Battery module

Abstract

The utility model provides a battery module, which belongs to the technical field of batteries and comprises an energy storage module, a heating sheet and a fixing belt, the energy storage module comprises a plurality of energy storage batteries which are arranged; the heating sheet is attached to the outer surface of the energy storage module and used for heating and heat preservation of the energy storage module. The fixing band tightly surrounds the peripheries of the energy storage module and the heating sheet and is used for tightly attaching the heating sheet to the outer surface of the energy storage module. According to the utility model, the fixing band tightly surrounds the peripheries of the energy storage module and the heating sheet, the fixing band not only enables a plurality of energy storage batteries to be tightly arranged, but also enables the heating sheet to be limited and tightly attached to the outer surface of the energy storage module, and the heating sheet is fixed by means of the fixing band, so that the heating sheet is ensured to be firmly fixed and prevented from falling off.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and more specifically, relates to a battery module. Background Art

[0002] Currently, lithium-ion battery modules have been widely used in power battery systems or household energy storage systems. However, in low temperature environments, the charging and discharging performance of battery modules is greatly limited. In order to improve the charging and discharging performance of lithium-ion battery modules in low temperature environments, they need to be heated. Heating plates are widely used because of their advantages such as small space occupation, uniform heating, high thermal conductivity, and low cost.

[0003] In the prior art, the heating sheet is attached to the outer surface of the battery module. The end of the heating sheet is connected to other power supply devices through wires to provide energy for the heating sheet. Since the end of the heating sheet is equipped with wires and resistance wires, the end of the heating sheet is easily lifted up due to the stress of the wires after installation, causing the heating sheet to easily fall off the battery module; and after the heating sheet is detached from the attached battery module, the heat cannot be transferred quickly, and its own temperature rises rapidly, resulting in dry burning or even spontaneous combustion, bringing serious consequences. Utility Model Content

[0004] The utility model aims to provide a battery module, aiming to solve the technical problem in the prior art that the heating plate is not firmly fixed and is easily separated from the battery module.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a battery module, including:

[0006] Energy storage module; the energy storage module includes a plurality of energy storage batteries arranged in an array;

[0007] A heating sheet is attached to the outer surface of the energy storage module and is used to heat and keep the energy storage module warm; and

[0008] The fixing belt is tightly wrapped around the outer circumference of the energy storage module and the heating plate, and is used to make the heating plate close to the outer surface of the energy storage module.

[0009] In a possible implementation, two groups of fixing belts are provided, which are respectively arranged in a ring shape around the outer circumference of the energy storage module and the heating plate, and are respectively closely attached to the two side edges of the heating plate.

[0010] In some embodiments, the two groups of fixing belts are also respectively close to the two end edges of the outer periphery of the energy storage module;

[0011] The heating plate comprises:

[0012] two fixing parts, respectively corresponding to the two groups of fixing belts, and respectively pressed and fitted on the outer surface of the energy storage module by the two groups of fixing belts; and

[0013] The heating part is connected between the two fixing parts.

[0014] In a possible implementation, the energy storage module is a hexahedral structure having two oppositely disposed end faces and two oppositely disposed side faces;

[0015] The heating plates are provided with two groups, the two groups of heating plates are electrically connected, and the two groups of heating plates are respectively attached to the two side surfaces.

[0016] In some embodiments, two ends of the heating plate extend to two end edges of the energy storage module respectively, and at least one end of the heating plate protrudes outward from the energy storage module.

[0017] In some embodiments, the battery module further comprises:

[0018] Two sets of end covers are fixedly arranged on the two end surfaces respectively;

[0019] The two groups of end covers and the two groups of heating plates are arranged around the outer circumference of the battery module, and the fixing belts are tightly surrounded by the outer circumferences of the two groups of end covers and the two groups of heating plates.

[0020] In some embodiments, the fixing belt and the end cover are further connected via a fastener.

[0021] In some embodiments, the fastener is inserted in a direction parallel to the end surface.

[0022] In some embodiments, the heating plate is also bonded to the outer surface of the energy storage module.

