diagram of the internal connection structure;

[0025] Figure 4 for Figure 1 A schematic diagram of a structure in which two adjacent electric heating plates and a connecting piece are separated;

[0026] Figure 5 for Figure 1 Schematic diagram of the gap change state between adjacent electric heating elements;

[0027] Figure 6 This is a schematic structural diagram of an implementation of a battery module provided in Example 2 of the utility model.

[0028] Description of reference numerals:

[0029] 1. Electric heating plate; 2. First area; 3. Second area; 4. Connector; 5. Tearable part; 6. Base film layer; 7. Covering film layer; 8. Heating wire; 9. End; 10. Non-end; 11. Power supply wire; 12. Wiring terminal; 13. Mounting slot; 14. Battery cell. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1

[0035] The heating assembly provided in this embodiment is arranged in the battery module and is used to heat the battery cell.

[0036] like Figures 1 to 5 As shown, a specific implementation of the heating component provided in this embodiment includes a plurality of electric heating plates 1, a connecting piece 4 and a tearable piece 5. The plurality of electric heating plates 1 are arranged in sequence along a first direction, and two adjacent electric heating plates 1 are divided into a first area 2 and a second area 3 along a second direction; the connecting piece 4 is arranged in the first area 2, and the two adjacent electric heating plates 1 are electrically connected by the connecting piece 4, and the connecting piece 4 is stretchable; the tearable piece 5 is arranged in the second area 3, and the two adjacent electric heating plates 1 located in the second area 3 are detachably connected by the tearable piece 5. It should be noted that the first direction is the width direction of the electric heating plate 1 (i.e. Figure 1 The second direction refers to the length direction of the side where two adjacent electric heating plates 1 are connected, that is, Figure 1 The width direction of the heating component (i.e. Figure 1 up and down directions in the image).

[0037] By setting the stretchable connecting piece 4 and the tearable piece 5, when it is necessary to increase the distance between adjacent electric heating plates 1, the tearable piece 5 can be torn apart and the connecting piece 4 can be stretched, so that the overall size of the heating component can be changed, thereby improving the practicality of the heating component. When the module size changes, there is no need to set up a new heating component, thereby reducing costs. The setting of the tearable piece 5 also makes the electric heating plates 1 in the initial state have a certain stability; and the first area 2 and the second area 3 are set, and the tearable piece 5 and the connecting piece 4 are both set between two adjacent electric heating plates 1, so that the structure is more compact.

[0038] Specifically, the electric heating plate 1 is a rectangular structure, and a mounting groove 13 is provided at the electric heating plate 1 located in the first area 2. The mounting groove 13 is used to accommodate the connector 4, so that the overall structure of the heating assembly is a rectangular structure with a compact structure.

[0039] The positions and numbers of the second area 3 and the first area 2 are not limited. In one embodiment, the first area 2 and the second area 3 each have one, and are arranged in sequence, that is, one tearable piece 5 is provided. In addition, as an alternative embodiment, the first area 2 has one, and the second area 3 has two, and the two second areas 3 are respectively arranged on both sides of the first area 2, that is, the number of tearable pieces 5 is selected according to the position of the connecting piece 4.

[0040] like Figure 2 As shown, in the heating assembly provided in this embodiment, the electric heating plate 1 includes a base film layer 6, a coating layer 7 and a heating wire 8 sandwiched between the base film layer 6 and the coating layer 7.

[0041] Specifically, the heating wire 8 is hot-pressed between the base film layer 6 and the coating layer 7 by etching, and the base film layer 6 and the coating layer 7 are made of insulating materials.

[0042] like Figure 3 As shown, a specific implementation of the heating wire 8, the heating wire 8 is coiled between the base film layer 6 and the coating layer 7, and the coiling method is not specifically limited as long as a larger heating area is maintained.

[0043] like Figure 3 As shown, in the heating assembly provided in this embodiment, the connecting member 4 has the same structure as the electric heating plate 1, and the connecting member 4 includes a connecting base film layer, a connecting coating layer, and a connecting heating wire sandwiched between the connecting base film layer and the connecting coating layer. The connecting heating wire in the connecting member 4 is connected to the heating wire 8 in the electric heating plate 1. Figure 3 The internal integral connection of the heating assembly refers to the interconnected heating wires. The connector 4 not only plays a connecting role, but also can generate heat.

[0044] The heating assembly provided in this embodiment is an integrally formed structure of the connector 4 and the plurality of electric heating plates 1, that is, the connecting heating wire of the connector 4 and the heating wire 8 of the electric heating plate 1 are integrally formed, and the connecting base film layer and the connecting coating layer of the connector 4 are also integrally formed with the base film layer 6 and the coating layer 7 of the electric heating plate 1. The integrally formed method is simple and convenient to manufacture. Specifically, the heating wires 8 of all the electric heating plates 1 and the connecting heating wires of the connector 4 are directly formed on the foil by an etching process, and then the base film layer and the coating layer on both sides are integrally coated. When coating the base film layer and the coating layer, the connector 4 can be directly coated, or it can be coated to form an integral structure, and then cut at the first area 2 to form the connector 4.

[0045] In another embodiment, the connecting member 4 is a connecting wire, and the connecting wire is connected to the heating wire in the electric heating plate 1 .

