Battery box body and battery

Abstract

The embodiment of the utility model provides a battery box and a battery, the battery box comprises a box body and a reinforcing assembly, the box body comprises a bottom plate and a plurality of side plates, the bottom plate and the side plates define a containing cavity, the reinforcing assembly is arranged on the box body, the reinforcing assembly comprises a plurality of supports, and the supports comprise a first support, a second support and a third support; the first support and the second support are located in the containing cavity, the first support and the second support are overlapped on the side plates and form a lap joint part, and the third support is arranged outside the containing cavity and connected with the lap joint part through the side plates. According to the battery box body provided by the embodiment of the invention, the brackets of the reinforcing assembly are connected with the box body, so that the overall strength of the battery box body is improved, and the use requirements of the battery box body under complex working conditions are met.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a battery box and a battery. Background Art

[0002] New energy vehicles have entered a period of rapid development. Battery technology is an important factor in their development. As the carrier of the battery, the battery box also puts forward more stringent requirements on the structural strength of the battery box.

[0003] In order to improve the structural strength of the battery case, existing battery cases are often provided with reinforcement components to improve the structural strength of the battery case through the reinforcement components. However, the existing reinforcement components can only strengthen the strength of each area individually, which makes it difficult to ensure the reliable use of the battery case under complex working conditions. Utility Model Content

[0004] The battery box and battery provided in the embodiment of the present application connect the brackets of the reinforcement assembly to the box body, thereby improving the overall strength of the battery box to meet the use requirements of the battery box under complex working conditions.

[0005] On the one hand, an embodiment of the present application provides a battery box, including: a box body, including a bottom plate and multiple side plates that enclose a accommodating cavity; a reinforcement component, arranged on the box body, the reinforcement component includes multiple brackets, the multiple brackets include a first bracket, a second bracket and a third bracket, the first bracket and the second bracket are located in the accommodating cavity, the first bracket and the second bracket overlap at the side plate and form a lap joint, the third bracket is arranged outside the accommodating cavity, and the third bracket is connected to the lap joint via the side plate.

[0006] According to any embodiment of the aforementioned first aspect of the present application, the multiple side panels include a first side panel arranged opposite to each other along a first direction and a second side panel arranged opposite to each other along a second direction, and the first direction intersects with the second direction; the first bracket is arranged on the bottom plate, the second bracket and the third bracket are arranged opposite to each other on both sides of the first side panel along the first direction, and the first bracket extends at least partially from the bottom plate to the first side panel and overlaps with the second bracket.

[0007] According to any embodiment of the aforementioned first aspect of the present application, the second brackets are arranged in pairs along the first direction on the inner wall surfaces of the first side panels on both sides, the first brackets extend along the first direction, and the two ends are respectively connected to the second brackets and form overlapping portions; the third brackets are arranged in pairs along the first direction on the outer wall surfaces of the first side panels on both sides, and the paired third brackets are respectively connected to the overlapping portions via the first side panels.

[0008] According to any embodiment of the aforementioned first aspect of the present application, the first bracket includes two or more sub-brackets spaced apart along the second direction, and each sub-bracket extends along the first direction and overlaps with the second bracket.

[0009] According to any embodiment of the aforementioned first aspect of the present application, among the two or more sub-brackets, at least one sub-bracket is located at the junction area between the second side plate and the bottom plate and is connected to the second side plate.

[0010] According to any embodiment of the aforementioned first aspect of the present application, the third bracket is extended along the second direction, and in the first direction, the orthographic projection of the third bracket on the first side panel covers the overlapping portions formed by each sub-bracket and the second bracket.

[0011] According to any embodiment of the aforementioned first aspect of the present application, the second bracket at least partially extends from the first side plate to the bottom plate, and is disposed between two adjacent sub-brackets along the second direction.

[0012] According to any embodiment of the aforementioned first aspect of the present application, the reinforcement assembly also includes a fourth bracket, which is arranged in the accommodating cavity, and one end of the fourth bracket is connected to the side panel, and the other end is connected to the second bracket.

[0013] According to any embodiment of the aforementioned first aspect of the present application, two adjacent side panels are welded together, and the battery box body further includes an adhesive, which is filled in the weld between the two adjacent side panels.

[0014] A second aspect of the present application provides a battery, including the battery box in the above embodiment.

