Lower shell and battery

Abstract

The utility model provides a lower shell and a battery, and belongs to the technical field of energy storage batteries. The lower shell part comprises a lower shell body and a cross beam. According to the lower shell provided by the utility model, the plurality of grooves are formed in the cross beam, and the grooves of the cross beam are welded with the lower shell body, so that the original continuous welding of the cross beam and the lower shell body is changed into discontinuous welding; by controlling the welding length between the cross beam and the lower shell body and changing the welding mode between the cross beam and the lower shell body, the problems that in the prior art, when the cross beam is welded, a lower shell deforms, and a bottom plate is burnt through are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage batteries, and particularly relates to a lower housing and a battery. Background Art

[0002] At present, in the energy storage industry, the energy storage pack consists of several parts including a single battery module, an electrical system, a thermal management system, a housing, and a BMS (Battery Management System).

[0003] The housing of the energy storage pack can be divided into an upper housing and a lower housing. Among them, the structure of the lower housing can be mainly divided into a liquid cooling plate, liquid cooling pipes, a cross beam of the lower housing, and a bottom plate, etc. The liquid cooling plate can exchange heat through liquid cooling to avoid temperature rise. The cross beam of the lower housing can fix the battery module on the lower housing through bolts to prevent the battery module from shaking and moving, thus avoiding the risk of explosion.

[0004] In the prior art, the cross beam in the lower housing module is generally a whole long strip-shaped cross beam column. When the designed cross beam has too large a cross-sectional area, the lower housing needs to be welded to the cross beam. However, when continuously welding the cross beam, it is easy to cause the deformation of the lower housing and the problem of burning through the bottom plate. Summary of the Utility Model

[0005] The embodiment of the utility model provides a lower housing and a battery, aiming at solving the problems of deformation of the lower housing and burning through the bottom plate when welding the cross beam in the prior art.

[0006] In a first aspect, the embodiment of the utility model provides a lower housing, including a lower housing body and a cross beam. The cross beam is fixedly arranged on the lower housing body, and the cross beam is provided with a plurality of grooves.

[0007] In a possible implementation manner, the cross beam has a weight-reducing cavity.

[0008] In a possible implementation manner, the cross beam is provided with a plurality of bolt holes.

[0009] In a possible implementation manner, the lower housing body includes side beams and a bottom plate. The side beams surround the upper outer peripheral side of the bottom plate. The cross beam is arranged on the bottom plate, and both ends of the cross beam are connected to the side beams.

[0010] In a possible implementation manner, both the side beams and the bottom plate are of hollow structures.

[0011] In a possible implementation manner, the side beams include a front side beam, a rear side beam, a left side beam, and a right side beam. A longitudinal beam is arranged between the front side beam and the cross beam.

[0012] In a possible implementation, the front side beam is provided with a first hollow chamber, the bottom plate is provided with a second hollow chamber, and the rear side beam is provided with a third hollow chamber. The first hollow chamber, the second hollow chamber, and the third hollow chamber are communicated in sequence. An inlet and an outlet are provided on the front side beam, and the inlet and the outlet are respectively used for communicating with a liquid cooling pipeline.

[0013] In a possible implementation, there are multiple cross beams.

[0014] In a possible implementation, hoisting holes are provided at the ends of the left side beam and the right side beam.

[0015] In a second aspect, an embodiment of the present invention further provides a battery. A battery includes the lower housing described in the above embodiment.

[0016] In the solution shown in the embodiments of the present application, compared with the prior art, by providing multiple grooves on the cross beam and welding the groove part of the cross beam to the lower housing body, the original continuous welding between the cross beam and the lower housing body is changed to intermittent welding. By controlling the welding length between the cross beam and the lower housing body and changing the welding form between the cross beam and the lower housing body, the problems of deformation of the lower housing and burning through of the bottom plate during welding of the cross beam in the prior art are solved. Description of the Drawings

[0017] Figure 1 It is a top view of the lower housing provided by an embodiment of the present invention;

[0018] Figure 2 It is a three-dimensional structure schematic diagram of the lower housing provided by an embodiment of the present invention;

