Battery box body and battery pack
By using multiple fasteners to fix the battery cell tray to the battery box frame and adding sealant, the problem of high cost in the welding process is solved, achieving cost savings and improved locking strength.
Patent Information
- Application Number
- CN202323421243.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2033-12-14
AI Technical Summary
In the prior art, the welding process is used to fix the battery cell tray on the battery box, which is costly.
The cell tray is fixed on the box frame through multiple fixing parts, and a ring of sealant is provided between the edge of the cell tray and the box frame.
It saves tooling costs, enhances the locking strength of the cell tray on the box frame, and plays a sealing role.
Smart Images
Figure CN222355280U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery box and a battery pack. Background Art
[0002] With the development and progress of technology, electric vehicles are increasingly widely used. Electric vehicles are often equipped with battery packs, which are used to provide power to the electric vehicles. The battery packs are often equipped with battery boxes and battery packs, and the battery packs are arranged in the battery boxes. In the related art, a battery tray is arranged in the battery box to carry the battery pack, and the battery tray is fixed to the battery box by welding technology, which has the technical problem of high cost. Utility Model Content
[0003] The embodiments of the utility model provide a battery box and a battery pack, which can improve the technical problem of high cost of fixing a cell tray on the battery box by welding process in the related art.
[0004] In the first aspect, an embodiment of the utility model provides a battery box, including a box frame and at least one battery cell tray, the box frame including a plurality of side frame beams and at least one first middle beam, the plurality of side frame beams are connected end to end to form a surrounding frame, the first middle beam divides the space within the surrounding frame into a battery cell placement area and an electrical control area; the at least one battery cell tray is located in the battery cell placement area, the edge of the battery cell tray is fixedly connected to the box frame by a plurality of fixings, and a circle of sealant is also provided between the edge of the battery cell tray and the box frame.
[0005] In one embodiment, the battery box further comprises a bottom guard plate located at the bottom of the box frame, the bottom guard plate is arranged opposite to the battery cell tray, and the bottom guard plate is connected to the box frame.
[0006] In one embodiment, a pressure relief cavity is formed between the bottom guard plate and the battery cell tray, and a plurality of pressure relief holes are provided on the battery cell tray, and the plurality of pressure relief holes are communicated with the pressure relief cavity.
[0007] In one embodiment, the box frame further includes at least one second middle beam, and the at least one second middle beam divides the battery cell placement area into a plurality of battery cell placement sub-areas.
[0008] In one embodiment, the number of the battery cell trays is equal to the number of the battery cell placement sub-areas.
[0009] In one embodiment, the plurality of frame beams include a first beam, a second beam and a third beam, and the first beam, the second beam, the third beam and the first middle beam are connected end to end to form the battery cell placement area.
[0010] In one embodiment, the edge of the battery tray is fixedly connected to the first beam, the second beam, the third beam and the second middle beam through the multiple fixings; or the edge of the battery tray is fixedly connected to the first beam, the third beam, the first middle beam and the second middle beam through the multiple fixings; or the edge of the battery tray is fixedly connected to the first beam, the third beam and the two second middle beams through the multiple fixings.
[0011] In one embodiment, the battery cell tray is a flat plate structure.
[0012] In one embodiment, the fixing member is a rivet bolt.
[0013] In one embodiment, the distance between two adjacent rivet bolts is greater than 0 and less than or equal to 90 mm.
[0014] In a second aspect, an embodiment of the utility model provides a battery pack, comprising a battery group and the above-mentioned battery box, wherein the battery group is arranged on a cell tray in the battery box.
[0015] Beneficial effects of the embodiments of the utility model:
[0016] The battery box provided by the utility model specifically includes a box frame and at least one battery cell tray. The box frame includes multiple frame beams and at least one first middle beam. The multiple frame beams are connected end to end to form a surrounding frame. The first middle beam divides the space in the surrounding frame into a battery cell placement area and an electrical control area. At least one battery cell tray is located in the battery cell placement area. The edge of the battery cell tray is fixedly connected to the box frame through multiple fixings, and a circle of sealant is also arranged between the edge of the battery cell tray and the box frame. Therefore, the battery cell tray is fixed to the box frame through multiple fixings, which can save tooling costs. In addition, a circle of sealant is also arranged between the edge of the battery cell tray and the box frame, which can strengthen the locking strength of the battery cell tray on the box frame and also play a sealing role. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0018] Figure 1 It is a schematic diagram of an embodiment of a battery box provided by an embodiment of the utility model;
[0019] Figure 2It is a top view of a battery box provided by an embodiment of the utility model;
[0020] Figure 3 It is a partial schematic diagram of a battery box provided by an embodiment of the utility model;
[0021] Figure 4 It is a schematic diagram of an embodiment of a battery cell tray provided by an embodiment of the utility model;
[0022] Figure 5 It is a schematic diagram of an embodiment of a battery pack provided by an embodiment of the utility model;
[0023] Figure 6 It is an exploded view of a battery pack provided in an embodiment of the present utility model when viewed from above. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.
