CN209766488U

CN209766488U - Battery module

Info

Publication number: CN209766488U
Application number: CN201920876975.9U
Authority: CN
Inventors: 罗志强; 汤欣平
Original assignee: Hunan Jiusun New Energy Co Ltd
Current assignee: Hunan Jiusun New Energy Co Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2019-12-10
Anticipated expiration: 2029-06-11

Abstract

The utility model provides a battery module, which comprises a battery component, a shell, a sealing plate and a sealing element, wherein the battery component is accommodated in the shell, and pouring sealant is filled in the shell; the sealing plate is provided with an electrode plate for connecting the battery assembly with an external circuit, the first end of the shell is provided with an electrode assembly hole, and the sealing plate is fixed at the position, corresponding to the electrode assembly hole, of the first end and seals the electrode assembly hole; the sealing member is disposed between the sealing plate and the periphery of the electrode assembly hole. The utility model provides a battery module can be under the condition of the restriction of battery appearance overall dimension, and deep under water keep for a long time under the water pressure of dark 50 meters not intake, and the structural seal is firm, safe in utilization.

Description

Battery module

Technical Field

The utility model belongs to the technical field of the electric application under water and specifically relates to a battery module is related to.

Background

With the need for underwater exploration, various underwater electrical applications, such as unmanned submersibles, have come into play. The increasing depth of underwater exploration has led to the increasing demand for batteries in today's miniaturized submersible. Under the condition that the overall size of the battery is only 171 x 60 x 58mm, the energy density is required to reach 158Wh, and the output continuous discharge current is required to reach 55A. Under the conditions of the energy density and the discharge circuit, once the battery equipment enters water, a circuit board and a battery cell inside the battery are short-circuited, the charging and discharging functions are lost, the whole group of battery pack is scrapped, and serious consequences of fire burning appear seriously. Due to the limitation of volume, the existing battery pack structure can not enter water under the water pressure of 30 meters deep underwater, and cannot keep not enter water for a long time under the water pressure of 50 meters deep underwater or more than 0.3 mp.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a waterproof electrical structure subassembly and deep water group battery can keep the not water of longer time under the water pressure of battery module dark 50 meters under water, and the structural seal is firm, safe in utilization.

Specifically, the utility model provides a battery module, including battery pack, casing, closing plate and sealing member, wherein, battery pack accomodates in the inside of casing, the inside of casing is filled with the casting glue; the sealing plate is provided with an electrode plate for connecting the battery assembly with an external circuit, the first end of the shell is provided with an electrode assembly hole, and the sealing plate is fixed at the position, corresponding to the electrode assembly hole, of the first end and seals the electrode assembly hole; the sealing member is disposed between the sealing plate and the periphery of the electrode assembly hole.

Preferably, the first end of the housing is provided with a limiting groove around the electrode assembly hole, and the limiting groove is used for placing the sealing element.

Preferably, the sealing plate is provided with a limiting groove around the electrode plate, and the limiting groove is used for placing the sealing element.

Further, the sealing plate is fixed to the first end of the housing by screws.

Further, the joint between the sealing plate and the shell is coated with a sealing glue.

Further, the second end of the shell is provided with an assembly opening, the battery assembly is placed into the shell through the assembly opening, and the assembly opening is sealed through an end cover of the shell.

Furthermore, the end cover is provided with a first step structure at the position of the circle matched with the second end of the shell, the second end of the shell is provided with a second step structure at the position of the circle matched with the end cover, the first step structure and the second step structure respectively comprise at least two steps, and a sealant is coated between the matching surfaces of the first step structure and the second step structure.

Preferably, the end cover is provided with a vent hole, the vent hole is sealed through a sealing sheet, and the sealing sheet is adhered to the outer side of the end cover through a sealing glue.

Further, the sealing plate is put into the housing through the fitting opening, and the sealing plate is fixed to an inner side of the first end of the housing.

Further, the electrode plate and the sealing plate are integrally formed through an injection molding process, the electrode plate penetrates through two sides of the sealing plate to form a first connecting end located on the inner side of the shell and a second connecting end located on the outer side of the shell, the first connecting end is connected with the battery pack, and the second connecting end is used for being connected with the external circuit.

