Battery module

Abstract

The utility model discloses a battery module which comprises a battery assembly and a wire harness, the battery assembly comprises a shell assembly, an anti-explosion valve and an aluminum row, the shell assembly is provided with a first surface and a second surface which are adjacent to each other, the anti-explosion valve and the aluminum row are arranged on the first surface, the wire harness is connected with the second surface, and the wire harness is electrically connected with the aluminum row. The battery module disclosed by the utility model solves the technical problem that the battery module is easy to fire due to thermal runaway.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery module. BACKGROUND

[0002] At present, the battery module plays a vital role in the battery pack, especially in the process of installation, connection and heat dissipation of the battery pack. The traditional battery module structure mainly relies on a simple connection mode, and a single adhesive material is usually used to fix the components. However, with the continuous progress of battery technology, higher requirements are put forward for the structural stability, reliability and safety of the battery module. The battery module in the prior art is prone to damage the wire harness due to the high-temperature gas sprayed by the explosion-proof valve during thermal runaway, resulting in short circuit and fire of the battery module. SUMMARY

[0003] One object of the utility model is to provide a battery module, which aims to solve the technical problem of easy fire of the battery module during thermal runaway.

[0004] To achieve the above object, the utility model provides a scheme: a battery module, characterized by comprising: a battery component and a wire harness, the battery component comprising a shell component, an explosion-proof valve and an aluminum bar, the shell component having adjacent first and second surfaces, the explosion-proof valve and the aluminum bar being arranged on the first surface, the wire harness being connected to the second surface, and the wire harness and the aluminum bar being electrically connected.

[0005] Optionally, the battery module comprises a protective film, the protective film comprising a first part and a second part, the first part being arranged on the first surface, and the second part being connected to the first part and arranged on the second surface, the wire harness being connected to the second surface through the second part.

[0006] Optionally, the battery module comprises a first adhesive layer, one side of the first adhesive layer being connected to the second part, and the other side of the first adhesive layer being connected to the second surface.

[0007] Optionally, the distance between the end of the second part away from the first part and the first part is L1, the distance between the end of the first adhesive layer away from the first part and the first part is L2, and 0.4≤L2 / L1≤0.6.

[0008] Optionally, the second part is provided with a fixing hole at the end away from the first part. The battery module comprises a binding belt, which is arranged in the fixing hole and connected to the wire harness.

[0009] Optionally, a plurality of fixing holes are arranged at intervals, and the plurality of fixing holes are arrayed along the extension direction of the second part. The distance between the center of the fixing hole away from the first part and the end of the second part away from the first part is L3, the distance between the end of the second part away from the first part and the first part is L1, and 0.05≤L3 / L1≤0.15.

[0010] Optionally, the battery module comprises a second adhesive layer, one side of the second adhesive layer is connected with the first surface, and the other side is connected with the first part.

[0011] Optionally, the second adhesive layer extends along the length direction of the battery assembly and has a continuous structure, the length of the first part in the direction perpendicular to the second surface is L4, the length of the second adhesive layer is L5, and 0.1≤L5 / L4≤0.2.

[0012] Optionally, a plurality of second adhesive layers are arranged at intervals along the length direction of the battery assembly.

[0013] Optionally, the second adhesive layer is arranged at one end of the first part close to the second part and at one end of the first part away from the second part.

[0014] The battery module has the advantages that:

[0015] The battery module comprises a battery assembly and a wire harness, the battery assembly comprises a shell assembly, an explosion-proof valve and an aluminum bar, the shell assembly has adjacent first and second surfaces, the explosion-proof valve and the aluminum bar are arranged on the first surface, the wire harness is connected with the second surface, and the wire harness and the aluminum bar are electrically connected.

[0016] In actual application, by arranging the wire harness and the explosion-proof valve on the adjacent two surfaces of the battery module, i.e., arranging the wire harness on the second surface of the shell and arranging the explosion-proof valve and the aluminum bar on the first surface of the shell, the high-temperature gas generated by explosion of the explosion-proof valve can be effectively prevented from directly contacting the wire harness in thermal runaway. Since the explosion-proof valve is located on the first surface and the wire harness is located on the second surface, the separation design between them ensures that the high-temperature gas released by explosion of the explosion-proof valve will not directly damage the wire harness, thereby greatly reducing the risk of short circuit and misfire and improving the safety of the battery module. In addition, this structural design also avoids possible mutual interference between the explosion-proof valve and the wire harness, which helps to improve the stability and reliability of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0018] Figure 1 is a schematic diagram of the overall structure of the battery module provided by the embodiment of the present application;

