CN113036305A

CN113036305A - Battery pack

Info

Publication number: CN113036305A
Application number: CN202110167829.0A
Authority: CN
Inventors: 张万财; 郭敏; 王欢
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Haichen New Energy Technology Co Ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-06-25
Anticipated expiration: 2041-02-07
Also published as: CN113036305B

Abstract

The application relates to the technical field of energy storage devices, in particular to a battery pack, which comprises a battery box body and a battery module, wherein the battery box body comprises a bottom plate and a limiting beam connected to the bottom plate; each battery module is respectively arranged in the battery box body; a first positioning component is arranged on the first side of the battery module along the width direction of the battery module; the limiting beam is provided with a positioning groove matched with the first positioning part; the first positioning part can be inserted into the positioning groove and matched with the positioning groove when the battery module inclines, so that the battery module is positioned in the battery box body. The battery pack that this application embodiment provided sets up first locating component in one side of battery module, sets up the constant head tank on the spacing roof beam of battery box, fixes a position one side and the battery box of battery module through the cooperation of first locating component and constant head tank. Can fix the opposite side and the battery box of battery module, compare with prior art, simplify processing technology, improve the installation effectiveness of battery module.

Description

Battery pack

Technical Field

This application energy memory technical field especially relates to a battery package.

Background

With the deepening of the environmental protection concept of people, new energy automobiles replacing traditional fuel automobiles are becoming a new trend.

The battery pack generally includes a battery case and a battery module, and the battery module is accommodated in the battery case. In order to increase the energy density of the battery pack, the battery module is elongated in the prior art. After the battery module is lengthened, the problems of instability, vibration and the like of the battery module in the use process can be caused.

Disclosure of Invention

In view of this, the present application provides a battery pack to solve the technical problem in the prior art that a battery module is easy to vibrate and unstable.

The application provides a battery package, wherein, include:

the battery box body comprises a bottom plate and a limiting beam connected to the bottom plate; the battery modules are respectively arranged in the battery box body; a first positioning component is arranged on a first side of the battery module along the width direction of the battery module;

the limiting beam is provided with a positioning groove matched with the first positioning part;

the first positioning part can be inserted into the positioning groove and matched with the positioning groove when the battery module inclines, so that the battery module is positioned in the battery box body.

In one possible embodiment, the positioning groove has an inclined guide surface therein, the guide surface being inclined downward in a height direction of the battery module.

In a possible embodiment, a clamping protrusion is arranged in the positioning groove;

when the battery module is positioned on the battery box body, the first positioning part can be limited by the clamping protrusion.

In one possible embodiment, the first positioning member is a positioning plate.

In one possible embodiment, the positioning plate extends in a length direction of the battery module.

In one possible embodiment, the limit beam is provided with a positioning hole, and the positioning hole and the positioning groove are positioned on the same side of the limit beam;

the battery module is provided with a second positioning component, and the second positioning component is positioned on the first side of the battery module;

the second positioning component can be inserted into the positioning hole and matched with the positioning hole when the battery module inclines, so that the battery module is positioned in the battery box body.

In one possible embodiment, the second positioning member is a positioning pin.

In one possible embodiment, the first positioning member is located higher than the second positioning member in a height direction of the battery module.

In one possible embodiment, a second side of the battery module is provided with a hanging lug along the width direction of the battery module;

the battery box body is provided with a fixed seat;

the fastener passes the hangers with the fixing base to with battery module with battery box fixed connection.

In one possible embodiment, the position of the hanging lug coincides with the height of the second positioning member in the height direction of the battery module.

In one possible embodiment, the first side of one of the battery modules is disposed opposite the first side of the other battery module among the adjacent battery modules.

In one possible embodiment, the battery module further comprises an elastic pad arranged between the battery module and the bottom plate;

the elastic pad can be elastically deformed under the extrusion of the battery module.

In a possible embodiment, a liquid cooling plate is arranged between the elastic pad and the bottom plate.

In one possible embodiment, the battery case is a liquid-cooled integrated case.

The application provides a battery package sets up first locating component in one side of battery module, sets up the constant head tank on the spacing roof beam of battery box, fixes a position one side and the battery box of battery module through the cooperation of first locating component and constant head tank. Can fix the opposite side and the battery box of battery module, compare with prior art, simplify processing technology, improve the installation effectiveness of battery module.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application in an installation state;

fig. 2 is a structural plan view of a battery pack provided in an embodiment of the present application in an installed state;

fig. 3 is a schematic structural diagram of a battery case in the battery pack provided in the embodiment of the present application;

FIG. 4 is a cross-sectional view taken along line C-C of FIG. 3;

fig. 5 is a schematic perspective view illustrating a structure of a battery module in a battery pack according to an embodiment of the present disclosure;

fig. 6 is a top view of a battery module in a battery pack according to an embodiment of the present disclosure;

fig. 7 is a front view of a structure of a battery module in a battery pack according to an embodiment of the present disclosure;

FIG. 8 is an enlarged view at D of FIG. 4;

FIG. 9 is a sectional view taken along line A-A in FIG. 2;

FIG. 10 is a sectional view taken along line B-B of FIG. 2;

FIG. 11 is an enlarged view at F of FIG. 10;

FIG. 12 is an enlarged view at E in FIG. 9;

fig. 13 is an enlarged view at G in fig. 10.

