Battery shell, battery and battery module
By using self-repairing materials and grid-like insulating layers in the battery case, the safety performance problems of the battery under collision, vibration or impact are solved, and the effect of improving the battery safety performance and self-repair ability is achieved.
Patent Information
- Application Number
- CN202420513119.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-03-15
AI Technical Summary
During the use of the battery, it is easy to suffer from collision, vibration or impact, resulting in varying degrees of deformation of the black film and protective patch and damage, affecting the safety performance of the battery.
A battery housing is designed, including a housing, a thermal conductivity, an insulating layer and a thermal insulation layer. The insulating layer is made of a self-repair material, and a plurality of grooves are provided between the thermally conductive layer and the thermally insulating layer to form a grid-like structure to improve the tensileability and heat dissipation effect of the insulating layer.
Through self-repairing materials and grid-like structure, the damage caused by deformation of the insulating layer under external factors is reduced, the safety performance of the battery is improved, and self-repair is completed within a certain period of time to ensure the insulation effect.
Smart Images
Figure CN222440709U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of battery processing, in particular to a battery shell, a battery and a battery module. Background Art
[0002] In recent years, the market share of new energy vehicles has increased year by year, and people have also put forward higher requirements on the performance of new energy vehicles. Among them, safety performance is the primary key to new energy vehicles.
[0003] At present, the outside of the aluminum shell of the power battery usually needs to use a top cover protection patch and an insulating film to insulate it from the outside to ensure the safety performance of the battery. However, during the use of the battery, it will inevitably be subjected to collision, vibration or impact, causing the black film and the protective patch to be deformed to varying degrees and damaged, affecting the safety performance of the battery. Utility Model Content
[0004] To this end, the utility model provides a battery casing, a battery and a battery module, which solve the technical problem that the black film and the protective patch are inevitably subjected to collision, vibration or impact during the use of the battery, causing different degrees of deformation and damage, thereby affecting the safety performance of the battery.
[0005] To achieve the above-mentioned purpose, the utility model specifically provides the following technical solutions: a battery shell, characterized in that it includes: a shell; a heat-conducting layer, which is arranged on the outside of the shell; an insulating layer, which has an insulating effect; the insulating layer is arranged on the side of the heat-conducting layer away from the shell; the insulating layer is made of self-healing material; a heat-insulating layer, which is arranged on the side of the insulating layer away from the heat-conducting layer; the insulating layer is provided with a plurality of first grooves, and the plurality of first grooves are arranged on the end surface of the insulating layer facing the heat-conducting layer or on the end surface facing the heat-insulating layer, and the plurality of first grooves are arranged in sequence and at intervals, so that the end surface of the insulating layer provided with the first grooves is arranged in a grid shape.
[0006] Optionally, the first groove is arranged on an end surface of the insulating layer facing the heat conductive layer, and a plurality of second grooves are arranged on the end surface of the insulating layer facing the heat insulating layer. The plurality of second grooves are arranged in sequence and at intervals so that the end surface of the insulating layer provided with the second grooves is arranged in a grid shape.
[0007] Optionally, the insulating layer is provided with a through groove and fine holes, the through groove is arranged through, and there are multiple fine holes, one end of the multiple fine holes is connected to the through groove, and the other end of the multiple fine holes is connected to the multiple first grooves respectively.
[0008] Optionally, a plurality of the first grooves are arranged in sequence along the first horizontal direction and the second horizontal direction, and a plurality of the second grooves are arranged in sequence along the first horizontal direction and the second horizontal direction; and an angle is formed between the first horizontal direction and the second horizontal direction.
[0009] Optionally, the total thickness of the heat-conducting layer, the insulating layer and the heat-insulating layer is less than or equal to 20 mm, and the width of the first groove is less than or equal to 900 μm.
[0010] Optionally, the heat-conducting layer is made of a self-healing material and a heat-conducting material.
[0011] Optionally, the thermally conductive material includes one or more of graphene oxide, aluminum oxide, aluminum nitride or hexagonal boron nitride.
[0012] Optionally, the self-healing material includes one or more of polyurethane or polyetherthiourea.
