CN213546424U

CN213546424U - Protective cover, assembly thereof and battery module

Info

Publication number: CN213546424U
Application number: CN202022330996.6U
Authority: CN
Inventors: 徐卫东; 李振龙
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-06-25
Anticipated expiration: 2030-10-19

Abstract

A protective cover, a component thereof and a battery module belong to the field of batteries. The protective cover comprises a body, a first side plate and a second side plate, wherein the first side plate and the second side plate are connected to the body. The body is provided with a limiting hole, the first side plate is provided with a first clamping groove, and the second side plate is provided with a second clamping groove. The protective cover can realize the reinforcement and protection effects on the output electrode and the electric leading-out structure in the battery module through the limiting hole, the first clamping groove and the second clamping groove, so that the safety of the battery module in the installation, carrying and moving processes is improved.

Description

Protective cover, assembly thereof and battery module

Technical Field

The application relates to the field of batteries, in particular to a protective cover and a component and a battery module thereof.

Background

The battery module is connected with an external electric leading-out structure through the output electrode, so that the output electrode is exposed outside the battery module. In the transportation and assembly processes, the battery module is easy to loose.

Therefore, it is necessary to fix components such as the output electrode of the battery module.

SUMMERY OF THE UTILITY MODEL

In order to improve, even solve the not hard up problem of parts such as the output pole of battery module, this application has proposed a visor and subassembly, battery module thereof.

The application is realized as follows:

in a first aspect, examples of the present application provide a protective cover applied in a battery module to protect an output electrode and an electrical lead-out structure connected by a fixing structure in the battery module.

The protective cover comprises a body, a first side plate and a second side plate, wherein the first side plate and the second side plate are connected to the body.

Wherein the body has a spacing hole for receiving a portion of the fixation structure.

Wherein, the first curb plate has first draw-in groove. The first side plate is matched and connected with the base in the battery module through the first clamping groove so as to limit the electric leading-out structure to move along a first direction relative to the battery module;

wherein, the second curb plate has the second draw-in groove with spacing hole intercommunication. And the second side plate is configured to be matched and connected with the electric leading-out structure in the battery module through the second clamping groove so as to limit the body to move along the second direction relative to the battery module.

The protective cover can play a role in reinforcing, so that the output electrode and the electric leading-out structure can be mutually and stably contacted and matched with each other more firmly, and the situation that the output electrode and the electric leading-out structure are easy to loosen is avoided. In the example, the body of the battery module is limited by the limiting hole to the fixing structure matched with the limiting hole, so that the fixing structure is prevented from being separated from the battery module. The first side plate is connected with the base through the first clamping groove, and the second side plate is connected with the electric leading-out structure through the second clamping groove. Therefore, the protective cover can play a role in limiting and fixing from the three positions, so that the output electrode and the electric leading-out structure are stably matched and are prevented from being easily loosened.

According to some examples of the present application, the first side plate has a plurality of and is fixedly connected to different surfaces of the body.

The first side plate is provided with a plurality of first clamping grooves, so that the protective cover can be provided with a plurality of first clamping grooves, the protective cover can be conveniently installed through different postures, and the use flexibility is improved.

According to some examples of the present application, the first side plate has a T-shaped cross-sectional structure.

The first side plate with the T-shaped structure has the advantages of simple structure and easiness in manufacturing.

According to some examples of the present application, a side wall of the second card slot has a groove into which a side edge of the power lead-out structure is inserted; alternatively, the side wall of the second card slot has a catch configured to restrain the electrical lead-out structure when the electrical lead-out structure is inserted into the second card slot.

The second clamping groove of the second side plate is constructed in the two modes, so that corresponding manufacture can be flexibly performed according to selection, and convenience in manufacture is provided.

According to some examples of the application, there is a rib between the second side plate and the body.

The floor plays the reinforcing effect, can improve the joint strength of second curb plate and body.

In a second aspect, examples of the present application provide a reinforcement assembly. The protective cover comprises the protective cover, the protective plate, the end plate and the base.