[0023] The beneficial effect of the battery module provided by the utility model is that: compared with the prior art, in the battery module of the utility model, the fixing belt tightly surrounds the outer circumference of the energy storage module and the heating plate. The fixing belt not only arranges multiple energy storage batteries tightly, but also limits the heating plate to be tightly attached to the outer surface of the energy storage module. The heating plate is fixed by means of the fixing belt, thereby ensuring that the heating plate is firmly fixed and prevented from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a battery module provided by an embodiment of the utility model;

[0026] Figure 2 A schematic diagram of the structure of a heating plate of a battery module provided in an embodiment of the utility model;

[0027] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at the center circle A.

[0028] In the figure: 1. energy storage module; 11. energy storage battery; 2. heating plate; 21. fixing part; 22. heating part; 3. fixing belt; 4. end cover; 5. fastener. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] See also Figure 1 The battery module provided by the utility model is now described. The battery module includes an energy storage module 1, a heating sheet 2 and a fixing belt 3. The heating sheet 2 is attached to the outer surface of the energy storage module 1 to heat and keep the energy storage module 1 warm; the fixing belt 3 is tightly wrapped around the outer periphery of the energy storage module 1 and the heating sheet 2 to attach the heating sheet 2 to the outer surface of the energy storage module 1.

[0031] The energy storage module 1 includes a plurality of energy storage batteries 11 arranged in an array. Since only mounting covers are provided between the two ends of the plurality of energy storage batteries 11, in order to increase the connection between the plurality of energy storage batteries 11 and ensure the stability of the energy storage module 1, a fixing belt 3 is tightly sleeved on the outer circumference of the plurality of energy storage batteries 11.

[0032] It should be noted that the arrangement of the above-mentioned multiple energy storage batteries 11 can be arranged side by side, in parallel, or in a rectangular array. The energy storage battery 11 is generally a hexahedral structure, and the energy storage module 1 formed by the arrangement of multiple energy storage batteries 11 is also preferably a hexahedral structure. The above-mentioned installation cover is generally buckled between the multiple energy storage batteries 11, and the installation cover is buckled on two sides of the energy storage module, and the fixing belt 3 is surrounded by the other four sides of the energy storage module 1.

[0033] The fixing belt 3 is a belt-shaped structure with a certain width and is made of a rigid material. The width of the fixing belt 3 is not limited to a specific value and can be determined according to the rigidity of the fixing belt 3 and the number of energy storage batteries 11 required to withstand the expansion force. The rigid material can be a metal material or an alloy material, etc. The fixing belt 3 can also be woven from a hard material such as nylon, and the woven structure has both rigidity and toughness.

[0034] The heating plate 2 adopts an electric heating method, and the end of the heating plate 2 is connected to other power supply equipment through a wire to provide energy for the heating plate 2. Preferably, the heating plate 2 itself is also bonded to the outer surface of the energy storage module 1; the specific heating method and heating principle of the heating plate 2 to the energy storage module 1 belong to conventional technology and will not be repeated here.

[0035] Compared with the prior art, the battery module provided by the utility model has a fixing belt 3 tightly surrounding the periphery of the energy storage module 1 and the heating plate 2. The fixing belt 3 not only closely arranges the multiple energy storage batteries 11, but also limits the heating plate 2 to be tightly attached to the outer surface of the energy storage module 1. The heating plate 2 is fixed by means of the fixing belt 3, thereby ensuring that the heating plate 2 is firmly fixed and prevented from falling off.

[0036] In some embodiments, the fixing position of the fixing belt 3 can be as follows: Figure 1 The structure shown, see Figure 1 There are two groups of fixing belts 3, which are respectively arranged in a ring shape around the outer periphery of the energy storage module 1 and the heating plate 2, and are respectively close to the two side edges of the heating plate 2.

[0037] Providing two sets of fixing belts 3 can increase the sleeve area between multiple energy storage batteries 11, and further increase the overall stability of the energy storage module 1; in addition, the two sets of fixing belts 3 are respectively attached to the two side edges of the heating plate 2, and the heating plate 2 is pressed from the two side edge positions, which can prevent the side edges of the heating plate 2 from warping and affecting the fixing belts 3 and the heating effect.

[0038] See also Figure 1 and Figure 2 On the basis of the above embodiment, the two sets of fixing belts 3 are also close to the edges of both ends of the outer periphery of the energy storage module 1. The heating plate 2 includes two fixing parts 21 and a heating part 22. The two fixing parts 21 correspond to the two sets of fixing belts 3 respectively, and are pressed and fitted to the outer surface of the energy storage module 1 by the two sets of fixing belts 3 respectively; the heating part 22 is connected between the two fixing parts 21.

