CN219457824U - Spliced battery module insulating shell and battery module - Google Patents

Abstract

The utility model provides a spliced battery module insulating shell and a battery module, which mainly solve the problem of poor safety of the traditional battery module. The insulating shell comprises a first cover plate, a second cover plate and an intermediate cylinder; the middle cylinder is an extrusion molding piece and can be adapted to battery modules with different lengths; the first cover plate and the second cover plate are arranged at the open ends of the two sides of the middle cylinder and are detachably connected with the middle cylinder to form a battery module accommodating bin. The insulating shell not only can protect and insulate the battery module and avoid the battery module from generating short circuit, but also can avoid external damage such as impact, vibration, falling and the like. In addition, the insulating shell is an extrusion molding part, and the length of the insulating shell can be adjusted according to the number of batteries in the battery module, so that the battery module structure can be flexibly combined, and the insulating shell is suitable for different capacity requirements.

Description

Spliced battery module insulating shell and battery module

Technical Field

The utility model belongs to the field of batteries, and particularly relates to a spliced battery module insulating shell and a battery module.

Background

Lithium ion batteries are mainly divided into three categories, namely square, cylindrical and soft package. The conventional square battery has high packaging reliability, high energy density, simple structure and convenient expansion, and is an important means for improving the energy density by improving the single capacity at present, so that the conventional square battery can be assembled into a battery module, and the battery module can be applied to various fields such as energy storage, power batteries and the like. Because the soft package battery has a plurality of advantages such as security performance is good, light in weight, internal resistance is little, cycle performance is good, so can place square battery in the battery casing after a plurality of soft package batteries are parallelly connected, assemble into the battery module with a plurality of square batteries afterwards to with battery module application in a plurality of fields such as energy storage, power battery.

Chinese patent CN217468659U discloses a highly integrated battery module, which comprises a plurality of battery cell modules, an electrical connection row, a connection module and a battery management module for monitoring battery data; the battery cell module is provided with a groove, and a positive pole and a negative pole are arranged in the groove; the connecting module is placed in the groove and comprises a connecting row carrier for loading the electric connecting row and a cover piece connected with the connecting row carrier in a covering mode; the battery management module is fixed on the cover piece and is electrically connected with the positive pole and the negative pole. Through with battery core module's positive, negative pole post, connection module and battery management module all set up in the recess, improved the space utilization of battery in the direction of height, moreover, through fixing battery management module on the lid to with each battery module's positive, negative pole post electricity is connected, thereby avoided using too much low pressure to gather the pencil, improved battery module's space utilization and degree of integrating.

The battery module improves the space utilization rate and the integration degree through the connecting module, but batteries in the battery module are exposed in the use environment, if vibration, impact, collision and the like exist in the use environment, the battery module can be damaged, the performance of the battery pack is further affected, and potential safety hazards are generated when serious. In addition, the battery is exposed in the use environment, and is easy to contact with other conductors or charged bodies in the external environment to cause the problems of poor insulation, short circuit and the like, and potential safety hazards can also be generated.

Disclosure of Invention

In order to solve the problem of poor safety of the existing battery module, the utility model provides a spliced battery module insulating shell and a battery module.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the spliced battery module insulating shell comprises a first cover plate, a second cover plate and a middle barrel; the middle cylinder body is an extrusion molding piece; the first cover plate and the second cover plate are arranged at the open ends of the two sides of the middle cylinder and are detachably connected with the middle cylinder to form a battery module accommodating bin. The insulating shell not only can protect and insulate the battery in the battery module and avoid hidden danger of short circuit, but also can avoid external damage such as impact, vibration, falling and the like in external environment. In addition, the insulating shell is an extrusion molding part, and the length of the insulating shell can be adjusted according to the number of batteries in the battery module, so that the requirements of different numbers of batteries are met, and the requirements of different capacities of the battery module are further met.

The middle cylinder body can be of an integrated structure or a split structure, preferably of a split structure, and at the moment, the middle cylinder body is mainly formed by surrounding a U-shaped shell and a top plate through a splicing part. The split structure of the intermediate cylinder has the following advantages: after the U-shaped shell is connected with the top plate through the splicing part, the on-site installation and maintenance of the battery module are facilitated, and meanwhile, the middle barrel of the split type structure is relatively simple in process and low in extrusion difficulty relative to the integral type structure, and the manufacturing cost can be reduced.