Reference numerals:

1-a battery case;

11-a base plate;

12-a limit beam;

121-positioning grooves;

121 a-guide surface;

121 b-a limiting surface;

122-positioning holes;

13-a fixed seat;

2-a battery module;

21-a first positioning member;

22-a second positioning member;

23-hanging a lug;

3-a fastener;

4-elastic cushion.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

The embodiment of the application provides a battery pack, and the battery pack comprises a battery box body 1 and a battery module 2. The battery module 2 may be formed by stacking, arranging, and fixing a plurality of secondary batteries. In the prior art, in order to increase the energy density of the battery pack, the overall length of the battery module 2 is increased, which may cause instability during use. If adopt mounting and mounting hole complex mode to fix battery module 2, set up the arm-tie in battery module 2's both sides, need process installation hangers and bolt installation through-hole, simultaneously, also need not to process the screw hole that corresponds quantity on the battery box 1, perhaps installation steel wire facing behind the processing through-hole, the course of working is loaded down with trivial details. The two pull plates need to be processed with screws after profile extrusion, the processing workload is large, the module cost is high, the distance reserved for processing tools is limited due to the arrangement positions of the mounting holes, long milling cutters are needed for hole milling, and the processing difficulties such as cutter breakage and cutter clamping are easy to occur.

Moreover, the number of bolts as the fixing members is too large, and the flatness of the mounting surface and the requirements on the battery case 1 are high, which also increases the processing difficulty. The battery pack provided by the embodiment of the application can solve the problems.

As shown in fig. 1 and 2, the present application provides a battery pack including a battery case 1 and a battery module 2, the battery module 2 being mounted in the battery case 1.

As shown in fig. 1 to 4, the battery case 1 includes a bottom plate 11 and a limit beam 12 connected to the bottom plate 11, the battery case 1 can accommodate two or more battery modules 2, and each battery module 2 is installed in the battery case 1. The limiting beam 12 can be integrally formed on the bottom plate 11, so that the strength of the battery box body 1 is ensured.

As shown in fig. 5 to 7, the first side of the battery module 2 is provided with a first positioning member 21 in the width direction (X) of the battery module 2. The first positioning member 21 may be a positioning plate having a thin plate shape for positioning the battery module 2 when the battery module 2 is mounted in the battery case 1.

As shown in fig. 8, the check beam 12 may be of a non-solid structure, and the check beam is provided with positioning grooves 121 for cooperation with the first positioning member 21, whereby the positioning grooves 121 may be formed directly in the check beam 12.

As shown in fig. 9 to 11, the first positioning member 21 can be inserted into the positioning groove 121 and engaged with the positioning groove 121 when the battery module 2 is tilted, to position the battery module 2 in the battery case 1.

When the battery module 2 is mounted and positioned in the battery case 1, referring to fig. 12, the first positioning member 21 is received and fixed in the positioning groove 121.

The battery pack that this application embodiment provided sets up first locating component 21 in one side of battery module 2, sets up constant head tank 121 on the spacing roof beam 12 of battery box 1, fixes a position one side and the battery box 1 of battery module 2 through the cooperation of first locating component 21 and constant head tank 121. Can fix battery module 2's opposite side and battery box 1, compare with prior art, simplify processing technology, improve battery module's installation effectiveness.

Referring to fig. 8, in a specific embodiment, the positioning groove 121 has an inclined guide surface 121a therein, and the guide surface 121a is inclined downward in the height direction of the battery module 2.

Referring to fig. 8 and 11, after the first positioning member 21 is inserted into the positioning groove 121, it can rotate around the pivot H until the battery module 2 is rotated to the state shown in fig. 12, and then the battery module is mounted in place.

In a specific embodiment, a limiting surface 121b is disposed in the positioning groove 121, as shown in fig. 8 and 12, when the battery module 2 is positioned in the battery case 1, the limiting surface 121b can limit the first positioning member 21. When the battery pack is mounted on a product such as an electric vehicle, the first positioning member 21 may be unstable in the positioning groove 121 due to the movement of the vehicle, and the first positioning member 21 may be effectively prevented from shaking by the positioning limiting surface 121 b.