[0015] The battery case provided in the embodiment of the present application includes a case body and a reinforcing assembly, so as to improve the overall strength of the battery case through the reinforcing assembly. Specifically, the reinforcing assembly includes a first bracket, a second bracket and a third bracket. The third bracket is located outside the accommodating cavity and is connected to the first bracket and the second bracket located in the accommodating cavity via a side plate. That is, each bracket of the reinforcing assembly is connected to the case body. When any bracket is subjected to force, the force can be dispersed through other brackets and the case body, thereby reducing the risk of damage to the battery case when it is squeezed or collided, so as to meet the use requirements of the battery case under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic structural diagram of a battery box at an angle provided in an embodiment of the present application;

[0018] Figure 2 is a schematic structural diagram of a battery box from another angle provided in an embodiment of the present application;

[0019] Figure 3 It is a schematic diagram of welding the side plate and the reinforcement assembly of the battery box provided in an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the structure of a reinforcement assembly provided in an embodiment of the present application;

[0021] Figure 5 is a partial enlarged view of the battery box provided in the embodiment of the present application;

[0022] Figure 6 is a schematic structural diagram of a second bracket provided in an embodiment of the present application;

[0023] Figure 7 is a structural schematic diagram of a battery box provided in an embodiment of the present application from another angle;

[0024] Figure 8 It is an exploded diagram of the battery provided in the embodiment of the present application.

[0025] Description of reference numerals:

[0026] 100, battery; 10, lower box; 20, upper box; 30, electrical components; 40, sealing member;

[0027] 1. Box body; 11. Bottom plate; 12. Side plate; 121. First side plate; 122. Second side plate;

[0028] 2. Reinforcement assembly; 21. First bracket; 211. Sub-bracket; 22. Second bracket; 23. Third bracket; 24. Fourth bracket; 3. Adhesive;

[0029] S, accommodating cavity; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0030] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0031] In the description of the present application, it should be noted that, unless otherwise specified, "plurality" means more than two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In order to better understand this application, Figures 1 to 8 The battery box and the battery of the embodiment of the present application are further described.

[0034] See also Figures 1 to 3 The embodiment of the present application provides a battery box, including a box body 1 and a reinforcement assembly 2, the box body 1 includes a bottom plate 11 and multiple side plates 12 enclosing a storage cavity S, the reinforcement assembly 2 is arranged on the box body 1, the reinforcement assembly 2 includes multiple brackets, the multiple brackets include a first bracket 21, a second bracket 22 and a third bracket 23, the first bracket 21 and the second bracket 22 are located in the storage cavity S, the first bracket 21 and the second bracket 22 overlap at the side plate 12 and form a lap joint, the third bracket 23 is arranged outside the storage cavity S, and the third bracket 23 is connected to the lap joint via the side plate 12.

[0035] The battery case in the embodiment of the present application includes a case body 1 and a reinforcing assembly 2, so as to improve the overall strength of the battery case through the reinforcing assembly 2. Specifically, the reinforcing assembly 2 includes a first bracket 21, a second bracket 22 and a third bracket 23. The third bracket 23 is located outside the accommodating cavity S and is connected to the first bracket 21 and the second bracket 22 located in the accommodating cavity S via the side plate 12. That is, each bracket of the reinforcing assembly 2 is connected to the case body 1. When any bracket is subjected to force, the force can be dispersed through other brackets and the case body 1, thereby reducing the risk of damage to the battery case when it is squeezed or collided, so as to meet the use requirements of the battery case under complex working conditions.

[0036] In addition, compared with the structural form of only setting the bracket inside the accommodating cavity S, the present application also sets a bracket outside the accommodating cavity S, and the inner and outer brackets are connected via the box body 1, which can further increase the reliability of the connection between the reinforcement component 2 and the box body 1 and facilitate the transmission of force.

[0037] It can be understood that the third bracket 23 is connected to the overlapped portion via the side plate 12, including welding the third bracket 23, the side plate 12 and the overlapped portion by three or four layers of resistance welding, or the side plate 12 is provided with a connection hole, and the battery box body further includes a bolt, the bolt passes through the connection hole, and connects the third bracket 23 to the overlapped portion. Therefore, the third bracket 23, the box body 1 and the overlapped portion can be connected to form a whole by bolt connection or welding, which has a simple structure, reduces the number of parts of the battery box body, and saves assembly costs.