[0025] Since the cost of fixing the cell tray to the battery case by welding process in the related art is relatively high, for this reason, the embodiment of the present application provides a battery case and a battery pack, so that the cell tray can be fixed to the case frame by multiple fixings, which can save tooling costs, and a circle of sealant is also provided between the edge of the cell tray and the case frame, which can enhance the locking strength of the cell tray on the case frame and also play a sealing role. For specific solutions, please refer to the specific description below.
[0026] It should be noted that, hereinafter, the terms "battery module", "battery", "battery element", "battery cell" and "battery pack" can be used interchangeably and can refer to any of a variety of different rechargeable battery chemistries and structures, including but not limited to lithium ion (e.g., lithium ion phosphate, lithium cobalt oxide, lithium iron phosphate, other lithium oxide metals, etc.), lithium ion polymer, nickel metal hydride, nickel cadmium, nickel metal hydride, nickel zinc, silver zinc or other battery types / structures. The term "electric vehicle" is used here to refer to a fully electric vehicle also referred to as an EV, a plug-in hybrid vehicle also referred to as a PHEV, or a hybrid electric vehicle (HEV), wherein the hybrid vehicle uses multiple propulsion sources, one of which is an electric drive system. It should be understood that the same figure numbers are used in multiple figures to refer to the same components or components of equivalent functions, and various modifications to the preferred embodiments, general principles and features described herein will be obvious to those skilled in the art. In addition, the drawings are intended only to illustrate the scope of the present invention rather than limit it and should not be considered to be drawn to scale.
[0027] Embodiments of the utility model are generally applicable to systems using electric motors, and more specifically, but not exclusively, to electric vehicles using multi-phase electric motors (e.g., inductive motors). Electric vehicles use one or more stored energy sources such as battery packs to provide electrical energy to the vehicle. This energy is at least partially used to propel the vehicle. The stored energy can also be used to provide energy required by other vehicle systems, such as vehicle lighting, vehicle partitionable heating, ventilation and air conditioning (HVAC) systems, auxiliary control systems (e.g., sensors, displays, navigation systems, etc.), vehicle entertainment systems (e.g., radio, DVD, MP3, etc.), etc. Conventional electric vehicles include passenger vehicles and vehicles designed to transport goods, examples of which include passenger cars, trucks, electric bicycles, and recreational boats. Electric vehicles also include dedicated work vehicles and carts, some of which can be integrated with forklifts, scissor lifts, lifting and / or articulated boom aerial work platforms, street cleaning systems, conveyor belts, and flatbed handling platforms.
[0028] Specific, combined Figures 1 to 6 The battery box and battery pack provided by the utility model are described in detail, wherein: Figure 1 1 is a schematic diagram of an embodiment of a battery box provided by an embodiment of the utility model. Figure 2 is a top view of a battery box provided by an embodiment of the utility model, Figure 3 It is a partial schematic diagram of a battery box provided by an embodiment of the utility model. Figure 4 1 is a schematic diagram of an embodiment of a battery cell tray 200 provided in an embodiment of the present utility model. Figure 5 is a schematic diagram of an embodiment of a battery pack provided by an embodiment of the utility model, Figure 6It is an exploded view of a battery pack provided by an embodiment of the utility model from a top view. The battery box specifically includes a box frame 100 and at least one battery cell tray 200, the box frame 100 includes a plurality of side frame beams 10 and at least one first middle beam 104, the plurality of side frame beams 10 are connected end to end to form a frame, the first middle beam 104 divides the space within the frame into a battery cell placement area A1 and an electrical control area A2; the at least one battery cell tray 200 is located within the battery cell placement area A1, the edge of the battery cell tray 200 is fixedly connected to the box frame 100 through a plurality of fixings 300, and a circle of sealant is also provided between the edge of the battery cell tray 200 and the box frame 100 (obstructed by the battery cell tray 200, not shown in the figure).