Still further, above-mentioned U type casing is mainly enclosed by bottom plate and two curb plates through the splice and is closed and form, and this kind of structure makes middle barrel pass through four board splices and forms, and whole insulating casing passes through six board splices and constitutes for whole insulating casing's cost is lower, and the installation is dismantled more conveniently.

For making above-mentioned U type casing and dismantlement, the installation of roof, bottom plate and two blocks of curb plates more convenient and swift, above-mentioned splice includes matched with splice arch and splice groove, splice arch and splice groove's joint cooperation not only simple structure, and the preparation is convenient, still is convenient for on-the-spot installation and dismantlement.

In order to ensure that the connection of the top plate, the bottom plate and the two side plates of the middle cylinder body is more reliable, the tail end of the splicing protrusion is provided with a clamping table with a circular arc-shaped cross section, and the bottom of the splicing groove is provided with a notch with a circular arc-shaped cross section which is matched with the clamping table. After the circular arc clamping table is matched with the circular arc notch in a clamping way, the connection of the spliced parts is more reliable, and each part is not easy to be separated during external vibration, impact and internal explosion.

Furthermore, at least two first supporting parts protruding upwards can be arranged on the upper surface of the bottom of the middle cylinder, the two first supporting parts form a channel, and the channel can be used for placing various auxiliary components such as a explosion venting pipeline, a sharing pipeline, a cooling pipeline and the like, so that the safety, the performance and the like of the battery module are improved; meanwhile, at least one downward bulge, namely a second supporting part for supporting and fixing, can be arranged on the lower surface of the bottom of the middle cylinder body, and the second supporting part is used for stably supporting the whole insulating shell.

In order to facilitate the electrical connection between the bus plate of the battery module and external equipment, the side walls of the middle cylinder in two length directions are provided with through grooves or through holes, and the through grooves or through holes can be strip-shaped through grooves and through holes.

Further, the first cover plate, the second cover plate and the middle cylinder body are of double-layer structures. The double-layer structure insulating shell can improve the rigidity of the whole insulating shell and reduce the deformation of the insulating shell in the manufacturing or using process.

The first cover plate, the second cover plate and the middle cylinder body can be made of PVC, nylon, PP and other materials, preferably PVC is adopted for manufacturing, and the insulating shell made of PVC not only can meet the rigidity requirement, but also can reduce the manufacturing cost.

The utility model also provides a battery module, which comprises a plurality of batteries and any spliced battery module insulating shell, wherein the plurality of batteries are sequentially distributed and are arranged in the spliced battery module insulating shell.

In order to further ensure the stability of the installation of the battery module, the battery module can be connected between the insulating shell and the battery through a locking part, and the locking part can be a screw and the like, so that the insulating shell is fixedly connected with the shell of the battery, and the battery is prevented from shaking or moving in the insulating shell.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

the utility model provides an insulating shell of a spliced battery module, which has certain structural strength, can protect the battery module from external damage such as impact, vibration and drop in the external environment, and can also avoid potential safety hazards to adjacent battery modules or external other equipment when thermal runaway occurs in the battery module.

The insulating shell can safely and reliably insulate the battery module from external equipment or the external environment, avoid the problems of poor insulation or short circuit and the like caused by contact of the pole post or other charged parts of the battery with the external equipment, and can improve the safety of the battery module.

The insulation shell is an extrusion shell, the length of the insulation shell can be adjusted on site according to the length of the battery module, the insulation shell is suitable for battery modules with different lengths, and the selectivity of the number of batteries in the battery module in the insulation shell is increased, so that the insulation shell has higher adaptability and is suitable for different capacity requirements.

The insulating shell is a spliced shell, the spliced shell is simple in structure and easy to assemble, and flexible and rapid assembly can be carried out on site. In addition, the insulating shell of various battery modules can be extruded by a die, and the cost can be greatly reduced during mass production.