[0038] See also Figures 1 to 3 In some optional embodiments, the plurality of side panels 12 include first side panels 121 that are relatively arranged along a first direction X and second side panels 122 that are relatively arranged along a second direction Y, the first direction X intersects with the second direction Y, the first bracket 21 is arranged on the bottom plate 11, the second bracket 22 and the third bracket 23 are arranged on a first side panel 121, the first bracket 21 at least partially extends from the bottom plate 11 to the first side panel 121 and overlaps with the second bracket 22.

[0039] Among them, by separately arranging the first bracket 21 and the second bracket 22 on the bottom plate 11 and the side plate 12, the bottom plate 11 and the side plate 12 can be reinforced respectively, and the first bracket 21 and the second bracket 22 are connected so that the bottom plate 11, the side plate 12 and the reinforcing component 2 form a whole, which can greatly improve the overall strength of the battery box, so that the battery box can better resist mechanical impact and extrusion, thereby improving the reliability of the battery box.

[0040] In some optional embodiments, the second brackets 22 are arranged in pairs on the inner wall surfaces of the first side plates 121 on both sides along the first direction X, the first brackets 21 extend along the first direction X, and the two ends are respectively connected to the second brackets 22 to form overlapping portions, and the third brackets 23 are arranged in pairs on the outer wall surfaces of the first side plates 121 on both sides along the first direction X, and the paired third brackets 23 are respectively connected to the overlapping portions via the first side plates 121.

[0041] By arranging the second bracket 22 and the third bracket 23 on the first side plates 121 on both sides, the structural strength of the first side plates 121 is improved, and the second bracket 22 and the third bracket 23 on both sides are connected by the first bracket 21, so that a force transmission path along the first direction X can be formed, thereby improving the strength and load-bearing capacity of each area of ​​the battery box, and further improving the reliability of the battery box.

[0042] See also Figures 1 to 4 In some optional embodiments, the first bracket 21 includes two or more sub-brackets 211 spaced apart along the second direction Y, each sub-bracket 211 extending along the first direction X and overlapping the second bracket 22. By providing a plurality of sub-brackets 211, the structural strength of the bottom plate 11 can be increased, and a plurality of connection points can be formed between the first bracket 21 and the second bracket 22, which is more convenient for uniform transmission of the force.

[0043] Furthermore, among the more than two sub-brackets 211, at least one sub-bracket 211 is located at the junction area between the second side panel 122 and the bottom plate 11 and is connected to the inner wall surface of the second side panel 122, that is, at least one sub-bracket 211 is connected to the second bracket 22 on the first side panel 121 while also being connected to the second side panel 122, so that the sub-bracket 211 simultaneously overlaps the first side panel 121 and the second side panel 122 of the box body 1 to strengthen the strength of the corners formed by the first side panel 121 and the second side panel 122, so as to reduce the risk of damage to the corners of the battery box.

[0044] Optionally, each bracket may include a connected bracket body and a flange, and a bracket may be connected to another bracket and / or the box body 1 through the flange. For example, the first bracket 21 may be connected to the second bracket 22 and the second side plate 122 through the flange, so as to facilitate the preparation and connection of each bracket, and the bracket body may be arched relative to the flange, for example, the bracket body of the first bracket 21 may be arched upward relative to the bottom plate 11, so as to improve the bearing effect of the first bracket 21 itself and further improve the anti-extrusion ability of the battery box. In addition, a weight-reducing hole may be opened on the bracket body to reduce the weight of the bracket and facilitate the application of the battery box.

[0045] To further improve the strength of the battery corners, in some optional embodiments, when the number of sub-brackets 211 is two, the two sub-brackets 211 can be respectively arranged at the two ends of the bottom plate 11 along the second direction Y, and connected to the inner wall surfaces of the second side plates 122 on both sides. When the number of sub-brackets 211 is three or more, the sub-brackets 211 located at both ends of the multiple sub-brackets 211 can be connected to the second side plates 122, thereby improving the strength of the corners of the battery box through the sub-brackets 211 at both ends, so as to further reduce the risk of damage to the corners of the battery box.

