Bracket-free battery module and battery pack with same

Abstract

The utility model provides a battery module without a support and a battery pack with the battery module, the battery module without the support comprises a shell, an end plate, a battery module and a battery pack, the shell is internally provided with the end plate; the battery cell is arranged in the shell, and the battery cell comprises a plurality of battery monomers; the bus bars are connected with the adjacent single batteries; the bracket is arranged between the busbar and the battery cell, the bracket is detachably connected with the end plate, the battery monomers are electrically connected through the busbar, and the bracket is separated from the end plate. According to the battery module without the bracket, the detachable bracket is arranged, so that the weight of the battery pack can be reduced, the lightweight manufacturing of the battery pack can be realized, the cost of the battery pack can be reduced, meanwhile, more arrangement space can be provided for the battery cells, and the energy density of the battery module without the bracket can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack manufacturing technical field especially is related to a battery module without support and battery pack with same. BACKGROUND

[0002] The battery module in prior art is generally provided with a support to support the busbar for the convenience of connecting the busbar with adjacent battery monomer, and the support and the battery cell are jointly arranged in the box, however, the support increases the weight of the battery module and the cost of the battery module. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art is solved, and for this purpose, the utility model provides a battery module without support, which can reduce the production cost of the battery module without support.

[0004] The utility model further provides a battery pack with the battery module without support.

[0005] The battery module without support according to the utility model embodiment comprises a shell, an end plate is arranged in the shell, a battery cell is arranged in the shell, the battery cell comprises a plurality of battery monomers, a busbar is connected with adjacent battery monomers, a support is arranged between the busbar and the battery cell, the support is detachably connected with the end plate, the battery monomers are electrically connected through the busbar, and the support is separated from the end plate.

[0006] The battery module without support according to the utility model can reduce the weight of the battery pack, realize lightweight manufacturing of the battery pack, reduce the cost of the battery pack, provide more arrangement space for the battery cell, and improve the energy density of the battery module without support.

[0007] According to some embodiments of the utility model, the number of the end plates is two, the two end plates define an installation space, the battery cell is arranged in the installation space, and the two ends of the support are screw-connected with the two end plates respectively.

[0008] According to some embodiments of the utility model, the support comprises a body, the body extends along the arrangement direction of the battery monomers, and the two ends of the body are connected with the end plates; a support plate is connected with one end of the body, the other end of the support plate extends into the shell along a direction perpendicular to the arrangement direction of the battery monomers, the number of the support plates is multiple, and the multiple support plates are arranged at intervals along the length direction of the body.

[0009] According to some embodiments of the utility model, one of the support and the busbar is provided with a limiting column and the other is provided with a limiting hole, and the limiting column is matched in the limiting hole.

[0010] According to some embodiments of the utility model, the support comprises: a first support and a second support, the first support and the second support are arranged at intervals along the width direction of the electric core, and the first support and the second support are respectively arranged on the upper side of the pole column on both sides of the battery monomer.

[0011] According to some embodiments of the utility model, the support-free battery module comprises: a base, the base is fixed on the end plate, and the base is used for fixing a low-voltage plug-in component and / or an output pole piece.

[0012] According to some optional embodiments of the utility model, the base is connected with the end plate through plug-in.

[0013] According to some embodiments of the utility model, the busbar is provided with a convex rib, and the convex rib protrudes towards the electric core along the thickness direction of the busbar.

[0014] According to some optional embodiments of the utility model, the support-free battery module comprises: a positioning member, the convex rib is provided with a positioning hole, the support is provided with a through hole corresponding to the positioning hole, and the positioning member passes through the positioning hole and the through hole to position the support and the busbar.

[0015] The battery pack according to the second aspect of the utility model comprises the support-free battery module according to the first aspect of the utility model.

[0016] According to the battery pack of the utility model, by arranging the support-free battery module of the first aspect of the utility model, a detachable support is arranged, so that the weight of the battery pack can be reduced, and the lightweight manufacturing of the battery pack can be realized, the cost of the battery pack can be reduced, and more arrangement space can be provided for the electric core, so that the energy density of the support-free battery module can be improved.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the support-free battery module according to the embodiments of the utility model;

[0019] Figure 2 is Figure 1 a schematic view of part of the structure of the support-free battery module shown in figure 1;

[0020] Figure 3 is an exploded view of a battery module without support shown in FIG. Figure 2

[0021] Figure 4 is a schematic view of a support, a positioning member and a busbar shown in FIG. Figure 3

[0022] Figure 5 is a schematic view of a busbar shown in FIG. Figure 3

[0023] Figure 6 is a schematic view of a support shown in FIG. Figure 3

[0024] Figure 7 is a schematic view of a base shown in FIG. Figure 3

[0025] Reference signs:

[0026] 100, a battery module without support;

[0027] 10, a shell; 11, an end plate;

[0028] 20, a battery cell;

[0029] 30, a busbar; 31, a protruding rib; 32, a limiting hole; 33, a positioning hole; 34, a photographing positioning hole;

[0030] 40, a support; 41, a body; 42, a support plate; 43, a limiting column;

[0031] 401, a first support; 402, a second support;

[0032] 50, a base;

[0033] 60, a positioning member;

[0034] 70, a low-voltage plug-in component. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0036] The following will be described with reference to the accompanying drawings. Figures 1-7 A battery module without support 100 according to an embodiment of the present application is described below.