[0046] In the heating assembly provided in this embodiment, the connecting member 4 is one or more of a Z-shaped structure, an S-shaped structure, and an arc-shaped structure, and may also be other structures in the prior art that can produce stretching deformation.

[0047] The connecting member 4 is a specific embodiment of a Z-shaped structure, such as Figure 5 In (a), the connector 4 is in the initial state. Figure 5 As shown in (b), the connector 4 is shown after the gap between two adjacent electric heating plates 1 is changed. After the connector 4 is stretched, the middle part thereof will be lifted up, and the lifted part will not affect the normal installation of the heating assembly.

[0048] like Figure 5 As shown, the short dotted line in the figure represents the tear line, and the cross-filled part in the figure represents the connector 4. The heating assembly provided in this embodiment includes two end portions 9 and a non-end portion 10 located between the two end portions 9. The two end portions 9 are fixedly connected to the electric heating plate 1, and the portion of the non-end portion 10 opposite to the electric heating plate 1 is connected to the electric heating plate 1 through a tear line. By setting the tear line between the non-end portion 10 and the electric heating plate 1, the connector 4 is in a fixed state in the initial state, so as to prevent the connector 4 from shaking and being unstable.

[0049] In the heating assembly provided in this embodiment, the tearable piece 5 is a tear line or a tear groove. Specifically, the tearable piece 5 is arranged along a straight line. In addition, as an alternative embodiment, the tearable piece 5 can also be arranged along a structure such as a wavy line or a fold line.

[0050] like Figure 1As shown, the heating assembly provided in this embodiment further includes: a power supply wire 11, one end of which is connected to any of the electric heating plates 1 or the connecting member 4, and the other end of which is connected to a wiring terminal 12. The power supply end supplies power to the electric heating plate 1 through the wiring terminal 12 and the power supply wire 11 to heat the battery cell. Specifically, the power supply wire 11 is connected to the outermost electric heating plate 1.

[0051] Adjustment process of the heating component: when the gap between the first battery cell and the second battery cell of the module changes, the first battery cell corresponds to the first electric heating plate, and the second battery cell corresponds to the second electric heating plate. The two located in the second area 3 are separated by breaking the tearable piece 5 between the first electric heating plate and the second electric heating plate. As the distance between the first electric heating plate and the second electric heating plate increases, the corresponding connecting piece 4 stretches to adapt to the distance between the two.

[0052] Example 2

[0053] like Figure 6 As shown, a specific implementation of the battery module provided in this embodiment includes a plurality of battery cells 14 arranged along a first direction and the heating assembly described in Example 1, the electric heating sheet 1 in the heating assembly corresponds to the battery cells 14 one by one, and the electric heating sheet 1 is suitable for heating the battery cells 14. Specifically, the electric heating sheet 1 and the battery cells 14 can be connected by bonding, and the electric heating sheet 1 can be fixed on the side of the battery cell 14, or on its bottom surface.

[0054] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. A heating component, characterized in that: include: A plurality of electric heating plates (1), wherein the plurality of electric heating plates (1) are arranged in sequence along a first direction, and a region between two adjacent electric heating plates (1) is divided into a first region (2) and a second region (3) along a second direction; A connecting member (4) is arranged in the first region (2), and two adjacent electric heating plates (1) are electrically connected via the connecting member (4), and the connecting member (4) is stretchable; A tearable piece (5) is arranged in the second area (3), and two adjacent electric heating sheets (1) located in the second area (3) are detachably connected via the tearable piece (5).

2. The heating assembly according to claim 1, characterized in that The electric heating plate (1) comprises a base film layer (6), a coating layer (7), and a heating wire (8) sandwiched between the base film layer (6) and the coating layer (7).

3. The heating assembly according to claim 2, characterized in that The connecting member (4) comprises a connecting base film layer, a connecting coating layer and a connecting heating wire sandwiched between the connecting base film layer and the connecting coating layer, and the connecting heating wire in the connecting member (4) is connected to the heating wire in the electric heating plate (1).

4. The heating assembly according to claim 3, characterized in that The connecting piece (4) and the plurality of electric heating plates (1) are an integrally formed structure.

5. The heating assembly according to claim 2, characterized in that: The connecting piece (4) is a connecting wire, and the connecting wire is connected to the heating wire in the electric heating plate (1).

6. The heating assembly according to claim 1, characterized in that The connecting piece (4) is one or more of a Z-shaped structure, an S-shaped structure, and an arc-shaped structure.

7. The heating assembly according to claim 6, characterized in that The connecting member (4) comprises two end portions (9) and a non-end portion (10) located between the two end portions (9); the two end portions (9) are fixedly connected to the electric heating plate (1); and a portion of the non-end portion (10) opposite to the electric heating plate (1) is connected to the electric heating plate (1) via a tear line.

8. The heating assembly according to claim 1, characterized in that The tearable piece (5) is a tear line or a tear groove.

9. The heating assembly according to claim 1, characterized in that: Also includes: A power supply wire (11), one end of which is connected to any one of the electric heating plates (1) or the connecting piece (4), and the other end of which is connected to a wiring terminal (12).

10. A battery module, characterized in that: The invention comprises a plurality of battery cells (14) arranged along a first direction and a heating component according to any one of claims 1 to 9, wherein the electric heating plate (1) in the heating component corresponds to the battery cells (14) one by one, and the electric heating plate (1) is suitable for heating the battery cells (14).

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