[0019] Figure 3 It is a three-dimensional structure schematic diagram of the cross beam provided by an embodiment of the present invention Figure 1 ;

[0020] Figure 4 It is a three-dimensional structure schematic diagram of the cross beam provided by an embodiment of the present invention Figure 2 ;

[0021] Figure 5 It is a three-dimensional structure schematic diagram of the longitudinal beam provided by an embodiment of the present invention;

[0022] Figure 6 It is Figure 2 a partial enlarged view of area A in

[0023] Description of the Reference Numerals:

[0024] 1. Lower housing body; 11. Bottom plate; 12. Side beam; 2. Cross beam; 21. Groove; 22. Weight reduction cavity; 23. Bolt hole; 120. Front side beam; 121. Water inlet; 122. Water outlet; 13. Rear side beam; 14. Left side beam; 15. Right side beam; 16. Notch; 17. Bolt mounting hole; 3. Longitudinal beam; 4. Lifting hole. Detailed implementation mode

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] It should be further noted that the drawings and embodiments of the present utility model mainly describe and explain the concept of the present utility model. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be completely described. However, on the premise that those skilled in the art understand the concept of the present utility model, those skilled in the art can implement the above specific forms and settings in a well-known manner.

[0027] When an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] The orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 to the present utility model.

[0029] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, and the meaning of "several" is one or more, unless otherwise specifically defined.

[0030] Now, a lower housing and a battery provided by the present utility model will be described.

[0031] In a first aspect, an embodiment of the present utility model provides a lower housing, which includes a lower housing body 1 and a cross beam 2. The cross beam 2 is fixedly arranged on the lower housing body 1, and the cross beam 2 is provided with a plurality of grooves 21.

[0032] Compared with the prior art, in the lower housing provided by this embodiment, by providing a plurality of grooves 21 on the cross beam 2 and welding the groove 21 of the cross beam 2 to the lower housing body 1, the original continuous welding between the cross beam 2 and the lower housing body 1 is changed to intermittent welding. By controlling the welding length between the cross beam 2 and the lower housing body 1 and changing the welding form between the cross beam 2 and the lower housing body 1, the problems of deformation of the lower housing and burning through of the bottom plate 11 during welding of the cross beam 2 in the prior art are solved.

[0033] In some embodiments, the cross beam 2 has a weight reduction cavity 22, and the setting of the weight reduction cavity 22 is used to reduce the self-weight of the cross beam 2 and save materials at the same time.

[0034] In some possible implementation manners, a plurality of bolt holes 23 are provided on the cross beam 2. The battery pack is bolted to the bolt holes 23 on the cross beam 2. The setting of the bolt holes 23 facilitates the installation and disassembly of the battery pack and saves installation nuts at the same time.

[0035] On the basis of the above embodiments, the lower housing body 1 includes a side beam 12 and a bottom plate 11. The side beam 12 surrounds the upper outer peripheral side of the bottom plate 11. The cross beam 2 is arranged on the bottom plate 11, and both ends of the cross beam 2 are connected to the side beam 12.

[0036] Specifically, both the side beam 12 and the bottom plate 11 are hollow structures. The fact that both the side beam 12 and the bottom plate 11 are hollow structures can reduce the self-weight of the lower housing.

[0037] Specifically, a plurality of bolt mounting holes 17 are provided on the side beam 12 to facilitate the installation of the upper housing to the lower housing by bolts.

[0038] In some possible implementation manners, the side beam 12 includes a front side beam 120, a rear side beam 13, a left side beam 14, and a right side beam 15. A longitudinal beam 3 is provided between the front side beam 120 and the cross beam 2. The setting of the longitudinal beam 3 enhances the connection strength between the front side beam 120 and the cross beam 2.