[0029] It can be understood that in this embodiment, the battery tray 200 is fixed to the box frame 100 by multiple fixing parts 300, so that the battery tray 200 and the box frame 100 are integrated. Compared with the welding process, the tooling cost can be saved, and a circle of sealant is also arranged between the edge of the battery tray 200 and the box frame 100, which can enhance the locking strength of the battery tray 200 on the box frame 100, so that the locking strength of the battery tray 200 on the box frame 100 can meet the requirements and can also play a sealing role.
[0030] In some embodiments of the present application, the cell tray 200 is a flat plate structure. It is understandable that in this embodiment, by setting the cell tray 200 as a flat plate structure, its structure is simple and can be stamped. The stamping mold used is simple and the number of molds required is small, which can save mold costs. Among them, the material of the cell tray 200 can be 5083-O state, and the thickness of the cell tray 200 can be selected from 3-5 mm, and the present application is not limited to this.
[0031] In some embodiments of the present application, the fixing member 300 is a rivet bolt. It should be noted that the rivet bolt does not require tapping of internal threads, does not require welding of nuts, has high riveting efficiency, is easy to use, and has a lower cost compared to the FDS (Flow Drill Screw, hot melt self-drilling screw connection) process.
[0032] In some embodiments of the present application, the spacing between two adjacent rivet bolts is greater than 0 and less than or equal to 90 mm. It should be noted that in this embodiment, both rivet and glue (sealant) are applied in a circle. First, a circle of glue is applied on the beam corresponding to the installation of the battery tray 200 on the box frame 100, and then the battery tray 200 is placed on the corresponding beam, and then a circle of rivet is completed. Among them, the sealant is, for example, structural glue.
[0033] In some embodiments of the present application, the battery box further includes a bottom guard plate 400 (eg, Figure 5 ), the bottom guard plate 400 is arranged opposite to the cell tray 200, and the bottom guard plate 400 is connected to the box frame 100. Specifically, the bottom guard plate 400 is detachably connected to the box frame 100. After the cell tray 200 is fixed to the box frame 100 by riveting and gluing, the bottom guard plate 400 is locked, and the bottom guard plate 400 is connected to the box frame 100 by bolts, for example.
[0034] In some embodiments of the present application, a pressure relief chamber 40 is formed between the bottom guard plate 400 and the battery tray 200, and a plurality of pressure relief holes 201 are provided on the battery tray 200, and the plurality of pressure relief holes 201 are connected to the pressure relief chamber 40. It is understandable that when the battery cells in the battery pack 700 are in thermal runaway, the high-temperature and high-pressure gas can be discharged into the pressure relief chamber 40 through the pressure relief holes 201, thereby effectively preventing the high-temperature and high-pressure gas in thermal runaway from running into the battery compartment 600 (formed by the connection of the battery tray 200 and the box frame 100), causing short circuit and heat spread, thereby improving the safety of the product.
[0035] In some embodiments of the present application, the box frame 100 further includes at least one second middle beam 108, and the at least one second middle beam 108 divides the battery cell placement area A1 into a plurality of battery cell placement sub-areas A11. It can be understood that in this embodiment, by providing at least one second middle beam 108 in the battery cell placement area A1, the battery cell placement area A1 is divided into a plurality of battery cell placement sub-areas A11, thereby increasing the structural strength of the box frame 100 in the battery cell placement area A1.
[0036] In some embodiments of the present application, the number of the cell trays 200 is equal to the number of the cell placement sub-areas A11. It is understandable that, since the cell placement sub-areas A11 are separated by the second middle beam 108, the cell trays 200 can be fixed on the frame beam 10 and the second middle beam 108, so the number of the cell trays 200 can be set to be equal to the number of the cell placement sub-areas A11, and by setting a plurality of cell trays 200, the locking strength between the cell trays 200 and the box frame 100 can be further increased.
[0037] In some embodiments of the present application, the multiple frame beams 10 include a first beam 101, a second beam 102 and a third beam 103, and the first beam 101, the second beam 102, the third beam 103 and the first middle beam 104 are connected end to end to form the battery cell placement area A1; wherein, the edge of the battery cell tray 200 is fixedly connected to the first beam 101, the second beam 102, the third beam 103 and the second middle beam 108 through the multiple fixings 300; or the edge of the battery cell tray 200 is fixedly connected to the first beam 101, the third beam 103, the first middle beam 104 and the second middle beam 108 through the multiple fixings 300; or the edge of the battery cell tray 200 is fixedly connected to the first beam 101, the third beam 103 and the two second middle beams 108 through the multiple fixings 300.