[0046] In some optional embodiments, the third bracket 23 extends along the second direction Y and is connected to the outer wall surface of the second side panel 122. By extending the third bracket 23 along the second direction Y, on the one hand, the third bracket 23 can be connected to each overlapping portion at the same time, and on the other hand, the third bracket 23 can also be connected to the first side panel 121 and the second side panel 122 at the same time, thereby further enhancing the strength of the corners formed by the first side panel 121 and the second side panel 122 to ensure the reliability of the battery box under complex working conditions.

[0047] Optionally, the battery box can be formed by bending and welding, that is, the battery box is configured as a bending and welding box, which can save costs, is more sturdy, and has the characteristics of high strength compared to conventional battery stamping boxes.

[0048] See also Figure 5 In some optional embodiments, two adjacent side panels 12 are welded together, and the battery case further includes an adhesive 3, which is filled in the weld between the two adjacent side panels 12, that is, a gluing process is added to the weld in the boundary area of ​​the two adjacent side panels 12 of the battery case to reduce the risk of cracking or gaps caused by pulling of the welds of the two side panels 12 after the battery case is subjected to mechanical impact, extrusion or collision, further improve the edge strength, and ensure the sealing of the battery case.

[0049] Optionally, the adhesive 3 can be set as a structural adhesive or a sealant, which has a short gel time and is firmly bonded and not easy to fall off, so as to ensure the connection and sealing between the side panels 12 of the large-sized battery box. In addition, to facilitate gluing, each bracket of the reinforcing component 2 can be set at a certain distance from the gluing place, or a groove can be opened on the bracket to ensure the gluing space.

[0050] See also Figure 6 and Figure 7 Since the reinforcement component 2 includes multiple brackets and the battery has a high precision requirement, in order to improve the installation accuracy of the brackets, in some optional embodiments, the second bracket 22 extends at least partially from the first side plate 121 to the bottom plate 11, and is disposed between two adjacent sub-brackets 211 along the second direction Y.

[0051] It can be understood that the flange of the second bracket 22 can be extended to the bottom plate. On the one hand, the second bracket 22 can be connected to the first side plate 121 and the bottom plate 11 at the same time, that is, the first bracket 21, the second bracket 22 and the third bracket 23 are all connected to the two surfaces of the box body 1, which further improves the structural strength of the corners of the battery box and facilitates the transmission of force. On the other hand, the second bracket 22 can also limit the freedom of each sub-bracket 211 along the second direction Y, so that when each bracket is installed, they can be installed and positioned with each other, which is more convenient for installation and improves installation accuracy.

[0052] For ease of description, taking the case where the number of sub-brackets 211 is three or more as an example, the sub-brackets 211 located at both ends are defined as first sub-brackets, and the sub-bracket 211 located in the middle is defined as second sub-brackets.

[0053] Among them, when installing the reinforcement component 2 in the accommodating cavity S of the box body 1, the following steps can be followed: install the first sub-bracket in the boundary area between the bottom plate 11 and the second side plate 122; use the first sub-bracket as the installation reference of the second bracket 22, and install the second bracket 22 on the first side plate 121; use the second bracket 22 as the installation reference of the second sub-bracket, and install the second sub-bracket on the bottom plate 11, thereby realizing the installation and fixation of multiple brackets in the box body 1.

[0054] It can be understood that since the third bracket 23 is arranged outside the accommodating cavity S, the installation reference of the third bracket 23 can be set to the box body 1, and the third bracket 23 can be installed separately from the first bracket 21 and the second bracket 22. It can be achieved that after the first bracket 21, the second bracket 22 and the third bracket 23 are installed, the third bracket 23 can be fixed to the first bracket 21 and the second bracket 22 via the first side panel 121.

[0055] See also Figures 1 to 7 In some optional embodiments, the reinforcement assembly 2 further includes a fourth bracket 24, which is disposed in the accommodating cavity S, one end of which is connected to the side plate 12, and the other end of which is connected to the second bracket 22. Since the battery box is used to accommodate a variety of electrical components, the fourth bracket 24 can be additionally provided in the accommodating cavity S to meet the installation requirements of a variety of electrical components, and the fourth bracket 24 is connected to the second bracket 22 through the flange, so that the brackets of the reinforcement assembly 2 can be connected to each other to form a whole, which is more convenient for force transmission to ensure the use of the battery box under complex working conditions.