As mentioned above, the first positioning member 21 may be a positioning plate. This locating plate can set up to the lamella form, can reduce the assembly degree of difficulty like this, and after aiming at constant head tank 121, the locating plate inserts constant head tank 121 more easily, can not occupy too big space moreover, helps improving battery module 2's energy density.

In a specific embodiment, the first positioning member 21, preferably a positioning plate, extends in the longitudinal direction (Y) of the battery module 2, see fig. 5 and 6. Because battery module 2 is battery module 2 after the extension, extend through length direction (Y) that sets up the locating plate along battery module 2, can make the locating plate arrange on roughly whole battery module 2's length direction, with constant head tank 121 cooperation back, make battery module 2 atress balanced on whole length direction (Y), the local of battery module 2 can not appear vibrate, rock too big situation, thereby further improved the stability of battery module 2 after the installation.

Of course, in other embodiments, the positioning plate may be provided in a sectional structure.

In one specific embodiment, as shown in fig. 8, the position limiting beam 12 is provided with a positioning hole 122, and the positioning hole 122 and the positioning groove 121 are located on the same side of the position limiting beam 12.

In this embodiment, both sides of the limiting beam 12 are provided with the positioning holes 122 and the positioning grooves 121 at the same time, and such a structure can be applied to the situation of installing two battery modules 2 at the same time.

With continued reference to fig. 5 to 7, the battery module 2 is provided with a second positioning member 22, the second positioning member 22 being located on a first side of the battery module 2. The second positioning member 22 can be inserted into the positioning hole 122 and engaged with the positioning hole 122 when the battery module 2 is tilted to position the battery module 2 in the battery case 1.

In one particular embodiment, the second positioning member 22 is a positioning pin.

The positioning hole 122 is preferably a waist-shaped hole, and the long axis direction of the positioning hole 122 extends along the height direction (Z) of the battery module 2, so that the second positioning member 22 has enough movement space to avoid interference and influence on assembly in the process of obliquely installing the battery module 2 in the battery case 1.

As shown in fig. 5 and 7, in one specific embodiment, the first positioning member 21 is located higher than the second positioning member 22 in the height direction of the battery module 2. Thus, the first positioning member 21 is closer to the upper portion of the battery module 2, and the second positioning member 22 is closer to the bottom portion of the battery module 2. Referring to fig. 10 and 11, when the battery module 2 is inclined, it occupies more space in the width direction, and the larger the angle of inclination, the larger the occupied space. The first positioning member 21 is disposed further toward the upper portion, which is advantageous in that the first positioning member 21 can be inserted into the positioning groove 121 without having to tilt the battery module 2 at an excessively large angle, thereby saving labor in assembly. In addition, an overlarge space does not need to be reserved in the battery box body 1 for accommodating the inclined battery module 2, so that the design space of the battery box body 1 is saved, and the energy density of the battery pack is improved.

As shown in fig. 5 to 7 and 13, in one specific embodiment, the second side of the battery module 2 is provided with a hanging lug 23 along the width direction of the battery module 2. Battery box 1 is provided with fixing base 13, and fastener 3 passes hangers 23 and fixing base 13 to with battery module 2 and battery box 1 fixed connection. Since the battery module 2 is positioned and matched with the battery case 1 at the first side by the first positioning member 21, the fastening member 3 may not be provided in an excessive number as long as it can perform a fastening function. The reduction of 2 quantity of fasteners is favorable to improving the weight energy density and the volume energy density of battery package, also is favorable to improving the installation effectiveness of battery module, has reduced the cost of battery package.

In a specific embodiment, the position of the hanging lug 23 coincides with the height of the second positioning member 22 in the height direction of the battery module 2. Referring to fig. 7 and 13, the consistent height refers to the height when the central axis of the second positioning member 22 is parallel to the horizontal plane and the height when the central axis of the hanging lug 23 is parallel to the horizontal plane. The fixing base 13 may be integrally formed with the bottom plate 11, and the height of the hanging lug 23 is the same as the height of the second positioning component 22, which is also a position close to the bottom of the battery module 2. Therefore, the height of the fixed seat 13 does not need to be too high, and the structure of the battery box body is simplified. The position of fixed point is on the low side, also is favorable to the stability after battery module 2 fixes.

As shown in fig. 10 and 11, in one specific embodiment, the first side of one battery module 2 is disposed opposite to the first side of the other battery module 2 among the adjacent battery modules 2. That is, two battery modules 2 are disposed opposite to each other, and the same stopper beam 12 can position two battery modules at the same time. Likewise, the same fixing base 13 can also be used to simultaneously fixedly connect two battery modules 2.

