Stacked arrangement structure with high insulating property

Abstract

The utility model provides a high-insulativity stacking structure, which is used for connecting a battery cell assembly and sequentially comprises a top insulating layer, a fixing layer, a middle insulating layer, an acquisition layer, a lower insulating layer and a confluence layer from top to bottom, the top insulating layer, the fixing layer, the middle insulating layer, the acquisition layer, the lower insulating layer and the confluence layer are sequentially laminated and are pressed into a whole through plastic rivets; the top insulating layer, the middle insulating layer and the lower insulating layer are all made of high-temperature-resistant, high-strength and high-hardness nonmetal materials. And the strength of the stacking structure and the internal insulation performance of the stacking structure are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy power battery pack and energy storage technology, in particular to a high insulation stacked structure. BACKGROUND

[0002] The existing stacked structure is a multi-layer structure, each layer in the multi-layer structure needs to be assembled to the battery cell assembly separately, which leads to complicated and unreliable process. There is also a stacked structure with multi-layer pressing, but the physical isolation between layers is realized by a soft film with a thickness of no more than 0.2 mm to achieve the effect of light weight and miniaturization. Whether it is burr of the part itself or the pressing process, it is easy to cause damage to the insulation film. If the insulation performance between the multiple layers is lost, it will cause short circuit. In addition, the pressing is generally laminated and bonded. The heat generated by the battery cell assembly and frequent vibration will cause unreliable connection between layers and affect the insulation performance. Moreover, the bus bars and collection bars are arranged at different positions on a plate support, which is relatively complicated in assembly and production. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the embodiment of the present application provides a high insulation stacked structure, which can fully guarantee the insulation performance inside the stacked structure, and is reliable in connection, easy to operate, low in cost and simple in production.

[0004] The embodiment of the present application provides the following technical scheme: a high insulation stacked structure for connecting a battery cell assembly, the stacked structure sequentially comprises a top insulation layer, a fixed layer, a middle insulation layer, a collection layer, a lower insulation layer and a bus layer from top to bottom; the fixed layer is made of metal material and used to bear the weight of the battery cell assembly; the collection layer is made of FR4 structure and has a copper layer circuit inside, which is used to collect voltage and temperature information of the battery cell and output; the bus layer adopts a plurality of metal bus bars, and the plurality of metal bus bars are used to be welded with positive and negative poles of a plurality of battery cells; the top insulation layer, the fixed layer, the middle insulation layer, the collection layer and the lower insulation layer are sequentially laminated and pressed into an integral whole by plastic rivets; the top insulation layer, the middle insulation layer and the lower insulation layer are all made of high-temperature-resistant, high-strength and high-hardness non-metallic plates; the top insulation layer, the fixed layer, the middle insulation layer, the collection layer and the lower insulation layer are all plates with the same shape and size; the metal bus bars arranged on the front and back sides of the bus layer extend in the same oblique direction; the metal bus bars arranged in the middle of the bus layer extend in the front and back directions and are arranged in an interlaced manner; the lower insulation layer and the collection layer are provided with windows corresponding to the positions of the metal bus bars; and the top insulation layer, the fixed layer, the middle insulation layer, the collection layer, the lower insulation layer and the bus layer are all provided with fixing holes for the plastic rivets.

[0005] Further, the three insulation layers are all made of high-temperature-resistant, high-strength and high-hardness non-metallic plates.

[0006] Further, the high-temperature-resistant, high-strength and high-hardness non-metallic plates have a thickness of 2-3 mm, and the thicknesses of the insulation layers are the same.

[0007] Further, all laminated plastic rivets are used for pressing.

[0008] Further, the top insulation layer, the fixed layer, the middle insulation layer, the collection layer and the lower insulation layer are plates with the same shape and size.

[0009] Further, the electric core is a cylindrical electric core or a square electric core.

[0010] Further, the bus bar is an aluminum bar or a copper bar.

[0011] Further, the high-temperature-resistant, high-strength and high-hardness non-metal material also has heat insulation and flame retardation.

[0012] Compared with the prior art, the above at least one technical scheme adopted by the embodiment of the present application can achieve the beneficial effects at least including:

[0013] (1) The stacking structure of the utility model is a whole, and when connected with the electric core assembly, it does not need to be assembled separately, and can be directly connected with the electric core assembly as a whole.

[0014] (2) The insulation layer of the stacking structure of the utility model is a high-strength and high-hardness non-metal part, which will not be pierced by burrs, and the thickness is set to 2-3mm, which can not only ensure the insulation performance but also strengthen the strength of the stacking, and the pressing process will not be damaged, which can fully ensure the insulation performance, and the bus layer and the fixed layer are completely separated to ensure safety and pressure resistance. The high-strength and high-hardness non-metal part has heat insulation and flame retardation, which can better protect the electric core and ensure safety.

[0015] (3) The utility model adopts plastic rivet pressing, which is convenient and controllable, low in cost and high in strength, will not damage the insulation layer, and is helpful to improve the reliability of the stacking connection.

[0016] (4) The utility model is different from the bus layer, and the rest of the layers are plates with the same shape and size, which is helpful to modular production and convenient for pressing; compared with the form of assembling the bus piece / collection piece on a plate support, it is helpful to simplify the production. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0018] Figure 1 is the overall structure schematic diagram of the stacking of the embodiment of the present application;

[0019] Figure 2is an internal structure diagram of the stack of the embodiment of the present application.