The middle cylinder body of the insulating shell is formed by extrusion, so that the sides are free of draft angles, the installation space inside the insulating shell can be effectively utilized after the side plates are spliced to form the whole insulating shell, the waste of the installation space is avoided, and meanwhile, the whole insulating shell has more accurate installation size after the sides are free of the draft angles, and the installation size of an internal battery module is not influenced.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an insulating housing in embodiment 1 of the present utility model;

fig. 2 is a sectional view of an insulating housing in embodiment 1 of the present utility model;

fig. 3 is a schematic structural diagram of a splice in embodiment 1 of the present utility model;

fig. 4 is a schematic structural diagram of an insulating housing in embodiment 2 of the present utility model;

fig. 5 is a sectional view of an insulating housing in embodiment 2 of the present utility model;

fig. 6 is a schematic structural diagram of a splice in embodiment 2 of the present utility model;

fig. 7 is a schematic view showing the structure of a battery module according to embodiment 3 of the present utility model;

fig. 8 is a sectional view of a battery module according to embodiment 3 of the present utility model.

Reference numerals: the novel solar heat collector comprises a 1-middle cylinder, a 2-first cover plate, a 3-second cover plate, a 4-splicing part, a 5-battery, a 6-confluence plate, a 7-heat pipe, an 8-explosion venting pipe, a 9-connecting plate, a 10-locking part, an 11-U-shaped shell, a 12-top plate, a 13-first supporting part, a 14-second supporting part, a 15-through groove or through hole, a 16-channel, a 111-bottom plate, a 112-side plate, a 41-splicing protrusion, a 42-splicing groove, a 411-clamping table and 51-reinforcing rib.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the detailed description. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

The utility model provides a spliced battery module insulating shell which comprises a first cover plate, a second cover plate and a middle cylinder. The insulating shell forms a physical barrier between the external environment and the battery module, so that the influence of external vibration, impact and collision on the battery module can be avoided, and meanwhile, the potential safety hazard of the battery module caused by thermal runaway to the adjacent battery module or other external equipment is avoided. The middle cylinder body of the insulating shell is an extrusion molding part, can be adapted to battery modules with different lengths, and the length of the middle cylinder body can be adjusted according to the number of batteries in the battery modules so as to adapt to different capacity requirements.

Example 1

As shown in fig. 1 to 3, the present embodiment provides an insulating housing of a battery module, which is a spliced battery module insulating housing, and specifically includes a first cover plate 2, a second cover plate 3, and an intermediate cylinder 1; the middle cylinder body 1 is an extrusion molding part, the length of the middle cylinder body is controllable, the length of the middle cylinder body can be controlled in the following two modes, firstly, the length of the middle cylinder body is controlled according to the number and the size requirements of batteries in a battery module during extrusion molding, secondly, the length of an insulating shell is reserved longer during extrusion molding manufacturing, and the middle cylinder body is cut on a using site, so that the battery modules with different lengths are met. Because the insulating shell is an extrusion molding part, the length of the insulating shell can be adjusted according to the number of batteries in the battery module, so that the battery module structure can be flexibly combined, and the insulating shell is suitable for different capacity requirements.

In this embodiment, the first cover plate 2 and the second cover plate 3 are disposed at the open ends of two sides of the middle cylinder 1 and detachably connected with the middle cylinder 1 to form a battery module accommodating chamber. The first cover plate 2, the second cover plate 3 and the middle cylinder body 1 can be connected in various modes such as a splicing part 4 or a locking piece, and in order to ensure the connection to be simple and reliable, the splicing part 4 is preferably adopted for connection.

The middle cylinder 1 may be an integral structure or a split structure, preferably a split structure, as shown in fig. 2, and the middle cylinder 1 is mainly formed by enclosing a U-shaped housing 11 and a top plate 12 through a splicing portion 4. The middle cylinder body 1 is made into a split structure and is connected through the splicing part 4, so that the battery module is convenient to install and maintain.

In addition, with respect to the injection molded part, the six faces of the insulating housing are each composed of an extrusion, so that there is no draft on each face. The insulating shell without the draft angle can effectively utilize the installation space inside the insulating shell, and the waste of the effective installation space is avoided. Meanwhile, as the sides of the insulating shell are not provided with draft angles, the whole insulating shell has more accurate installation size, and the installation size of the battery module cannot be influenced.