Wherein, the protection sheet is used for cooperating with the battery of the tip of battery module. The end plate is attached to the protective sheet. The base is arranged on the end plate, the base piece is provided with a bulge, and the bulge is embedded into the first clamping groove of the first side plate in the protective cover. The output electrode and the electric leading-out structure of the battery module are connected to the base through the fixing structure, and the electric leading-out structure is further embedded into a second clamping groove of the second side plate in the protective cover. Part of the fixing structure is embedded into the limiting hole of the body in the protective cover.

According to some examples of the application, the protrusion has an L-shaped cross-sectional structure.

According to some examples of the application, the base has a shield plate attached to the protective sheet to form a separation between the output electrode and the protective sheet.

The guard plate of the base can be pressed by the output electrode of the battery module to be attached to the protective sheet, thereby contributing to improvement of the mounting stability of the base on the end plate.

According to some examples of the present application, the base has a mounting post having a mounting hole for mating with a fixed structure.

In a third aspect, examples of the present application provide a battery module including:

a battery pack;

the reinforcing component is as described above, and the protective sheet in the reinforcing component is attached to the end cells in the battery pack;

an output electrode, one end of which is electrically connected with the electrode of the single cell at the end part in the battery pack, and the other end of which is combined with the base in the reinforcing assembly;

the electric leading-out structure is fixed on the base together with the output electrode through the fixing structure;

the protective cover in the reinforcing component is buckled with the fixed structure and is respectively connected with the bulge of the base through the first side plate in a matched mode and connected with the electric leading-out structure through the second side plate in a matched mode.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a battery module in an example of the present application at a first viewing angle;

fig. 2 is a schematic structural diagram of a battery module in an example of the present application at a second viewing angle;

FIG. 3 is a schematic structural view of a first reinforcement member in an example of the present application;

FIG. 4 is a schematic diagram of the mating relationship between the reinforcing component and the output electrode and electrical lead-out structure of FIG. 3;

FIG. 5 is a schematic structural view of a second reinforcement member in an example of the present application;

FIG. 6 is a schematic view of a first base according to an example of the present application;

FIG. 7 is a schematic diagram of a second base in an example of the present application;

fig. 8 is a schematic structural diagram of a protective cover in an example of the present application from a first viewing angle;

FIG. 9 is a schematic structural diagram of a protective cover in an example of the present application from a second perspective;

FIG. 10 is a schematic view of the protective cover of FIG. 8 mated with the first base of FIG. 6;

fig. 11 is a schematic diagram illustrating a mating structure of the protective cover and the electrical lead-out structure shown in fig. 8.

Icon: 1-a battery module; 10-a battery pack; 101-series slice; 11-a reinforcement component; 111-a protective sheet; 112-end plate; 1121-mounting holes; 113-a base; 113 a-a base; 1131-guard plate; 1132 — a bump; 114-a protective cover; 1141-body; 11411-a limiting hole; 1142-a first side panel; 11421-a first card slot; 1143-a second side plate; 11431-a second card slot; 11432-snap fastener; 1144-ribbed plate; 12-an output pole; 13-an electrical lead-out structure; 14-side edge plate; 15-screw.

Detailed Description

In a battery module, the output electrode is generally electrically connected to the electrode of the battery, and then connected to the electrical lead-out structure. In order to protect the battery, the battery of the battery module is provided with an end plate and a protective sheet at the end part, and the output electrode and the electric leading-out piece are reinforced by the protective sheet and the end plate. However, the output pole and the electrical lead-out structure are easily fixed to the end plate to be loosened.

In this regard, the inventors tried to clamp or insert a base on the end plate of the battery module, then fix the output electrode and the electric lead-out structure on the base by screws, and then set a top cover plate above the base to cover the output electrode. In actual use, the output pole fixing device can play a role in improvement to a certain extent (compared with the situation that no reinforcing operation is carried out), but is still easy to loosen during transportation and vibration.

In view of the above, the inventor improves the structure, and thus a new fixing structure is proposed in the present application to reinforce the output electrode and the electrical lead-out structure, so as to prevent the two from easily loosening.

In an example, a new battery module 1 is proposed based on such a reinforcing structure, and the structure thereof is shown in fig. 1 and 2. Fig. 1 discloses a structural schematic diagram of the battery module 1 at a first viewing angle, and fig. 2 discloses a structural schematic diagram of the battery module 1 at a second viewing angle.