[0019] Figure 2 is a side view of the battery module without a wire harness provided by the embodiment of the present application;

[0020] Figure 3 is a partial structure schematic view provided by the embodiment of the utility model for showing the battery module Figure 2 is a partial enlarged view of A area in the embodiment of the utility model

[0021] Figure 4 is a partial structure schematic view provided by the embodiment of the utility model for showing the battery module

[0022] Figure 5 is a partial structure schematic view provided by the embodiment of the utility model for showing the battery module

[0023] Figure 6 is a partial structure schematic view provided by the embodiment of the utility model for showing the battery module

[0024] Figure 7 is a partial structure schematic view provided by the embodiment of the utility model for showing the battery module

[0025] Explanation of figure mark:

[0026] 20, battery assembly;21, shell assembly;211, first face;212, second face;22, aluminum row;23, explosion-proof valve;30, protective film;31, first part;32, second part;321, fixing hole;40, wire harness;50, bandage;60, first adhesive layer;70, second adhesive layer. Specific implementation

[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0028] Please refer to Figure 1 , the embodiment of the utility model provides a whole structure schematic view of battery module. Figure 1

[0029] The embodiment of the utility model provides a battery module, comprising: battery assembly 20 and wire harness 40, battery assembly 20 includes shell assembly 21, explosion-proof valve 23 and aluminum row 22, shell assembly 21 has adjacent first face 211 and second face 212, explosion-proof valve 23 and aluminum row 22 are arranged in first face 211;Wire harness 40 is connected with second face 212, wire harness 40 and aluminum row 22 are electrically connected.

[0030] ​It is noted that the battery assembly 20 in the present application refers to the whole composed of a plurality of battery cells constituting a battery module, the shell assembly 21 refers to the whole composed of the shells of the plurality of battery cells constituting the battery assembly 20, and the aluminum bars 22 and the explosion-proof valves 23 both refer to the aluminum bars 22 and the explosion-proof valves 23 of the battery cells. In the embodiment of the present application, the battery assembly 20 includes a plurality of battery cells arranged in line in sequence, each of which is provided with an explosion-proof valve 23 and an aluminum bar 22, and the wire harness 40 and the plurality of aluminum bars 22 are electrically connected.

[0031] In actual application, by arranging the wire harness 40 and the explosion-proof valve 23 on the adjacent two faces of the battery module respectively, i.e. arranging the wire harness 40 on the second face 212 of the shell and arranging the explosion-proof valve 23 and the aluminum bar 22 on the first face 211 of the shell, the high-temperature gas generated by the explosion of the explosion-proof valve 23 can be effectively avoided from directly contacting the wire harness 40 in the thermal runaway. Since the explosion-proof valve 23 is located on the first face 211 and the wire harness 40 is located on the second face 212, the design of separation between them makes the high-temperature gas released by the explosion of the explosion-proof valve 23 not directly damaging the wire harness 40, thereby greatly reducing the risk of short circuit and misfire and improving the safety of the battery module. In addition, this structural design also avoids the possible mutual interference between the explosion-proof valve 23 and the wire harness 40, which helps to improve the stability and reliability of the battery module.

[0032] In an embodiment, referring to Figure 1 , the battery module includes a protective film 30, the protective film 30 includes a first part 31 and a second part 32, the first part 31 is arranged on the first face 211, the second part 32 is connected with the first part 31 and arranged on the second face 212, and the wire harness 40 is connected with the second face 212 through the second part 32.

[0033] In actual application, the arrangement of the protective film 30 not only can effectively prevent the damage of external substances to the battery assembly 20, but also can prevent the battery module from being affected by mechanical impact or environmental factors during use. In addition, the connection of the wire harness 40 with the second face 212 through the second part 32 ensures the stability and reliability of the wire harness 40 and reduces the risk of short circuit or other faults caused by the exposure or contact of the wire harness 40 with the external environment. This structure further improves the safety of the battery module and ensures the stable operation of the battery under different working conditions.

[0034] In the embodiment, the protective film 30 can be a polycarbonate film, and can also be a polyester film, a polyimide film, a polytetrafluoroethylene film, etc.

[0035] Further, referring to Figure 2 and Figure 3 , the battery module includes a first adhesive layer 60, one side of the first adhesive layer 60 is connected with the second part 32, and the other side of the first adhesive layer 60 is connected with the second face 212.