As shown in fig. 3, in order to make the disassembly and assembly of the U-shaped housing 11 and the top plate 12 more convenient and quick, the splice portion 4 includes a mating splice protrusion 41 and a mating splice groove 42, and the positions of the splice protrusion 41 and the splice groove 42 may be located on the contact surface of the two splice members, which is not limited in this embodiment. For example, the U-shaped housing 11 may be provided with the splice projection 41, the top plate 12 may be provided with the splice groove 42, and the U-shaped housing 11 may be provided with the splice groove 42, and the top plate 12 may be provided with the splice projection 41. The clamping fit of the splicing protrusion 41 and the splicing groove 42 is simple in structure, convenient to manufacture and convenient to install and detach on site.

As shown in fig. 2, in the present embodiment, through grooves or through holes 15 are formed in both longitudinal side walls of the middle cylinder 1, and the through grooves or through holes 15 facilitate the connection of the bus plates of the battery module to external devices through. The upper surface of the bottom of the middle cylinder body 1 is also provided with two first supporting parts 13 protruding upwards, the two first supporting parts 13 form a channel 16, and the channel 16 can be used for placing various auxiliary components such as explosion venting pipelines, sharing pipelines, cooling pipelines and the like, so that the battery module is improved in the aspects of safety, performance and the like; meanwhile, the bottom lower surface of the intermediate cylinder 1 is provided with at least one downwardly protruding second supporting portion 14 for supporting and fixing, and the second supporting portion 14 stably supports the entire insulating housing.

In this embodiment, the first cover plate 2, the second cover plate 3, and the middle cylinder 1 may be made of various insulating materials such as plastics, specifically may be made of materials such as PVC, nylon, and PP, and preferably made of PVC, and the PVC casing not only can satisfy the rigidity requirement, but also can reduce the manufacturing cost.

The insulating housing in this embodiment not only can protect and insulate the battery module, avoids the hidden trouble that battery module and external equipment produced the short circuit, can also avoid external damage such as impact, vibration, falling in the external environment. In addition, this insulating housing can also effectively separate the heat transfer between two adjacent battery modules, especially when certain battery module takes place thermal runaway, and insulating housing can effectively separate heat transfer, prevents thermal diffusion, avoids the thermal runaway of battery module of bigger scope, improves battery module's security.

Example 2

The insulating shell can be composed of four parts or six parts, and is preferably composed of six parts for convenient installation and low processing cost. When composed of six parts, as shown in fig. 4 to 5, on the basis of embodiment 1, the U-shaped housing 11 of the present embodiment includes a bottom plate 111 and two side plates 112, the bottom plate 111 and the two side plates 112 being formed by being enclosed by the splice 4. The U-shaped shell 11 is of a split structure, the process is relatively simple, the extrusion difficulty is reduced, and the manufacturing cost is reduced.

As shown in fig. 6, in order to make the connection between the top plate 12, the bottom plate 111 and the two side plates 112 of the middle cylinder 1 more reliable, the end of the splicing protrusion 41 is provided with a clamping table 411 with a circular arc cross section, and the bottom of the splicing groove is provided with a notch with a circular arc cross section adapted to the clamping table 411. After the circular arc clamping table is matched with the circular arc notch in a clamping way, the connection of the spliced parts is more reliable, and each part is not easy to be separated during external vibration, impact and internal explosion.

In this embodiment, the first cover plate 2, the second cover plate 3 and the middle cylinder 1 are all of a double-layer structure. The rigidity of the insulating shell with the double-layer structure is further improved, larger external impact and internal pressure can be borne, the insulating effect is further improved, and the safety of the battery module is better.

Example 3

The battery is formed into a battery module by considering various factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters. Meanwhile, the production efficiency and the safety of the battery module are also considered. In the assembly process of the battery module, the assembly efficiency of the battery module is improved, the stability of a plurality of batteries is guaranteed, and therefore the problems that the batteries are shifted to cause electric connection failure and the like are avoided when the batteries vibrate even if the batteries vibrate in the use process of the battery module.