[0039] A resistance wire is provided inside the heating part 22, and the end of the heating part 22 is connected to other power supply devices through a wire. Since the fixing part 21 is pressed by the fixing belt 3, the resistance wire may not be provided on the fixing part 21, and the fixing part 21 only serves to connect and fix, which can reduce the cost of the heating sheet 2 and facilitate the installation of the fixing belt 3.

[0040] Since the heating portion 22 has a resistance wire inside, the thickness of the heating portion 22 is greater than the thickness of the fixing portion 21 .

[0041] The two groups of fixing belts 3 are respectively close to the two end edges of the outer periphery of the energy storage module 1 , that is, the interval between the two groups of fixing belts 3 is relatively large, which can correspondingly increase the area of ​​the heating part 22 and ensure that the energy storage module 1 is heated evenly as a whole.

[0042] In some embodiments, the energy storage module 1 may be configured as follows: Figure 1 In the structure shown, the energy storage module 1 is a hexahedral structure having two oppositely disposed end faces and two oppositely disposed side faces; two groups of heating plates 2 are provided, the two groups of heating plates 2 are electrically connected by wires, and the two groups of heating plates 2 are respectively attached to the two side faces.

[0043] Since the energy storage battery 11 is a hexahedron structure, preferably, the energy storage module 1 composed of a plurality of arranged energy storage batteries 11 is also a hexahedron structure. In this embodiment, the two side faces and two end faces of the energy storage module 1 are defined to illustrate the placement position of the heating plate 2.

[0044] If multiple energy storage batteries 11 are arranged side by side or in parallel, the two end faces are perpendicular to the parallel or parallel direction. If multiple energy storage batteries 11 are distributed in a rectangular array, in the length and width direction of the rectangular array, the end faces are perpendicular to the length direction of the energy storage module 1, and the side faces are perpendicular to the width direction of the energy storage module 1.

[0045] There are two groups of heating sheets 2 , which are respectively attached to two side surfaces, so that the heating sheets 2 can cover each energy storage battery 11 , further improving the overall heating uniformity of the energy storage module 1 .

[0046] Preferably, the back side of the heating plate 2 is also bonded to the side surface of the energy storage module 1 .

[0047] See also Figure 1 On the basis of the above embodiment, both ends of the heating plate 2 extend to both end edges of the energy storage module 1 respectively, and at least one end of the heating plate 2 protrudes outward from the energy storage module 1.

[0048] Both ends of the heating plate 2 extend to the two end edges of the energy storage module 1 respectively, that is, the heating plate 2 can also completely cover the two energy storage batteries 11 located at the two ends, so that the temperature of the two energy storage batteries 11 located at the two ends is consistent with that of other energy storage batteries 11, further ensuring the temperature uniformity of the energy storage module 1.

[0049] At least one end of the heating plate 2 protrudes outward, and the protruding portion is used to connect a wire to avoid interference between the arrangement position of the wire and the energy storage module 1.

[0050] In some embodiments, the battery module can also be used as follows Figure 1 The structure shown, see Figure 1 The battery module further includes two sets of end caps 4. The two sets of end caps 4 are fixedly arranged on two end surfaces respectively; wherein the two sets of end caps 4 and the two sets of heating plates 2 are arranged around the outer circumference of the battery module, and the fixing belt 3 is tightly surrounded by the outer periphery of the two sets of end caps 4 and the two sets of heating plates 2.

[0051] Specifically, a connecting plate extends out from the end of the energy storage module 1, and the connecting plate is located on the periphery of the end cover 4, and the connecting plate and the end cover 4 are fixedly connected by bolts. Since the end of the heating plate 2 is to be connected to the wire, in order to avoid the shaking of the wire, a dodge groove for dodge the wire, and a hook located in the dodge groove and fixing the wire can also be provided on the end cover 4. In addition, in order to reduce the weight of the end cover 4, a plurality of weight-reducing grooves can be provided on the inner side of the end cover 4.

[0052] The end cap 4 is used to connect with other mounting brackets so that the battery module can be installed at the application site and the whole assembly is fixed. Preferably, the end cap 4 can be fixed on the mounting bracket by means of threaded connectors, snap-fit ​​structures, clamping structures or magnetic structures.