[0038] It is understandable that if Figure 2 As shown, the first beam 101, the second beam 102, the third beam 103 and the first middle beam 104 are connected end to end to form a rectangular cell placement area A1, and the three second middle beams 108 divide the rectangular cell placement area A1 into four cell placement sub-areas A11. The four cell placement sub-areas A11 are corresponding to four cell trays 200. The edge of one cell tray 200 is fixedly connected to the first beam 101, the second beam 102, the third beam 103 and the second middle beam 108 by a plurality of rivet bolts; the edge of one cell tray 200 is fixedly connected to the first beam 101, the third beam 103, the first middle beam 104 and the second middle beam 108 by a plurality of rivet bolts; the edges of two cell trays 200 are fixedly connected to the first beam 101, the third beam 103 and the two second middle beams 108 by a plurality of rivet bolts.
[0039] In some embodiments of the present application, the plurality of frame beams 10 further include a fourth beam 105, a fifth beam 106, and a sixth beam 107, and the fourth beam 105, the fifth beam 106, the sixth beam 107, and the first intermediate beam 104 are connected end to end to form the electrical control area A2. The shape of the electrical control area A2 is, for example, a trapezoid, and the electrical control area A2 is used to place some electronic components.
[0040] In some embodiments of the present application, the battery box further includes an upper cover 500 located on the top of the box frame 100 , the upper cover 500 is arranged opposite to the battery cell tray 200 , and the upper cover 500 is detachably connected to the box frame 100 .
[0041] In some embodiments of the present application, the present invention further provides a battery pack, including a battery pack 700 and the above-mentioned battery box. The structure of the battery box is shown in FIG. Figures 1 to 6 And related instructions, the battery pack 700 is arranged on the battery cell tray 200 in the battery box. Specifically, the battery pack 700 is fixed to the battery cell tray 200 by a module structural adhesive 800. The module structural adhesive 800 here is not the invention point of this application and will not be described in detail here.
[0042] The embodiments of the present invention are described in detail above. Specific examples are cited herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. At the same time, for technicians in this field, according to the idea of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.
Claims
1. A battery box, characterized in that: include: The box frame includes a plurality of frame beams and at least one first middle beam, wherein the plurality of frame beams are connected end to end to form a surrounding frame, and the first middle beam divides the space within the surrounding frame into a battery cell placement area and an electrical control area; At least one battery cell tray is located in the battery cell placement area, the edge of the battery cell tray is fixedly connected to the box frame through a plurality of fixing parts, and a circle of sealant is also provided between the edge of the battery cell tray and the box frame.
2. The battery box according to claim 1, characterized in that: The battery box also includes a bottom guard plate located at the bottom of the box frame, the bottom guard plate is arranged opposite to the battery cell tray, and the bottom guard plate is connected to the box frame.
3. The battery box according to claim 2, characterized in that: A pressure relief cavity is formed between the bottom guard plate and the battery cell tray. A plurality of pressure relief holes are provided on the battery cell tray. The plurality of pressure relief holes are communicated with the pressure relief cavity.
4. The battery box according to claim 1, characterized in that: The box frame further includes at least one second middle beam, and the at least one second middle beam divides the battery cell placement area into a plurality of battery cell placement sub-areas.
5. The battery box according to claim 4, characterized in that: The number of the battery cell trays is equal to the number of the battery cell placement sub-areas.
6. The battery case according to claim 4, characterized in that: The plurality of frame beams include a first beam, a second beam and a third beam. The first beam, the second beam, the third beam and the first middle beam are connected end to end to form the battery cell placement area.
7. The battery case according to claim 6, characterized in that: The edge of the cell tray is fixedly connected to the first beam, the second beam, the third beam and the second middle beam through the plurality of fixing members; or The edge of the cell tray is fixedly connected to the first beam, the third beam, the first middle beam and the second middle beam through the plurality of fixing members; or The edge of the cell tray is fixedly connected to the first beam, the third beam and the two second middle beams through the plurality of fixing members.
8. The battery case according to any one of claims 1 to 7, characterized in that: The battery cell tray is a flat plate structure.
9. The battery case according to any one of claims 1 to 7, characterized in that: The fixing piece is a rivet bolt.
10. The battery case according to claim 9, characterized in that: The distance between two adjacent rivet bolts is greater than 0 and less than or equal to 90 mm.
11. A battery pack, characterized in that: It comprises a battery pack and a battery box according to any one of claims 1 to 10, wherein the battery pack is arranged on a cell tray in the battery box.