Based on this, as shown in fig. 7 and 8, the present embodiment provides a battery module including a plurality of batteries 5 and any one of the spliced battery module insulating cases described above, wherein the insulating case adopts the insulating case of embodiment 1 or embodiment 2, and the insulating case is an insulating case with adjustable length without draft. The plurality of batteries 5 are sequentially arranged in the spliced battery module insulating housing. The positive poles of a plurality of batteries 5 in the battery module are electrically connected through a bus plate 6, the negative poles are electrically connected through another bus plate 6, the bus plate 6 can be in an L-shaped structure, and part of the bus plate is positioned in the insulating shell, and the other part of the bus plate passes through the through groove or the through hole to be electrically connected with the adjacent battery module or the external equipment. In addition, heat pipes 7 can be further arranged on the positive pole and the negative pole of the battery module, and the heat pipes 7 transfer heat of the battery to the outer side of the insulating shell. The two first supporting parts 13 of the insulating housing form a channel in which various auxiliary components such as the explosion venting pipe 8, the shared pipe, the cooling pipe and the like can be placed. In the present embodiment, it is preferable to place the explosion venting pipe 8, and when thermal runaway occurs in any battery, the thermal runaway smoke is discharged to a designated location or subjected to a corresponding process by entering the explosion venting pipe 8.

In order to further secure the stability of the installation of the battery module, the insulating housing and the battery 5 may be connected by a locking part 10, and the locking part 10 may be a locking member such as a screw. The locking part 10 is connected the casing of insulating housing and battery 5, and during the specific connection, can set up a plurality of connecting plates 9 in the outside of a plurality of battery casings, connecting plate 9 is connected with the casing lateral wall of a plurality of batteries, and connecting plate 9 is with battery 5 fixed connection group, later on, is connected connecting plate 9 and insulating housing through locking part 10, and this kind of mode can restrict the removal of battery 5 in insulating housing, avoids the electric connection inefficacy scheduling problem that misplacement leads to between the battery 5, guarantees the stability when battery 5 uses.

In addition, because be provided with the strengthening rib 51 on the lower apron of battery housing in the battery module, at this moment, first supporting part can set up to four, wherein, form the passageway that is used for installing the explosion venting passageway between 2 nd first supporting part and the 3 rd first supporting part, form an installation passageway between 1 st first supporting part and the 2 nd first supporting part, form an installation passageway between 3 rd first supporting part and the 4 th first supporting part, at this moment, the strengthening rib on the battery housing imbeds in above-mentioned two installation passageways, has carried out more stable support to a plurality of batteries.

Claims (11)

1. The spliced battery module insulating shell is characterized by comprising a first cover plate, a second cover plate and a middle barrel;

the middle cylinder body is an extrusion molding piece;

the first cover plate and the second cover plate are arranged at the open ends of the two sides of the middle cylinder and are detachably connected with the middle cylinder to form a battery module accommodating bin.

2. The insulating housing of a spliced battery module according to claim 1, wherein the intermediate cylinder is mainly formed by enclosing a U-shaped housing and a top plate through a splice.

3. The insulating housing of a spliced battery module according to claim 2, wherein the U-shaped housing is mainly formed by a bottom plate and two side plates enclosed by a splice.

4. The spliced battery module insulating case according to claim 3, wherein the splice comprises a mating splice protrusion and splice groove.

5. The spliced battery module insulating shell according to claim 4, wherein the tail end of the splicing protrusion is provided with a clamping table with a circular arc-shaped cross section, and the bottom of the splicing groove is provided with a notch with a circular arc-shaped cross section, which is matched with the clamping table.

6. The insulating case for a spliced battery module according to any one of claims 1 to 5, wherein the upper bottom surface of the intermediate cylinder is provided with at least two first support portions protruding upward, the two first support portions constituting a passage; meanwhile, at least one second supporting part which is downwards protruded and used for supporting and fixing is arranged on the lower surface of the bottom of the middle cylinder body.

7. The insulating housing of claim 6, wherein the two longitudinal side walls of the middle cylinder are provided with through grooves or through holes.

8. The insulating housing of claim 7, wherein the first cover plate, the second cover plate, and the middle cylinder are all of a double-layer structure.

9. The insulating housing of claim 8, wherein the first cover plate, the second cover plate and the middle cylinder are all made of PVC.

10. A battery module, comprising a plurality of batteries and the spliced battery module insulating housing of any one of claims 1 to 9, wherein the plurality of batteries are sequentially arranged and are arranged in the spliced battery module insulating housing.

11. The battery module according to claim 10, wherein the insulating case is connected to the battery by a locking part.