[0013] In addition, a battery is provided, comprising the above-mentioned battery casing and a battery cell, wherein the battery cell is arranged in a shell of the battery casing.
[0014] In addition, a battery module is provided, comprising a plurality of the above-mentioned batteries.
[0015] Compared with the prior art, the utility model has the following beneficial effects: in the embodiment of the utility model, the shell can accommodate the electronic components of the battery, and the heat-conducting layer is arranged on the outer side of the shell so that the heat emitted by the electronic components inside the shell can be transferred through the heat-conducting layer; the insulating layer is arranged on the side of the heat-conducting layer away from the shell, and the insulating layer can play an insulating effect, and the heat-insulating layer is arranged on the side of the insulating layer away from the heat-conducting layer, and the heat-insulating layer can play a heat-insulating effect; the end face of the insulating layer provided with the first groove is arranged in a grid shape, and the first groove is arranged to make the stretchability of the insulating layer better, reduce the damage to the insulating layer when the insulating layer is deformed due to external factors, and improve the safety, and the insulating layer is made of self-healing material, so that after the insulating layer is damaged, the insulating layer can complete self-repair within a certain period of time to ensure the insulating effect of the insulating layer, thereby ensuring the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0017] Figure 1A schematic structural diagram of a heat-conducting layer, an insulating layer and a heat-insulating layer of a battery housing provided in an embodiment of the utility model;
[0018] Figure 2 A partial cross-sectional view of a battery housing provided by an embodiment of the utility model;
[0019] Figure 3 A schematic structural diagram of an insulating layer of a battery casing provided in an embodiment of the utility model.
[0020] Reference numerals:
[0021] Shell 100 ; heat-conducting layer 200 ; insulating layer 300 ; first groove 310 ; second groove 320 ; fine hole 330 ; through groove 340 ; heat-insulating layer 400 . DETAILED DESCRIPTION
[0022] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in 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.
[0023] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.
[0024] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying 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 a limitation on the present invention.
[0025] Reference below Figures 1 to 3 A battery housing, a battery, and a battery module according to embodiments of the present invention are described.
[0026] According to the battery shell of the embodiment of the utility model, the battery shell includes a shell 100, a heat-conducting layer 200, an insulating layer 300 and a heat-insulating layer 400; the heat-conducting layer 200 is arranged on the outer side of the shell 100; the insulating layer 300 has an insulating effect; the insulating layer 300 is arranged on the side of the heat-conducting layer 200 away from the shell 100; the insulating layer 300 is made of self-healing material; the heat-insulating layer 400 is arranged on the side of the insulating layer 300 away from the heat-conducting layer 200; the insulating layer 300 is provided with a plurality of first grooves 310, and the plurality of first grooves 310 are arranged on the end surface of the insulating layer 300 facing the heat-conducting layer 200 or the end surface facing the heat-insulating layer 400, and the plurality of first grooves 310 are arranged in sequence and spaced apart so that the end surface of the insulating layer 300 provided with the first grooves 310 is arranged in a grid shape.
[0027] In the embodiment of the utility model, the shell 100 can accommodate the electronic components of the battery, and the heat-conducting layer 200 is arranged on the outer side of the shell 100 so as to transfer the heat emitted by the electronic components inside the shell 100 through the heat-conducting layer 200; the insulating layer 300 is arranged on the side of the heat-conducting layer 200 away from the shell 100, and the insulating layer 300 can play an insulating effect; the heat-insulating layer 400 is arranged on the side of the insulating layer 300 away from the heat-conducting layer 200, and the heat-insulating layer 400 can play an insulating effect; the end surface of the insulating layer 300 provided with the first groove 310 is arranged in a grid shape, and the first groove 310 is provided to make the stretchability of the insulating layer 300 better, reduce the damage to the insulating layer 300 when the insulating layer 300 is deformed due to external factors, and improve the safety, and the insulating layer 300 is made of self-healing material, so that after the insulating layer 300 is damaged, the insulating layer 300 can complete self-repair within a certain period of time to ensure the insulating effect of the insulating layer 300, thereby ensuring the safety performance of the battery.