The utility model provides a battery module can be under the condition of the restriction of battery appearance overall dimension, and deep under water keep for a long time under the water pressure of dark 50 meters not intake, and the structural seal is firm, safe in utilization.

Drawings

Fig. 1 is an overall exploded schematic view of a battery module according to an embodiment of the present invention.

Fig. 2 is a schematic view of a sealing plate structure of a battery module according to an embodiment of the present invention.

Fig. 3 is a schematic view illustrating an electrode plate structure of a battery module according to an embodiment of the present invention.

Fig. 4 is a schematic view of a housing structure of a battery module according to an embodiment of the present invention.

Fig. 5 is a schematic view illustrating a sealing member of a battery module according to an embodiment of the present invention.

Fig. 6 is a schematic view of an assembly structure of the second end of the housing according to an embodiment of the present invention.

Fig. 7 is a schematic view of an end cap structure of a battery module according to an embodiment of the present invention.

Fig. 8 is a schematic view of a sealing sheet structure of a battery module according to an embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Fig. 1 is an overall exploded schematic view of a battery module according to an embodiment of the present invention. As shown in fig. 1, the battery module according to an embodiment includes a case 1, a sealing plate 2, a sealing member 3, and a battery pack 7. The housing 1 includes a first end 14 and a second end 15, wherein the battery assembly 7 is accommodated in the housing 1, and the inside of the housing 1 is filled with a potting adhesive. The sealing plate 2 is formed with an electrode tab 6 for connecting the battery assembly 7 with an external circuit, the first end 14 of the case 1 is provided with an electrode fitting hole 11, the sealing plate 2 is fixed at a position of the first end 14 corresponding to the electrode fitting hole 11 and closes the electrode fitting hole 11, and at this time, the electrode tab 6 is in a connection state with the battery assembly 7. A sealing member 3 such as a rubber packing is provided between the periphery of the electrode fitting hole 11 and the sealing plate 2.

Due to the deep water working environment, the sealing plate 2 needs to adopt materials and processes which have high rigidity on the whole, good dimensional stability, heat resistance, cold resistance and good insulativity and can be used for a long time in harsh chemical and physical environments. In one embodiment, as shown in fig. 2, the sealing plate 2 is made of high-strength plastic and is injection molded with the electrode sheet 6 to form an assembly to ensure the pressure-resistant and anti-seepage performance, and in this embodiment, the electrode sheet 6 includes a positive electrode sheet 63 and a negative electrode sheet 64. Referring to fig. 3, after the electrode tab 6 is integrally formed with the sealing plate 2, the positive electrode tab 63 and the negative electrode tab 64 penetrate through both sides of the sealing plate 2 to form a first connection end 61 located inside the case 1 and a second connection end 62 located outside the case 1, respectively. The first connection terminal 61 is used for connecting with the battery assembly 7 in the housing 1, and the second connection terminal 62 is used for connecting with an external circuit.

As shown in fig. 4, in the present embodiment, the electrode fitting hole 11 includes a first through-hole 111 and a second through-hole 112 corresponding to the positive electrode tab 63 and the negative electrode tab 64, respectively, thereby improving the structural strength of the first end 14. In other embodiments, the electrode mounting hole 11 need not be divided into two parts, and can accommodate both positive and negative electrodes.

In one embodiment, referring to fig. 4 and 5, in order to prevent the sealing element 3 from sliding, a limiting groove 12 having a size and shape corresponding to the sealing element 3 is disposed around the electrode mounting hole 11 at the first end 14 of the housing 1, i.e. around the first through hole 111 and the second through hole 112. In one embodiment, the sealing plate 2 is installed from the outside of the housing 1, and the stopper groove 12 is provided at the outside of the housing 1. In another embodiment, the sealing plate 2 is installed from the inside of the housing 1, and the stopper groove 12 is provided at the inside of the housing 1. As shown in fig. 2, a stopper groove 22 having a size and shape corresponding to the sealing member 3 is provided around the electrode tab 6, that is, around the positive electrode tab 63 and the negative electrode tab 64 on the side of the mating surface of the sealing plate 2 with the case 1. The position of the sealing element 3 is limited in this way, and no lateral displacement occurs, so that a better sealing effect is achieved.