[0056] Optionally, the second bracket 22 may be provided with a docking groove, which is compatible with the fourth bracket 24, so that the second bracket 22 can be used as the installation reference of the fourth bracket 24, and the fourth bracket 24 can be installed on the second bracket 22, thereby achieving the installation and fixation of each bracket.

[0057] See also Figure 8 The embodiment of the present application also provides a battery 100, including the battery case and the electrical component 30 in the above embodiment, the electrical component 30 is arranged in the accommodating cavity S of the battery case and supported on the reinforcing component 2.

[0058] Since the battery includes the battery case in the above-mentioned embodiment, the battery 100 has the beneficial effects of the battery case in the above-mentioned embodiment, and can effectively resist mechanical impact, extrusion and collision through the battery case, and has sufficient strength to ensure the long-term and reliable sealing of the battery case under complex working conditions, thereby ensuring the safety of the electrical components 30 and improving the service life of the battery 100.

[0059] Optionally, the electrical component 30 can be configured as a battery cell module, a domain controller, and a battery management system slave board, a wiring harness, and other electrical parts.

[0060] It can be understood that the battery 100 often includes a lower box body 10 and an upper box body 20 that is snapped onto the lower box body 10. The battery box body in the embodiment of the present application can be set as the upper box body 20 or the lower box body 10, and its specific setting position can be adjusted according to the strength level of the battery 100.

[0061] Optionally, the battery 100 further includes a seal 40 , and the upper box body 20 and the lower box body 10 are sealed by the seal 40 to further improve the sealing performance of the battery 100 .

[0062] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0063] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0064] It should be understood that in the embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0065] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A battery box, characterized in that: include: The box body comprises a bottom plate and a plurality of side plates which enclose a receiving cavity; A reinforcement component is arranged on the box body, and the reinforcement component includes a plurality of brackets, and the plurality of brackets include a first bracket, a second bracket and a third bracket. The first bracket and the second bracket are located in the accommodating cavity, and the first bracket and the second bracket overlap at the side panel to form a lap joint. The third bracket is arranged outside the accommodating cavity, and the third bracket is connected to the lap joint via the side panel.

2. The battery box according to claim 1, characterized in that: The plurality of side panels include first side panels arranged opposite to each other along a first direction and second side panels arranged opposite to each other along a second direction, wherein the first direction intersects with the second direction; The first bracket is disposed on the bottom plate, the second bracket and the third bracket are disposed on the first side plate, and the first bracket at least partially extends from the bottom plate to the first side plate and overlaps with the second bracket.

3. The battery box according to claim 2, characterized in that: The second brackets are arranged in pairs on the inner wall surfaces of the first side plates at both sides along the first direction, the first brackets extend along the first direction, and both ends of the first brackets are respectively connected to the second brackets to form overlapping portions; The third brackets are arranged in pairs on the outer wall surfaces of the first side plates at both sides along the first direction, and the paired third brackets are respectively connected to the overlapping portions via the first side plates.

4. The battery box according to claim 2, characterized in that: The first bracket includes two or more sub-brackets spaced apart along the second direction, and each of the sub-brackets extends along the first direction and overlaps with the second bracket.

5. The battery box according to claim 4, characterized in that: Among the two or more sub-brackets, at least one sub-bracket is located at a junction area between the second side plate and the bottom plate and is connected to an inner wall surface of the second side plate.

6. The battery case according to claim 4, characterized in that: The third bracket is extended along the second direction and connected to the outer wall surface of the second side plate.

7. The battery case according to claim 4, characterized in that: The second bracket at least partially extends from the first side plate to the bottom plate, and is disposed between two adjacent sub-brackets along the second direction.

8. The battery box according to claim 1, characterized in that: The reinforcement assembly also includes a fourth bracket, which is disposed in the accommodating cavity, one end of the fourth bracket is connected to the side plate, and the other end of the fourth bracket is connected to the second bracket.

9. The battery box according to claim 1, characterized in that: Two adjacent side plates are welded together, and the battery box body also includes adhesive glue, which is filled in the weld between the two adjacent side plates.

10. A battery, characterized in that: A battery case comprising the battery case according to any one of claims 1 to 9.

Images