[0028] Specifically, by arranging the insulating layer 300 in a grid shape toward one end of the heat conducting layer 200 , the effect of the heat conducting layer 200 transferring heat to the insulating layer 300 can be improved, so that the heat conducting effect of the heat conducting layer 200 can be improved.
[0029] Specifically, the grid-shaped arrangement of the insulating layer 300 can make the surface area of the insulating layer 300 larger, and because the first groove 310 and the second groove 320 are concavely arranged, the thickness at the center of the grid structure of the insulating layer 300 can be thinner than the thickness at the grid line, so as to improve the heat dissipation effect and tensile performance of the insulating layer 300.
[0030] Specifically, the heat-conducting layer 200 and the insulating layer 300 may be a corrugated structure, so as to have a buffering effect and reduce the impact of external factors on the heat-conducting layer 200 and the insulating layer 300.
[0031] Reference Figure 1and Figure 2 It can be understood that the first groove 310 is arranged on an end surface of the insulating layer 300 facing the heat conducting layer 200, and a plurality of second grooves 320 are arranged on the end surface of the insulating layer 300 facing the heat insulating layer 400. The plurality of second grooves 320 are arranged in sequence and at intervals, so that the end surface of the insulating layer 300 provided with the second grooves 320 is arranged in a grid shape.
[0032] A plurality of second grooves 320 are arranged on the end surface of the insulating layer 300 facing the heat insulating layer 400 so that the end surface of the insulating layer 300 facing the heat insulating layer 400 is arranged in a grid shape. By arranging the first grooves 310 and the second grooves 320 , the insulating layer 300 can have better stretchability.
[0033] Specifically, a plurality of second grooves 320 are arranged on the end surface of the insulating layer 300 facing the thermal insulation layer 400, so that the end surface of the insulating layer 300 facing the thermal insulation layer 400 is arranged in a grid shape, so as to further improve the stretchability of the insulating layer 300, reduce the damage to the insulating layer 300 when the insulating layer 300 is deformed due to external factors, and improve safety.
[0034] Reference Figure 2 It can be understood that the insulating layer 300 is provided with a through groove 340 and a pore 330, the through groove 340 is set through, and there are multiple pores 330, one end of the multiple pores 330 is connected to the through groove 340, and the other end of the multiple pores 330 is connected to the multiple first grooves 310 respectively.
[0035] The through grooves and the pores 330 can facilitate gas circulation and gas exchange, thereby improving the heat dissipation effect of the heat-conducting layer 200 and the insulating layer 300 .
[0036] Specifically, a plurality of through grooves may be provided, and a plurality of fine holes 330 are connected to the plurality of through grooves one by one. The through grooves may be extended along the length direction or the width direction of the insulating layer; wherein, the end face of the insulating layer 300 provided with the first groove 310 is the lower end face, and the end face of the insulating layer 300 provided with the second groove 320 is the upper end face, and the two ends of the through grooves are respectively connected to the side end faces of the insulating layer 300, and the through grooves may be curved.
[0037] Reference Figure 2 and Figure 3 It can be understood that the plurality of first grooves 310 are sequentially arranged along the first horizontal direction and the second horizontal direction, and there is an angle between the first horizontal direction and the second horizontal direction, so as to ensure the stretchability of the insulating layer 300 and make the surface of the insulating layer 300 neat and beautiful. Specifically, the angle between the first horizontal direction and the second horizontal direction is a right angle.
[0038] It can be understood that the plurality of second grooves 320 are arranged in sequence along the first horizontal direction and the second horizontal direction, and there is an angle between the first horizontal direction and the second horizontal direction, so as to ensure the stretchability of the insulating layer 300 and make the surface of the insulating layer 300 neat and beautiful. Specifically, the angle between the first horizontal direction and the second horizontal direction is a right angle; wherein the first groove 310 and the second groove 320 of the insulating layer 300 are symmetrically arranged.