[0053] In some embodiments, the end cap 4 and the fixing belt 3 may be connected by Figure 1 and Figure 3 The structure shown, see Figure 1 and Figure 3 The fixing belt 3 and the end cover 4 are also connected by a fastener 5.

[0054] Since the fixing band 3 is an annular structure, it is directly sleeved on the periphery of the heating plate 2 and the end cover 4. Generally, the fixing band 3 is in a tightened state. By adding a fastener 5 between the fixing band 3 and the end cover 4, on the one hand, it can be ensured that the fixing band 3 will not change its position, that is, it will not separate from the fixing portion 21 of the heating plate 2. On the other hand, if the inner diameter of the selected fixing band 3 is slightly larger than the outer diameter formed by the two groups of heating plates 2 and the two groups of end covers 4, since the inner diameter of the fixing band 3 is not adjustable (that is, the circumference of the fixing band 3 is not adjustable), the fixing band 3 may become loose. After adding the fastener 5 to the fixing band 3, the fastener 5 can also press the fixing band 3 inwardly to adjust the tension of the fixing band 3, thereby ensuring that the fixing band 3 is pressed tightly against the two groups of heating plates 2 and the two groups of end covers 4.

[0055] See also Figure 1 and Figure 3 On the basis of the above-mentioned embodiment, the fastener 5 is penetrated on the side surface of the end cover 4, that is, the penetration direction of the fastener 5 is parallel to the end surface.

[0056] Since the end surface of the end cover 4 is also connected to other mounting brackets, the fastener 5 is arranged on the side of the end cover 4 to avoid interference with the connection position of the mounting bracket.

[0057] It should be noted that each set of fixing belts 3 is connected to two side surfaces of each end cover 4 via the above-mentioned fasteners 5 , that is, the battery module has eight fasteners 5 in total.

[0058] In order to simplify the assembly operation of the fastener 5, preferably, the fastener 5 is a rivet.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery module, characterized in that: include: Energy storage module (1); the energy storage module (1) comprises a plurality of energy storage batteries (11) arranged in an array; A heating plate (2) is arranged on the outer surface of the energy storage module (1) and is used to heat and keep the energy storage module (1) warm; as well as A fixing belt (3) is tightly wrapped around the outer circumference of the energy storage module (1) and the heating plate (2) and is used to hold the heating plate (2) tightly against the outer surface of the energy storage module (1).

2. The battery module according to claim 1, characterized in that: The fixing belts (3) are provided with two groups, which are respectively arranged in a ring shape around the outer periphery of the energy storage module (1) and the heating plate (2), and are respectively closely attached to the two side edges of the heating plate (2).

3. The battery module according to claim 2, characterized in that: The two groups of fixing belts (3) are also respectively close to the edges of both ends of the outer periphery of the energy storage module (1); The heating plate (2) comprises: Two fixing portions (21), respectively corresponding to the two groups of fixing belts (3), and respectively pressed and fitted on the outer surface of the energy storage module (1) by the two groups of fixing belts (3); and The heating part (22) is connected between the two fixing parts (21).

4. The battery module according to any one of claims 1 to 3, characterized in that: The energy storage module (1) is a hexahedral structure having two oppositely disposed end faces and two oppositely disposed side faces; The heating plates (2) are provided with two groups, the two groups of heating plates (2) are electrically connected, and the two groups of heating plates (2) are respectively attached to the two side surfaces.

5. The battery module according to claim 4, characterized in that: The two ends of the heating plate (2) extend to the two end edges of the energy storage module (1) respectively, and at least one end of the heating plate (2) protrudes outward from the energy storage module (1).

6. The battery module according to claim 4, characterized in that: The battery module also includes: Two groups of end covers (4) are respectively fixedly arranged on the two end surfaces; The two groups of end covers (4) and the two groups of heating plates (2) are arranged around the outer peripheral surface of the energy storage module (1), and the fixing belt (3) is tightly surrounded by the two groups of end covers (4) and the two groups of heating plates (2).

7. The battery module according to claim 6, characterized in that: The fixing belt (3) and the end cover (4) are also connected via a fastener (5).

8. The battery module according to claim 7, characterized in that: The penetration direction of the fastener (5) is parallel to the end surface.

9. The battery module according to claim 1, characterized in that: The heating plate (2) is also bonded to the outer surface of the energy storage module (1).

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