The battery module 1 includes a battery pack 10, an output electrode 12, an electrical lead-out structure 13, and a reinforcing member 11. Furthermore, the battery module 1 may be provided with various structures such as a side plate 14, an upper cover plate, a lower cover plate, and a housing according to different structural manners to protect, limit, and fix the internal battery pack.

The main components of the battery module 1 will be described below.

In the illustrated structure of the present application, the battery pack 10 is formed by connecting two rows of cells in series. The two rows of cells are arranged side by side along direction a. And each column of cells includes a plurality of (9 shown) cells arranged in series in the direction C, wherein the series connection can be achieved by a conductive series tab 101. Therefore, the battery assembly 10 has a total of 18 cells connected in series. Obviously, the number of cells and the layout of the cells in the battery pack 10 are not limited to the illustrated form, and the illustration is only for exemplary purposes.

The series connection of the cells in the battery pack 10 is as follows:

the two rows of cells are electrically connected at one end in the direction C by an electrical lead-out structure 13 (shown in fig. 2), while the two rows of cells are also connected at the other end in the direction C (shown in fig. 1) by an electrical lead-out structure 13, respectively. In the figure, the electrical lead-out structure 13 has three, and the output electrode 12 has four.

The electric power of the battery pack 10 is output to the outside through the output electrode 12 and the electric lead-out structure 13 electrically connected to the electrodes of the unit cells at the end portions thereof. The output electrode 12 may be generally implemented in a sheet structure made of a conductive material, and may be configured as a sheet (may be bent as appropriate) depending on the specific structure of the battery module 1, in consideration of installation. One end of the output electrode 12 is electrically connected to an electrode of a single cell located at an end portion in the battery pack 10 (pressed by the series connection piece 101); and the other end of the output pole 12 is secured to a base 113 in the reinforcing assembly 11, illustratively secured to the base along with electrical lead-out structures by securing structures such as bolts/screws.

The electrical lead-out structures 13 may optionally be constructed using copper bars in general. And further, because the copper bar has a relatively large length and is mainly kept outside the battery module, therefore, a wrapping layer such as an insulating layer can be arranged on the surface of the copper bar to prevent accidents or damages caused by contact with other components. As mentioned above, one end of the electrical lead-out structure 13 is connected to the output electrode 12 through the fixed structure to the base 113, and the other end thereof is usually a free end for connecting to the electrical equipment, as shown in fig. 1; or the other end may be connected to the base 113 through a fixing structure with the other output electrode 12 so as to connect different battery strings in series, as shown in fig. 2.

The connection of the output pole 12 to the electrical lead-out structure 13 is reinforced by a protective cover 114 in the reinforcing component 11. In the example, the protective cover 114 is snapped into place at the junction of the two and is retained by the protective cover 114 being snapped into engagement with the base 113 and the electrical lead-out structure 13 in the reinforcement assembly 11.

The reinforcing member 11 is a member for protecting the battery while reinforcing the electric lead-out structure 13 and the output electrode 12. In the present example, the reinforcing members 11 have four and are respectively provided at both ends of the battery pack 10. Generally, the number of the reinforcing members 11 may be corresponding to the number of the output poles 12. However, the number thereof is selected according to the specific situation and is not limited to the scheme given as an example of the present application.

In an example, referring to fig. 3, the reinforcing member 11 includes a protective sheet 111, an end plate 112, a base 113, and a protective cover 114. In which fig. 3 discloses a case with one base 113 and a case in which two bases 113 are provided in the reinforcement member 11 is disclosed in the structure shown in fig. 5.

The reinforcement element 11 cooperates with the output electrode 12 and the electrical lead-out structure 13 in a manner as shown in fig. 4.

The protective sheet 111 is used to engage with the cells at the end of the battery module 1. The protective sheet 111 is attached to the unit cells at the end of each row of cells in the battery pack 10. The protective sheet 111 has a substantially sheet-like structure, and is attached to the surface of the cell to form a separation between the end plate 112 and the cell, and can prevent the output electrode 12 from directly contacting the case of the cell. In other words, the end plate 112 is attached to the protective sheet 111 so that the protective sheet 111 is positioned between the end plate 112 and the unit cell.