[0039] It can be understood that in order to adapt to batteries with smaller structures, by setting the total thickness of the thermal conductive layer 200, the insulating layer 300 and the thermal insulation layer 400 to be less than or equal to 20 mm, the structure of the battery shell can be reduced while ensuring the structural effect of each layer, and the size of the occupied space can be reduced. The width of the first groove 310 is less than or equal to 900 microns, so as to improve the stretchability of the insulating layer 300 and the heat dissipation of the insulating layer 300; specifically, the width of the second groove 320 is less than or equal to 900 microns.
[0040] Of course, according to the specific actual situation, the total thickness of the thermal layer 200, the insulating layer 300 and the thermal insulation layer 400 can be greater than 20 mm, the width of the first groove 310 and the second groove can be greater than 900 microns, and the thickness of the thermal insulation layer 400 can be adjusted within a suitable thickness range according to actual needs to meet the thermal insulation buffer between battery cells in the battery module.
[0041] It can be understood that the thermal conductive layer 200 is made of self-healing material and thermal conductive material, so that the thermal conductive layer 200 has a self-healing effect. After the battery shell 100 is damaged, the thermal conductive layer 200 can complete self-repair within a certain period of time to ensure the insulation effect of the thermal conductive layer 200 and ensure the safety performance of the battery.
[0042] Specifically, the heat-conducting layer 200 uses a heat-conducting material as a substrate so as to have a good heat-conducting effect, and the material constituting the heat-conducting layer 200 may also include a self-healing material so as to have a self-healing effect.
[0043] It can be understood that the thermal conductive material is made of one or more of graphene oxide, aluminum oxide, aluminum nitride or hexagonal boron nitride to ensure the thermal conductivity of the thermal conductive layer 200. The thermal conductive layer 200 can be made of a single material to reduce processing costs and difficulty. Of course, it can also be made of multiple materials to ensure the thermal conductivity. According to the specific actual situation, the thermal conductive layer 200 can also be made of other materials with good thermal conductivity.
[0044] The self-healing material is made of one or more of polyurethane or polyether thiourea to ensure the self-healing effect and insulation effect of the insulating layer 300. The insulating layer 300 can be made of a single material to reduce processing costs and processing difficulties. Of course, the insulating layer 300 can also be made of multiple materials to ensure the self-healing effect and insulation effect. According to the specific actual situation, the insulating layer 300 can also be made of other substances with good self-healing effect and insulation effect.
[0045] It can be understood that the thermal insulation layer 400 is made of one or more of thermal insulation pads, glass fiber, asbestos, rock wool, silicate, aerogel felt, vacuum panels, foam materials, fiber materials or polyimide films to ensure the thermal insulation effect of the thermal insulation layer 400, wherein the thermal insulation layer 400 can be made of a single material to reduce processing costs and processing difficulties. Of course, the thermal insulation layer 400 can also be made of multiple materials to ensure the thermal insulation effect.
[0046] Specifically, the thermal conductive layer 200, the insulating layer 300 and the thermal insulation layer 400 are all elastic, so as to have a shock-absorbing effect, reduce the damage of the shell 100 of the battery shell to collision during use, and improve safety, and the thermal conductive layer 200, the insulating layer 300 and the thermal insulation layer 400 are all pressure-resistant, so as to reduce the compression degree of the thermal conductive layer 200, the insulating layer 300 and the thermal insulation layer 400 when the battery shell is pushed due to external factors, thereby ensuring the elastic deformation ability of the thermal conductive layer 200, the insulating layer 300 and the thermal insulation layer 400.
[0047] The heat conducting layer 200 and the insulating layer 300 may be formed by overall coating or grid coating, wherein the pore size of the grid structure of the insulating layer 300 is 1 μm to 900 μm.
[0048] Among them, from the shell 100 to the outside, there are the overall coating of the heat-conducting layer and the grid coating of the insulating layer. The insulating layer preferably contains a heat-conducting material, and the heat-conducting layer preferably contains a self-healing material.
[0049] It can be understood that the heat conducting layer 200 is partially disposed in the first groove 310 .