[0036] In practical applications, by setting the first adhesive layer 60, the adhesion between the protective film 30 and the battery module can be effectively enhanced, ensuring the firm fixation of the protective film 30 during the use of the battery module, and avoiding the shedding or displacement caused by vibration or external force. This not only improves the stability and sealing of the battery module, but also further prevents the damage of external environmental factors to the internal electronic components of the battery module. This design can also effectively isolate external substances, improve the protection performance of the battery module, and enhance the structural strength, reducing the risk of impact damage.

[0037] In this embodiment, the material of the first adhesive layer 60 can be foam, and can also be acrylic adhesive, epoxy resin, etc.

[0038] Further, referring to Figure 3 , the distance between the second part 32 away from the first part 31 and the first part 31 is L1, and the distance between the first adhesive layer 60 away from the first part 31 and the first part 31 is L2, 0.4≤L2 / L1≤0.6.

[0039] In practical applications, by setting the ratio of the distance L1 between the second part 32 and the first part 31 and the distance L2 between the first adhesive layer 60 away from the first part 31 and the first part 31 between 0.4 and 0.6, the structural stability and adhesion performance of the battery module can be effectively optimized. Specifically, this design can ensure that when the battery module is stressed, the combination of the adhesive layer and the protective film 30 is more uniform and reliable, thereby improving the compression resistance and deformation resistance of the structure. In addition, appropriate spacing setting helps to disperse stress and prevent excessive concentration in a certain part, reducing the risk of shedding or damage due to uneven adhesion or uneven stress. This also helps to improve the durability and safety of the battery module during long-term use, especially under temperature fluctuations and mechanical vibration, ensuring the overall performance and reliability of the battery module.

[0040] Optionally, referring to Figure 1 , the second part 32 is provided with a fixing hole 321, and the fixing hole 321 is located at the end of the second part 32 away from the first part 31; the battery module includes a binding belt 50, and the binding belt 50 is arranged in the fixing hole 321 and connected with the wire harness 40.

[0041] In practical applications, by opening a fixing hole 321 on the second part 32 and threading the binding band 50 through the fixing hole 321 to connect with the wire harness 40, the structural stability and safety of the battery module can be effectively improved. The fixing hole 321 provides a reliable connection point, so that the binding band 50 can stably fix the wire harness 40, avoiding the wire harness 40 from loosening or shifting due to external vibration, stretching or deformation of the battery module during use. The design of connecting the binding band 50 with the wire harness 40 through the fixing hole 321 helps to ensure that the wire harness 40 maintains the correct layout and position inside the battery module, avoiding electrical failure or short circuit caused by loosening of the wire harness 40.

[0042] In this embodiment, the binding band 50 is a cable tie.

[0043] Further, referring to Figure 4 , a plurality of fixing holes 321 are spaced apart and arrayed along the extension direction of the second part 32, the distance between the center of the fixing hole 321 away from the first part 31 and the end of the second part 32 away from the first part 31 is L3, the distance between the end of the second part 32 away from the first part 31 and the first part 31 is L1, and 0.05≤L3 / L1≤0.15.

[0044] In practical applications, by spacing a plurality of fixing holes 321 on the second part 32 and arraying them along the extension direction of the second part 32, the tension of the binding band 50 can be evenly distributed, improving the overall stability of the battery module. The design of multiple fixing holes 321 allows the binding band 50 to be supported at multiple contact points, thereby enhancing the connection strength between the binding band 50 and the wire harness 40 and reducing the possibility of loosening or mispositioning of the wire harness 40 inside the battery module. This uniform distribution design can effectively disperse external forces and reduce the damage or failure of a single fixing hole 321 due to uneven stress, improving the long-term reliability of the battery module. In addition, 0.05≤L3 / L1≤0.15 helps to ensure that the arrangement distance of the fixing hole 321 is neither too dense nor too sparse, thereby maintaining structural stability without increasing additional manufacturing difficulty or cost.

[0045] In an embodiment, referring to Figure 3 , the battery module includes a second adhesive layer 70, one side of the second adhesive layer 70 is connected with the first surface 211, and the other side is connected with the first part 31.

[0046] In practical applications, by adding the second adhesive layer 70 in the battery module, connecting one side of the second adhesive layer 70 with the first surface 211 of the battery module and the other side with the first part 31, the structural stability of the battery module can be further enhanced. The role of the second adhesive layer 70 is to provide additional adhesive support for the components of the battery module, especially between the first surface 211 and the first part 31, which can effectively prevent the components from loosening or falling off due to vibration or external force. This double adhesive design enhances the adhesive strength between the components and improves the reliability and durability of the battery module during use.