The end plate 112 has a thickness greater than that of the protective sheet 111, and has a plurality of holes; these holes can reduce the amount of consumables used, the self weight of the end plate 112, and also serve as the mounting holes 1121 of the base 113.

The base 113 has a generally block-like structure. Which is fixed to the end plate 112 by being inserted into the mounting hole 1121. Further, since the end plate 112 has the plurality of mounting holes 1121, the number and positions of the bases 113 fixed to the end plate 112 can be selectively arranged according to the actual use requirement. For example, an example of one pedestal 113 is shown in FIG. 3; fig. 5 shows an example having two bases 113, and the two bases 113 are fitted to the mounting holes 1121 of both sides of the end plate 112, respectively.

Fig. 4 discloses the way in which the output electrode 12 and the electrical lead-out structure 13 are connected by a fixing structure (in the example, a screw 15), and the way in which they are fitted with the protective cover 114, the end plate 112, the base 113, and the protective sheet 111.

The structure of the base 113 is shown in fig. 6, and the structure of the base 113a is shown in fig. 7, and the difference between them is mainly whether or not the shield 1131 is provided.

The base 113, as a whole, has a main body structure having a hole therein and in which a mounting post (built-in thread) for connection with a bolt or screw 15 can be secured (e.g., interference fit). The main body of the base 113 further has a protrusion 1132, which can cooperate with the protection cover 114 to limit the protection cover 114.

As shown in fig. 6, the protrusion 1132 has two symmetrical inverted-L structures. As a component to be fastened to the protective cover 114, for example, the protrusion 1132 may be inserted into a first card slot 11421 (shown in fig. 10) of a first side plate 1142 of the protective cover 114, so that the movement of the protective cover 114 in the direction C shown in fig. 1 is limited. The protection plate 1131 disposed on the main body thereof can be used to form a separation between the output electrode 12 and the protection plate 111, as shown in fig. 3 and 5. In various base 113 configurations, shield 1131 may optionally be provided as appropriate.

The protective cover 114 includes a body 1141, a first side plate 1142, a second side plate 1143, and ribs 1144, see fig. 8 and 9. In the structure shown in fig. 8 and 9, the body 1141 has a substantially quadrangular structure, and thus, in the example, the first side plate 1142 is provided in three and the second side plate 1143 is provided in one. Three first side plates 1142 and a second side plate 1143 are respectively combined around the body 1141. The ribs 1144 serve as reinforcing structures and are connected to the body 1141 and the second side plate 1143, respectively.

In the present example, the protective cover 114 is an integrally formed structure, and is made of an insulating material by injection molding, extrusion molding, or the like. Of course, the protective cover 114 can also be manufactured in a non-integral manner; namely, all the components are manufactured in a distributed mode and then are combined into a whole through proper modes such as bonding, clamping, bolt connection and the like.

The protective cover 114 has a shell-like structure as a whole and can thus be snapped into the structure consisting of the output pole 12, the electrical lead-out structure 13 and the fixing structure (e.g. the screw 15). In the present example, the protective cover 114 is snapped onto the fixed structure and snap 11432 into engagement with the electrical lead-out structure 13 and the aforementioned base 113, respectively.

The body 1141 has a position-limiting hole 11411, which may be a part (e.g., a head or a crown) for receiving a fixing structure implemented by way of example as the screw 15, thereby limiting the movement of the screw 15 in the axial direction of the position-limiting hole 11411.

The first side plate 1142 may be configured in a T-shaped or rectangular plate, and is further provided with a first slot 11421. The first card slot 11421 can receive the protrusion 1132 of the base 113, as shown in fig. 10. Since the base 113 is coupled to the battery module 1 through the end plate 112, the protrusion 1132 is also stationary with respect to the battery pack 10 therein. Then, the base 113 provided with the protrusion 1132 can limit the position of the protective cover 114, so as to limit the movement of the protective cover 114 relative to the battery module 1 along the first direction (the direction C shown in fig. 1).