In one embodiment, as shown in fig. 4, ten screw holes 13 are uniformly formed on one circle of the periphery of the electrode mounting hole 11 of the housing 1. As shown in fig. 2, ten screw holes 21 are uniformly formed at a position corresponding to one turn of the edge of the sealing plate 2. The sealing plate 2 is secured to the first end 14 of the housing 1 by ten screws and is pressed against the sealing member 3. Before the screw fastening, a layer of sealant (with a bonding strength of 10Mpa, the same applies hereinafter) is applied to the joint between the sealing plate 2 and the housing 1, particularly to the screw holes 13 and 21, and the edge of the sealing plate 2 to further seal the gap, and after the screw fastening, the sealant is squeezed to further fill the gap, thereby ensuring the sealing property. In one embodiment, the screw holes 13 on the housing 1 are through holes. In another embodiment, the screw hole 13 of the housing 1 may be a non-through hole, and the sealing plate 2 can be mounted only on the side of the housing 1 where the screw hole 13 is opened.

In one embodiment, the second end 15 of the housing 1 is a closed end, and the screw hole 13 and the limiting groove 12 on the housing 1 are disposed on the outer side of the housing 1. By reasonably designing the size and shape of the electrode assembly hole 11 of the first end 14, for example, the electrode assembly hole 11 is made large enough and not divided into two through holes, so that the battery assembly 7 can be loaded from the electrode assembly hole 11 of the first end 14 of the casing 1, then the first end 14 of the casing 1 faces upwards, the potting adhesive fills the space in the casing 1, and the air in the casing 1 is fully discharged through the electrode assembly hole 11 or the screw hole 13 of the through hole. The pouring sealant is liquid before being cured and has fluidity. Before the potting compound is cured, the sealing member 3 is pressed by the sealing plate 2 to connect the first connection end 61 of the electrode tab 6 with the battery assembly 7 in the case 1, and then the sealing plate 2 and the sealing member 3 are fixed to the case 1 by screws to seal the electrode fitting hole 11. And then, keeping a proper temperature and humidity condition and placing for a proper time to wait for the curing of the potting adhesive so as to keep the hardness of the shell 1 and prevent water from entering the shell due to deformation caused by insufficient strength of the shell 1 in a deep water high-pressure environment in a working environment. The cured pouring sealant and the shell 1 form a dual connection relationship of bonding and mechanical connection, and meanwhile, heat generated by the battery assembly 7 in a large-current discharging process is quickly conducted, so that reliable work of a circuit is guaranteed. In one embodiment, the pouring sealant is an organic silicon pouring sealant, and has the advantages of high corrosion resistance, high insulation, heat conduction, shock resistance and high stability. In other embodiments, the potting adhesive may also be an epoxy potting adhesive or a polyurethane potting adhesive. In addition, the battery module of this embodiment is with integrative the setting of electrode slice 6 on closing plate 2 to seal between sealed glue and sealing member 3 and casing 1, directly set up electrode slice 6 and casing 1 an organic whole relatively, can effectively increase the ability of resistance to deformation when guaranteeing the leakproofness, reduce the probability that electrode slice 6 department warp into water, waterproof performance is better.

In another embodiment, as please refer to fig. 1 and fig. 6, the second end 15 of the housing 1 is provided with an assembling opening, and the screw hole 13 and the limiting groove 12 on the housing 1 are disposed on the inner side of the housing 1. The battery assembly 7 is placed into the case 1 through the assembly opening, which is sealed by the end cap 4 of the case 1, for installation. In this embodiment, the limiting groove 12 of the housing 1 is disposed inside the first end 14, the sealing member 3 is first placed in the limiting groove 12 through the mounting opening of the second end 15 of the housing 1, the edge of the sealing plate 2 and the screw hole 21 are coated with the sealant, and then the sealing member 3 is placed in the housing 1 through the mounting opening of the second end 15 of the housing 1, and is fixed and pressed by the screw to seal the electrode mounting hole 11 of the first end 14 of the housing 1. Then, after the battery assembly 7 is placed and the battery assembly 7 is connected with the first connecting end 61 of the electrode plate 6, the second end 15 of the shell 1 faces upwards, pouring the potting adhesive to the deepest connecting position of the end cover 4, fully discharging air in the gap in the shell 1, and then keeping the proper temperature and humidity conditions and placing for a proper time to wait for the potting adhesive to be solidified. After the potting compound is cured, the fitting opening of the second end 15 of the housing 1 is sealed using the end cap 4. The potting adhesive, when cured, may also serve to seal the first end 14.