[0050] Specifically, the thermal conductive layer 200 can be coated on the outside of the shell 100, and the insulating layer 300 is arranged in a grid shape on one end surface facing the thermal conductive layer 200, and the insulating layer 300 has stretchability so that the end portion of the thermal conductive layer 200 facing the insulating layer 300 is located in the first groove 310, so as to increase the contact area between the thermal conductive layer 200 and the insulating layer 300, thereby improving the effect of the thermal conductive layer 200 transferring heat to the insulating layer 300.
[0051] According to the battery of the embodiment of the utility model, the battery includes a battery casing and a battery cell, and the battery cell is arranged in a shell 100 of the battery casing.
[0052] Specifically, a plurality of battery cells are provided, and all are arranged in a shell, and the battery cells can be protected by the shell 100 of the battery shell; by providing a thermal insulation layer 400, there is no need to add additional thermal insulation buffer pads between the multiple battery cells, and the structure of the battery cell with a thermal insulation buffer effect can be omitted. The thermal insulation layer 400 can play a role in thermal insulation of the battery cell, so as to improve the energy density and simplify the process flow.
[0053] According to the battery module of the embodiment of the utility model, the battery module includes a plurality of batteries; specifically, the plurality of batteries are arranged at intervals, and the plurality of batteries can be electrically connected in series or in parallel.
[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A battery housing, characterized in that: include: Housing (100); A heat-conducting layer (200) is arranged on the outer side of the housing (100); An insulating layer (300) having an insulating effect; the insulating layer (300) is arranged on a side of the heat-conducting layer (200) away from the housing (100); the insulating layer (300) is made of a self-healing material; The heat insulating layer (400) is arranged on a side of the insulating layer (300) away from the heat conducting layer (200); the insulating layer (300) is provided with a plurality of first grooves (310); the plurality of first grooves (310) are arranged on an end surface of the insulating layer (300) facing the heat conducting layer (200) or on an end surface facing the heat insulating layer (400); the plurality of first grooves (310) are arranged in sequence and at intervals, so that the end surface of the insulating layer (300) provided with the first grooves (310) is arranged in a grid shape.
2. The battery housing according to claim 1, characterized in that: The first groove (310) is arranged on an end surface of the insulating layer (300) facing the heat-conducting layer (200), and a plurality of second grooves (320) are arranged on the end surface of the insulating layer (300) facing the heat-insulating layer (400). The plurality of second grooves (320) are arranged in sequence and at intervals, so that the end surface of the insulating layer (300) provided with the second grooves (320) is arranged in a grid shape.
3. The battery housing according to claim 2, characterized in that: The insulating layer (300) is provided with a through groove (340) and a fine hole (330); the through groove (340) is arranged to be through-through; a plurality of the fine holes (330) are arranged; one end of the plurality of fine holes (330) is connected to the through groove (340); and the other ends of the plurality of fine holes (330) are respectively connected to the plurality of first grooves (310).
4. The battery housing according to claim 2, characterized in that: The plurality of first grooves (310) are arranged in sequence along the first horizontal direction and the second horizontal direction, respectively; the plurality of second grooves (320) are arranged in sequence along the first horizontal direction and the second horizontal direction, respectively; and an angle is formed between the first horizontal direction and the second horizontal direction.
5. The battery housing according to claim 1, characterized in that: The total thickness of the heat-conducting layer (200), the insulating layer (300) and the heat-insulating layer (400) is less than or equal to 20 millimeters, and the width of the first groove (310) is less than or equal to 900 micrometers.
6. The battery housing according to claim 1, characterized in that: The heat-conducting layer (200) is made of a self-healing material and a heat-conducting material.
7. The battery housing according to claim 6, characterized in that: The thermally conductive material includes one or more of graphene oxide, aluminum oxide, aluminum nitride or hexagonal boron nitride.
8. The battery casing according to claim 1 or 6, characterized in that: The self-healing material includes one or more of polyurethane or polyetherthiourea.
9. A battery, characterized in that include: The battery casing according to any one of claims 1 to 8; The battery cell is arranged in the shell (100) of the battery casing.
10. A battery module, characterized in that: include: A plurality of batteries as claimed in claim 9.