As shown in fig. 12, in a specific embodiment, the battery pack further includes an elastic pad 4 disposed between the battery module 2 and the base plate 11, the elastic pad 4 being elastically deformable under the compression of the battery module 2. After the battery module 2 is positioned by the first positioning member 21 and the second positioning member 22, the elastic pad 4 is pressed. Behind hangers 23 and fixing base 13 fixed connection, cushion 4 is compressed tightly completely, and at this moment, first locating part 21 can further support tight spacing face 121b under cushion 4's effect, and battery module 2 is restricted on direction of height (Z), makes battery module 2's installation more reliable.

In one embodiment, the elastic pad 4 may be a heat conductive elastic pad, thereby facilitating heat dissipation of the battery module. In other embodiments, a liquid cooling plate is arranged between the elastic pad 4 and the bottom plate 11, and an elastic metal plate body with a certain radian is arranged between the liquid cooling plate and the bottom plate 11, so that the liquid cooling plate is ensured to be fully contacted with the battery module 2, and a good cooling effect is ensured. Meanwhile, the first positioning component 21 is ensured to abut against the limiting surface 121b under the action of the elastic plate.

In other embodiments, the battery case 1 is a liquid-cooled integrated case. Namely, the battery case 1 is integrated into a liquid-cooled plate. The liquid cooling plate is integrated on the battery box body 1, and the box wall of the battery box body 1 is used as a sealing wall of the liquid cooling plate, so that the whole weight and the material consumption can be reduced. On the other hand, the liquid-cooled panel does not need to be separately fixed, and the number of connecting parts can be reduced. The battery pack has the advantages of being beneficial to improving the energy density and the cost of the battery pack, and meanwhile, the production takt is beneficial to improving due to the fact that the number of parts is reduced.

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. A battery pack, comprising:

the battery box body (1), the battery box body (1) comprises a bottom plate (11) and a limiting beam (12) connected to the bottom plate (11); the battery pack comprises more than two battery modules (2), wherein each battery module (2) is respectively arranged in the battery box body (1); a first positioning component (21) is arranged on the first side of the battery module (2) along the width direction of the battery module (2);

the limiting beam (12) is provided with a positioning groove (121) matched with the first positioning part (21);

the first positioning component (21) can be inserted into the positioning groove (121) and matched with the positioning groove (121) when the battery module (2) inclines, so that the battery module (2) is positioned in the battery box body (1).

2. The battery pack according to claim 1, wherein the positioning groove (121) has an inclined guide surface (121a) therein, the guide surface (121a) being inclined downward in the height direction of the battery module (2).

3. The battery pack according to claim 1, wherein a stopper surface (121b) is provided in the positioning groove (121);

when the battery module (2) is positioned in the battery box body (1), the first positioning component (21) can be limited by the limiting surface (121 b).

4. The battery pack according to claim 1, wherein the first positioning member (21) is a positioning plate.

5. The battery pack according to claim 4, wherein the positioning plate extends in a length direction of the battery module (2).

6. The battery pack according to any one of claims 1 to 5, wherein the stopper beam (12) is provided with positioning holes (122), the positioning holes (122) being located on the same side of the stopper beam (12) as the positioning grooves (121);

the battery module (2) is provided with a second positioning component (22), and the second positioning component (22) is positioned on the first side of the battery module (2);

the second positioning component (22) can be inserted into the positioning hole (122) and matched with the positioning hole (122) when the battery module (2) inclines, so that the battery module (2) can be positioned in the battery box body (1).

7. The battery pack according to claim 6, wherein the second positioning member (22) is a positioning pin.

8. The battery pack according to claim 6, wherein the first positioning member (21) is located higher than the second positioning member (22) in the height direction of the battery module (2).

9. The battery pack according to claim 6, wherein a second side of the battery module (2) is provided with a hanging lug (23) in a width direction of the battery module (2);

the battery box body (1) is provided with a fixed seat (13);

fastener (3) pass hangers (23) with fixing base (13) to with battery module (2) with battery box (1) fixed connection.

10. The battery pack according to claim 9, wherein the position of the hanging lug (23) coincides with the height of the second positioning member (22) in the height direction of the battery module (2).

11. The battery pack according to claim 9, wherein the first side of one of the battery modules (2) is disposed opposite to the first side of the other battery module (2) among the adjacent battery modules (2).

12. The battery pack according to claim 1, further comprising an elastic pad (4) disposed between the battery module (2) and the base plate (11);

the elastic pad (4) can be elastically deformed under the extrusion of the battery module (2).

13. Battery pack according to claim 12, characterized in that a liquid-cooled plate is arranged between the resilient mat (4) and the bottom plate (11).

14. The battery pack according to claim 1, wherein the battery case (1) is a liquid-cooled integrated case.