[0020] The numbering in the figure is explained as follows: 11 - top insulating layer, 12 - fixed layer, 13 - middle insulating layer, 14 - collection layer, 15 - lower insulating layer, 16 - busbar layer, 161 - metal busbar, 17 - rivet. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0022] The embodiments of the present application are described below through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. Obviously, the described embodiments are only some of the embodiments of the present application, not all. The present application can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] A high-insulation stack structure of the embodiment, a structure schematic diagram of which is shown in Figure 1 and Figure 2 . It comprises, from top to bottom, a top insulating layer 11, a fixed layer 12, a middle insulating layer 13, a collection layer 14, a lower insulating layer 15, and a busbar layer 16. The fixed layer is made of metal material and is used to bear the weight of the battery assembly. The three insulating layers are all high-temperature-resistant, high-strength, and high-hardness non-metallic material plates with a thickness of 2-3 mm. The above non-metallic material is used to replace the general insulating film, which can fully prevent damage to the insulating film in the processing process. At the same time, since it is a plate, the overall strength of the stack is also improved. The collection layer 14 is of FR4 structure and has a copper layer circuit inside, which can collect the voltage and temperature information of the battery and output it. The busbar layer 16 adopts multiple metal busbars 161. They are sequentially stacked and pressed in order as shown in Figure 2 , and are pressed together by plastic rivets 17.

[0024] Preferably, the metal busbars of the front and rear two rows of the busbar layer extend obliquely and have the same extension direction, and the metal busbars of the middle two rows extend in the front-rear direction and are arranged in an interlaced manner.

[0025] Preferably, the lower insulating layer and the collection layer are provided with windows corresponding to the positions of the metal busbars.

[0026] Preferably, the top insulating layer, fixing layer, middle insulating layer, collecting layer, lower insulating layer, and busbar layer are all provided with fixing holes for passing through plastic rivets.

[0027] Preferably, the top insulating layer, fixing layer, middle insulating layer, collecting layer, and bottom insulating layer are all boards with the same shape and size. This facilitates modular production, and the device can be used immediately after pressing, eliminating the need to assemble busbars, collecting plates, and other components separately, thus simplifying the process.

[0028] Preferably, the thickness of each insulating layer is the same, but it can also be different.

[0029] Preferably, the busbar is an aluminum busbar or a copper busbar.

[0030] Preferably, the high-temperature resistant, high-strength, and high-hardness non-metallic material also has heat insulation and flame-retardant properties, which can better protect the battery cell and ensure safety.

[0031] The aforementioned insulation layer completely separates the bus layer and the fixing layer to ensure sufficient safety and pressure resistance. The 2-3mm thick insulation layer ensures that the burrs of the fixing layer will not puncture the insulation layer and has high stacking strength. The plastic rivet pressing operation is convenient and controllable and will not cause the insulation layer to fail, thus better coping with high temperature and vibration environments.

[0032] Therefore, this invention improves the insulation performance of the stacked structure and enhances its stability by addressing the issues of structure, material, thickness, and pressing technology.

[0033] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0034] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-insulation performance stack structure for connecting a battery cell assembly, the stack structure comprising, from top to bottom, a top insulating layer, a fixing layer, a middle insulating layer, a collecting layer, a lower insulating layer, and a busbar layer; wherein, The fixed layer is made of metal material and used to bear the weight of the battery assembly; the collection layer is made of FR4 structure and has copper layer circuit inside, used to collect the voltage and temperature information of the battery and output; the busbar layer has multiple metal conductive bars, which are used to be welded with the positive and negative poles of multiple batteries; the top insulation layer, the fixed layer, the middle insulation layer, the collection layer, the lower insulation layer and the busbar layer are sequentially laminated and press-fitted into an integral whole by plastic rivets; The top insulation layer, the middle insulation layer and the lower insulation layer are all made of high-temperature-resistant, high-strength and high-hardness non-metallic material; the top insulation layer, the fixed layer, the middle insulation layer, the collection layer and the lower insulation layer are all plates with the same shape and size; the metal conductive bars arranged on the front and back sides of the busbar layer extend in the same oblique direction, and the metal conductive bars arranged in the middle two rows extend in the front-back direction and are staggered with each other; the lower insulation layer and the collection layer are provided with windows corresponding to the positions of the metal conductive bars; the top insulation layer, the fixed layer, the middle insulation layer, the collection layer, the lower insulation layer and the busbar layer are all provided with fixing holes for passing through plastic rivets.

2. The stacked structure of claim 1, wherein The thickness of the top insulation layer, the middle insulation layer and the lower insulation layer is 2-3 mm.

3. The stacked structure of claim 2, wherein The thickness of each insulation layer is the same.

4. The stacked structure of claim 3, wherein The battery is a cylindrical battery or a square battery.

5. The stacked structure of claim 4, wherein The busbar is made of aluminum or copper.

6. The stacked structure of claim 5, wherein The high-temperature-resistant, high-strength and high-hardness non-metallic material also has heat insulation and flame retardant properties.

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