The second side plate 1143 may be configured in a U-shaped plate manner, so as to form a U-shaped second slot 11431 communicating with the limiting hole 11411 disposed on the body 1141, see fig. 11. The second channel can be inserted by the electrical lead-out structure 13 in the battery module 1, so as to be connected with the electrical lead-out structure 13 in a matching manner, so as to limit the movement of the body 1141 in the second direction (the direction B shown in fig. 1) relative to the battery module 1.

The second side plate 1143 limits the electrical lead-out structure 13, for example, a side wall of the second slot 11431 has a side groove (not shown) into which a side edge of the electrical lead-out structure 13 is inserted, so as to form a push-pull structure using the side groove as a rail.

Alternatively, the second side plate 1143 may constrain the electrical lead-out structure 13, for example, by a sidewall of the second card slot 11431 having a snap 11432 (in the present example, as shown in fig. 11), the snap 11432 being configured to constrain the electrical lead-out structure 13 when the electrical lead-out structure 13 is inserted into the second card slot 11431.

The protective cover 114 in the present example can be used to define the fixing structure such as the screw 15, so that it will not loosen easily, and therefore the screw 15 can be used to fixedly connect the output electrode 12 and the electrical leading-out structure 13, so as to prevent the internal resistance of the connection from increasing due to the loosening of the screw 15, and avoid the problems of heat generation and fire generation caused by the increase of the internal resistance. And the protective cover 114 is also matched and connected with the base 113 and the electric leading-out structure 13, so that the output electrode 12 and the electric leading-out structure 13 are further limited and reinforced.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a visor, is applied to battery module to consolidate output pole and the electricity extraction structure of connecting through fixed knot structure, its characterized in that, the visor includes:

a body having a retaining hole for receiving a portion of the fixation structure;

the first side plate is fixedly connected to the body and provided with a first clamping groove, and the first side plate is matched and connected with the base in the battery module through the first clamping groove so as to limit the electric leading-out structure to move along a first direction relative to the battery module;

and the second side plate is fixedly connected to the body and provided with a second clamping groove communicated with the limiting hole, and the second side plate is matched and connected with an electric leading-out structure in the battery module through the second clamping groove so as to limit the body to move along a second direction relative to the battery module.

2. The protective cover of claim 1, wherein the first side plate has a plurality of side plates fixedly connected to different surfaces of the body.

3. The protective cover of claim 1 or 2, wherein the first side plate has a T-shaped cross-sectional configuration.

4. The protective cover of claim 1, wherein a side wall of the second card slot has a recess into which a side edge of the electrical lead-out structure is inserted;

alternatively, a sidewall of the second card slot has a catch configured to restrain the electrical lead out structure when the electrical lead out structure is inserted into the second card slot.

5. The protective cover of claim 1 or 4, wherein ribs are provided between the second side plate and the body.

6. A reinforcement assembly, comprising:

the protective cover of any one of claims 1 to 5;

the protection sheet is used for being matched with the batteries at the end parts of the battery modules;

an end plate attached to the protective sheet;

the base is arranged on the end plate and provided with a bulge, and the bulge is embedded into a first clamping groove of the first side plate in the protective cover;

the output electrode and the electric leading-out structure of the battery module are connected to the base through a fixing structure, the electric leading-out structure is further embedded into a second clamping groove of a second side plate in the protective cover, and part of the fixing structure is embedded into a limiting hole of the body in the protective cover.

7. The reinforcement assembly of claim 6, wherein the projections have an L-shaped cross-sectional configuration.

8. The reinforcement assembly of claim 6, wherein the base has a shield that is attached to the protective sheet to form a barrier between the output pole and the protective sheet.

9. The reinforcement assembly of claim 6, wherein the base has mounting posts with mounting holes for mating with the securing structure.

10. A battery module, comprising:

a battery pack;

the reinforcing component according to any one of claims 6 to 9, wherein a protective sheet in the reinforcing component is fitted to an end cell in the battery pack;

an output electrode having one end electrically connected to an electrode of a battery at an end portion of the battery pack and the other end coupled to the base in the reinforcing member;

an electrical lead-out structure fixed to the base together with the output electrode by a fixing structure;

the protective cover in the reinforcing component is buckled with the fixing structure and is respectively connected with the bulge of the base through the first side plate in a matched mode and connected with the electric leading-out structure through the second side plate in a matched mode.