[0039] In some embodiments, the front side beam 120 is provided with a first hollow chamber, the bottom plate 11 is provided with a second hollow chamber, and the rear side beam 13 is provided with a third hollow chamber. The first hollow chamber, the second hollow chamber, and the third hollow chamber are communicated in sequence. An inlet 121 and an outlet 122 are provided on the front side beam 120. The inlet 121 and the outlet 122 are respectively used for communicating with a liquid cooling pipeline. Among them, the second hollow chamber of the bottom plate 11 is divided into two parts: a water inlet chamber and a water outlet chamber.

[0040] The coolant in the liquid cooling pipeline passes through the inlet 121 of the front side beam 120 and successively flows through the first hollow chamber of the front side beam 120, the water inlet chamber of the bottom plate 11, and the third hollow chamber of the rear side beam 13. The coolant flowing through the third hollow chamber finally returns to the liquid cooling pipeline through the water outlet chamber of the bottom plate 11 and the outlet 122 on the front side beam 120. This scheme can cool and circulate the battery pack to avoid potential safety hazards such as spontaneous combustion due to excessive temperature of the battery pack.

[0041] Based on the above embodiments, there are multiple cross beams 2. The setting of multiple cross beams 2 can not only enhance the strength of the lower housing, but also adjust the different distances between the multiple cross beams 2 according to the sizes of different battery packs to meet battery packs of different specifications.

[0042] Further, lifting holes 4 are provided at the ends of the left side beam 14 and the right side beam 15. The setting of the lifting holes 4 facilitates the lifting and transportation of the lower housing.

[0043] Specifically, the lifting hole 4 of the left side beam 14 is communicated with the hollow chamber of the left side beam 14, and the lifting hole 4 of the right side beam 15 is communicated with the hollow chamber of the right side beam 15. When water accumulates and flows into the hollow chamber along the bolt mounting hole 17, since the lifting hole 4 is communicated with the hollow chamber, the accumulated water finally flows out from the hollow chamber of the left side beam 14 or the hollow chamber of the right side beam 15, avoiding water accumulation in the hollow chamber.

[0044] Further, notches 16 are provided on the outer side walls of the left side beam 14 and the right side beam 15. There are at least two notches 16.

[0045] Based on the above embodiments, the bottom plate 11 is connected to the front side beam 120 and the rear side beam 13 by a plug-in connection method.

[0046] In a second aspect, an embodiment of the present invention further provides a battery, and a battery includes the lower housing described in the above embodiments.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lower housing, characterized in that, Comprising: A lower housing body (1), including side beams (12) and a bottom plate (11), the side beams (12) surrounding the upper outer peripheral side of the bottom plate (11); A cross beam (2), the cross beam (2) being provided on the bottom plate (11), and both ends of the cross beam (2) being connected to the side beams (12), the cross beam (2) being provided with a plurality of grooves (21); Wherein, the cross beam (2) and the bottom plate (11) are connected by means of intermittent welding.

2. The lower housing according to claim 1, characterized in that, The cross beam (2) has a weight-reducing cavity (22).

3. The lower housing according to claim 2, characterized in that, A plurality of bolt holes (23) are provided on the cross beam (2).

4. The lower housing according to claim 1, characterized in that, Both the side beams (12) and the bottom plate (11) are of hollow structures.

5. The lower housing according to claim 4, characterized in that, The side beams (12) include a front side beam (120), a rear side beam (13), a left side beam (14), and a right side beam (15), and a longitudinal beam (3) is provided between the front side beam (120) and the cross beam (2).

6. The lower housing according to claim 5, characterized in that, The front side beam (120) is provided with a first hollow chamber, the bottom plate (11) is provided with a second hollow chamber, and the rear side beam (13) is provided with a third hollow chamber. The first hollow chamber, the second hollow chamber, and the third hollow chamber are communicated in sequence. An inlet (121) and an outlet (122) are provided on the front side beam (120), and the inlet (121) and the outlet (122) are respectively used for communicating with a liquid cooling pipeline.

7. The lower housing according to claim 1, characterized in that, There are a plurality of the cross beams (2).

8. The lower housing according to claim 6, characterized in that, Lifting holes (4) are provided at the ends of both the left side beam (14) and the right side beam (15).

9. A battery, characterized in that, Including a lower housing according to any one of claims 1-8.

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