[0037] Referring to Figure 1 , Figure 2 ,​​​​​Figure 3 and Figure 4 The battery module 100 without the support according to the embodiment of the utility model, comprising: shell 10, electric core 20, busbar 30 and support 40.

[0038] Specifically, the shell 10 is provided with an end plate 11; the electric core 20 is arranged in the shell 10, and the electric core 20 comprises a plurality of battery monomers, that is, the electric core 20 comprises two, three or four or more battery monomers; the busbar 30 is connected with adjacent battery monomers; the support 40 is arranged between the busbar 30 and the electric core 20, and the support 40 is detachably connected with the end plate 11, and when the battery monomers are electrically connected through the busbar 30, the support 40 is separated from the end plate 11.

[0039] For example, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the electric core 20 comprises a plurality of battery monomers, the busbar 30 is arranged along the front-rear direction, the busbar 30 is connected with two adjacent battery monomers in the front-rear direction, and the plurality of battery monomers are electrically connected through the plurality of busbars 30. Preferably, the busbar 30 is an aluminum bar, which is simple to obtain, so that the processing of the busbar can be facilitated, and at the same time, the aluminum material has a low resistance, so that the energy transmission efficiency of adjacent battery monomers can be ensured.

[0040] When assembling the battery module 100 without the support, the plurality of battery monomers are arranged in the shell 10 in groups, then the support 40 is arranged on the upper side of the battery monomers, then the busbar 30 is arranged on the upper side of the support 40, then the battery monomers are electrically connected through the busbar 30, and then the support 40 is separated from the end plate 11, so that the assembly of the battery module 100 without the support is completed.

[0041] The battery module 100 without the support of the utility model sets the detachable support 40, which can reduce the weight of the battery module 100 without the support after the assembly of the battery module 100 without the support is completed, so that the weight of the battery pack can be reduced, and the lightweight manufacturing of the battery pack can be realized, and the cost of the battery pack can be reduced. At the same time, compared with the prior art in which the support 40 is fixed with the end plate 11, the battery module 100 without the support of the application can save the arrangement space of the support 40, so that more arrangement space can be provided for the electric core 20, and the energy density of the battery module 100 without the support can be improved. In addition, the support 40 can be reused after being detached, so that the utilization rate of the support 40 structure can be improved, and the production cost can be further reduced.

[0042] According to the battery module 100 without support of the embodiment of the utility model, the detachable support 40 is arranged, so that the weight of the battery pack can be reduced, and then the lightweight manufacturing of the battery pack can be realized, and the cost of the battery pack can also be reduced, and meanwhile, more arrangement space can be provided for the battery cell 20, and then the energy density of the battery module 100 without support can be improved.

[0043] According to some embodiments of the utility model, referring to Figure 1 and Figure 2 , the number of the end plate 11 is two, the two end plates 11 define the mounting space, the battery cell 20 is arranged in the mounting space, and the two ends (such as the front end and the rear end of the support 40 shown in Figure 1 ) of the support 40 are respectively connected with the two end plates 11 in the form of screw connection. Therefore, the two end plates 11 define the mounting space of the battery cell 20, so that the arrangement of the battery cell 20 can be facilitated, and meanwhile, the end plate 11 is arranged, so that the fixing of the support 40 and the end plate 11 can be facilitated, and the connection position of the support 40 and the end plate 11 is reasonable, so that the arrangement of the battery cell 20 will not be affected.

[0044] For example, as shown in Figure 1 and Figure 2 , the two end plates 11 are arranged in the front-rear direction, the mounting space of the battery cell 20 is defined between the two end plates 11, the front end of the support 40 is connected with the front end plate 11, and the rear end of the support 40 is connected with the rear end plate 11.

[0045] According to some embodiments of the utility model, referring to Figure 3 , Figure 4 and Figure 6 , the support 40 comprises a body 41 and a support plate 42, the body 41 extends along the arrangement direction of the battery monomer, the two ends (such as the front end and the rear end of the body 41 shown in Figure 3 ) of the body 41 are connected with the end plate 11, one end of the support plate 42 is connected with the body 41, the other end of the support plate 42 extends into the shell 10 along the direction perpendicular to the arrangement direction of the battery monomer, and the number of the support plate 42 is multiple, that is, the number of the support plate 42 is two, three or four or more, and the multiple support plates 42 are arranged in the length direction (such as the front-rear direction of the body 41 shown in Figure 3 ) of the body 41.