In one embodiment, as shown in fig. 7, the end cap 4 is provided with a first step structure at a circle at a position where the end cap is matched with the second end 15 of the shell 1, as shown in fig. 6, the second end 15 of the shell 1 is provided with a second step structure at a circle at a position where the end cap 4 is matched with the end cap, the first step structure comprises two steps of a first step 41 and a second step 42, and correspondingly, the second step structure also comprises two steps of a first step 151 and a second step 152. In another embodiment, the first step structure and the second step structure comprise only one step. In other embodiments, the first step structure and the second step structure each comprise at least three steps to further secure the seal. And a sealant is coated between the matching surfaces of the first step structure and the second step structure for further sealing. When pouring the pouring sealant, the pouring sealant is poured into the second step structure at the assembly opening so as to reserve the assembly position of the end cover 4.

When assembling the end cap 4 to seal the assembly opening, the air in the second step structure of the housing 1 cannot be exhausted, which may result in the failure of assembling in place. In one embodiment, as shown in fig. 7, the bottom surface of the end cap 4 is provided with a vent hole 43, and when the end cap 4 is assembled, the air inside can be discharged through the vent hole 43. After the end cover 4 is assembled, the vent hole 43 is sealed by the sealing sheet 5, as shown in fig. 8, the sealing sheet 5 is a sheet structure which is matched with the end cover 4 in shape and has an area enough to cover the vent hole 43, the sealing sheet 5 is adhered to the outer side of the end cover 4 by a sealant to seal the vent hole 43 after the assembly is completed, and water is prevented from permeating from the vent hole by the adhesive adhesion strength of the sealant. In another embodiment, the vent hole 43 of the end cap 4 is surrounded by a groove 44 corresponding to the outer dimension of the sealing plate 5 to receive and retain the sealing plate 5.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any person skilled in the art can make some modifications or modifications to the equivalent embodiments with equivalent changes without departing from the scope of the present invention, but any modifications, equivalent changes or decorations made to the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A battery module is characterized by comprising a battery component, a shell, a sealing plate and a sealing element, wherein the battery component is accommodated in the shell, and pouring sealant is filled in the shell; the sealing plate is provided with an electrode plate for connecting the battery assembly with an external circuit, the first end of the shell is provided with an electrode assembly hole, and the sealing plate is fixed at the position, corresponding to the electrode assembly hole, of the first end and seals the electrode assembly hole; the sealing member is disposed between the sealing plate and the periphery of the electrode assembly hole.

2. The battery module according to claim 1, wherein the first end of the case is provided with a stopper groove around the electrode mounting hole, the stopper groove being used to receive the sealing member.

3. The battery module according to claim 1, wherein the sealing plate is provided with a stopper groove around the electrode tab, the stopper groove being for seating the sealing member.

4. The battery module according to claim 1, wherein the sealing plate is fixed to the first end of the case by a screw.

5. The battery module according to claim 1 or 4, wherein the junction between the sealing plate and the case is coated with a sealant.

6. The battery module of claim 1, wherein the second end of the housing is provided with a mounting opening through which the battery assembly is placed into the housing, the mounting opening being sealed by an end cap of the housing.

7. The battery module of claim 6, wherein the end cap is provided with a first step structure around the end cap at a position where the end cap is engaged with the second end of the housing, the second end of the housing is provided with a second step structure around the end cap at a position where the end cap is engaged, the first step structure and the second step structure each comprise at least two steps, and a sealant is applied between the engaging surfaces of the first step structure and the second step structure.

8. The battery module according to claim 6 or 7, wherein the end cap is provided with a vent hole, the vent hole is sealed by a sealing sheet, and the sealing sheet is adhered to the outer side of the end cap by a sealing adhesive.

9. The battery module according to claim 6, wherein the sealing plate is put into the case through the fitting opening, and the sealing plate is fixed to an inner side of the first end of the case.

10. The battery module according to claim 1, wherein the electrode tabs are integrally formed with the sealing plate through an injection molding process, the electrode tabs penetrate through both sides of the sealing plate to form a first connection end located inside the case and a second connection end located outside the case, the first connection end being connected to the battery module, and the second connection end being used for connecting to the external circuit.