[0047] Further, referring to Figure 5 and Figure 6 , the second adhesive layer 70 extends along the length direction of the battery assembly 20 and has a continuous structure. In the direction perpendicular to the second surface 212, the length of the first part 31 is L4, and the length of the second adhesive layer 70 is L5, 0.1≤L5 / L4≤0.2.

[0048] In practical applications, by setting the proportional relationship between the length (L5) of the second adhesive layer 70 and the length (L4) of the first part 31 (0.1≤L5 / L4≤0.2), the proportion of the length of the second adhesive layer 70 and the length of the first part 31 can be reasonably controlled, and the problem of uneven structure or insufficient adhesive strength caused by the adhesive layer being too long or too short can be avoided.

[0049] In addition, the second adhesive layer 70 extends along the length direction of the battery assembly 20 and forms a continuous structure, which can provide more stable and uniform adhesive effect. The continuous adhesive layer ensures that each part of the battery assembly 20 can receive uniform fixing force in the entire length direction, thereby avoiding local weak adhesion or uneven adhesion and improving the structural strength and overall stability of the battery module.

[0050] Optionally, referring to Figure 7 , a plurality of second adhesive layers 70 are provided, and the plurality of second adhesive layers 70 are arranged at intervals along the length direction of the battery assembly 20.

[0051] In practical applications, the multiple adhesive layers arranged at intervals can effectively disperse the stress caused by external pressure or impact, and a certain gap is left between the adhesive layers, so that the battery assembly 20 can maintain a certain degree of freedom under the environment of thermal expansion or vibration, reducing the adhesive failure caused by expansion or deformation. This design is especially suitable for battery modules used in environments that need to withstand large external forces or high temperatures, improving the shock resistance and high-temperature resistance of the battery module.

[0052] Optionally, referring to Figure 6 , the second adhesive layer 70 is arranged at one end of the first part 31 close to the second part 32 and at the other end of the first part 31 away from the second part 32.

[0053] In the embodiment, the adhesive layers at the two ends of the first part 31 ensure firm fixation between the first part 31 and the second part 32 during the connection process of the first part 31. Since the adhesive layers are arranged at the two ends respectively, this distribution mode can reduce the adhesive stress at a single position, avoid local adhesive layer failure or cause structural deformation under external force, and further improve the overall reliability of the battery module.

[0054] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0055] It should also be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can be indirectly connected to the other element through a middle element.

[0056] In addition, the descriptions involving "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0057] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made by using the contents of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A battery module, characterized by, The battery module comprises a battery assembly, an explosion-proof valve and an aluminum row, the battery assembly has a first face and a second face adjacent to each other, the explosion-proof valve and the aluminum row are arranged on the first face; A wire harness is connected to the second face, and the wire harness and the aluminum row are electrically connected. The battery module comprises a protective film; 2. The battery module of claim 1, wherein, The protective film comprises a first part and a second part, the first part is arranged on the first face, and the second part is connected to the first part and arranged on the second face, and the wire harness is connected to the second face through the second part. The battery module comprises a first adhesive layer, one side of the first adhesive layer is connected to the second part, and the other side of the first adhesive layer is connected to the second face.

3. The battery module of claim 2, wherein, The distance between the end of the second part away from the first part and the first part is L1, and the distance between the end of the first adhesive layer away from the first part and the first part is L2, 0.4≤L2 / L1≤0.

6.

4. The battery module of claim 3, wherein, 5. The battery module of claim 3, wherein: The second part is provided with a fixing hole, and the fixing hole is located at the end of the second part away from the first part; The battery module comprises a binding belt, the binding belt is arranged in the fixing hole and connected to the wire harness. A plurality of fixing holes are arranged at intervals, and the plurality of fixing holes are arrayed along the extension direction of the second part, the distance between the center of the fixing hole away from the first part and the end of the second part away from the first part is L3, the distance between the end of the second part away from the first part and the first part is L1, and 0.05≤L3 / L1≤0.

15.

6. The battery module of claim 5, wherein, The battery module comprises a second adhesive layer, one side of the second adhesive layer is connected to the first face, and the other side is connected to the first part.

7. The battery module of any one of claims 2 to 6, wherein, The second adhesive layer extends along the length direction of the battery assembly and has a continuous structure, in the direction perpendicular to the second face, the length of the first part is L4, the length of the second adhesive layer is L5, and 0.1≤L5 / L4≤0.

2.

8. The battery module of claim 7, wherein, The second adhesive layer is arranged at intervals along the length direction of the battery assembly.

9. The battery module of claim 7, wherein, The second adhesive layer is arranged at the end of the first part close to the second part and the end of the first part away from the second part, respectively.

10. The battery module of claim 7, wherein, ​

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