[0046] In this way, the body 41 is arranged, the support 40 and the end plate 11 can be fixed through the body 41, so that the connection of the support 40 and the end plate 11 can be facilitated, and meanwhile, the support plate 42 is arranged, the support plate 42 can support the busbar 30, so that the welding of the busbar 30 and the pole of the battery monomer can be facilitated, and then the welding efficiency can be improved.

[0047] For example, as shown in Figure 3 , Figure 4 andFigure 6 As shown in the drawings, taking the right support 40 as an example, the body 41 extends horizontally in the front-rear direction, the front end of the body 41 is fixed with the front end plate 11, the rear end of the body 41 is fixed with the rear end plate 11, the right end of the support plate 42 is connected with the body 41, the left end of the support plate 42 extends to the left, the number of the support plates 42 is multiple, and the multiple support plates 42 are arranged in the front-rear direction at intervals, and the left support 40 and the right support 40 are arranged symmetrically in the left-right direction.

[0048] According to some embodiments of the present application, referring to Figure 4 , Figure 5 and Figure 6 , one of the support 40 and the busbar 30 is provided with the limiting column 43 and the other is provided with the limiting hole 32, that is, the support 40 can be provided with the limiting column 43 and the busbar 30 is provided with the limiting hole 32, or the busbar 30 is provided with the limiting column 43 and the support 40 is provided with the limiting hole 32, and the limiting column 43 is matched in the limiting hole 32. Therefore, when the busbar 30 is matched with the support 40, the matching of the limiting column 43 and the limiting hole 32 can limit the installation position of the busbar 30, so as to ensure that the busbar 30 and the support 40 can be matched to a reasonable position, and then the welding of the busbar 30 and the battery monomer can be facilitated.

[0049] For example, as shown in Figure 4 , Figure 5 and Figure 6 , taking the right support 40 as an example, the limiting column 43 is arranged on the right side edge of the support 40, and the limiting hole 32 is arranged on the right side edge of the right busbar 30, and when the busbar 30 is matched with the support 40, the limiting column 43 extends into the limiting hole 32, so as to limit the busbar 30.

[0050] According to some embodiments of the present application, referring to Figure 3 , Figure 4 and Figure 6 , the support 40 comprises: a first support 401 and a second support 402, the first support 401 and the second support 402 are arranged at intervals in the width direction of the battery cell 20 (such as the left-right direction of the battery cell 20 shown in Figure 3 ), and the first support 401 and the second support 402 are arranged on the upper side of the battery monomer on both sides of the pole. Since the two sides of the battery monomer in the width direction need to be electrically connected, the busbar 30 needs to be arranged on both sides of the battery monomer in the width direction, and thus the first support 401 and the second support 402 are arranged, which can support the corresponding busbar 30 at the position of the pole on each side, so as to ensure that the busbar 30 can be normally welded with the pole.

[0051] According to some embodiments of the present application, referring to Figure 3 , Figure 4 and Figure 7The battery module 100 without the support includes a base 50 fixed on the end plate 11, the base 50 being used for fixing the low-voltage plug-in 70 and / or the output pole piece. In the prior art, the low-voltage plug-in 70 is generally fixed on the battery cell 20 through the support 40. Since the support 40 of the present application is detachable, after the support 40 is detached, the base 50 is arranged to provide a fixing position for the low-voltage plug-in 70, so that the low-voltage plug-in 70 can be conveniently fixed. Meanwhile, the output pole piece can also be fixed through the base 50, so that the functional integration of the base 50 can be improved, and other mechanisms for fixing the output pole piece are not needed, thereby reducing the use of parts and production cost.

[0052] For example, as shown in Figure 3 , Figure 4 and Figure 7 , the base 50 is fixed on the front end plate 11, and the low-voltage plug-in 70 is fixed with the base 50, and the low-voltage plug-in 70 is in the structure of a flexible circuit board. Preferably, the base 50 is a plastic part, so that the plastic cost is low, and the base 50 can be conveniently used in batches, and meanwhile, the contact damage between the low-voltage plug-in 70 and the end plate 11 can be avoided.

[0053] According to some optional embodiments of the present application, as shown in Figure 2 and Figure 3 , the base 50 is connected with the end plate 11 in a plug-in manner. Thus, the plug-in connection is simple in connection form and convenient to operate, so that the connection efficiency of the base 50 and the end plate 11 can be improved.

[0054] According to some embodiments of the present application, as shown in Figure 3 and Figure 5 , the busbar 30 is provided with a protruding rib 31 protruding towards the battery cell 20 along the thickness direction of the busbar 30 (for example, the up-down direction of the busbar 30 as shown in Figure 3 ). Thus, the protruding rib 31 can strengthen the strength of the busbar 30, avoid damage to the busbar 30, so that the service life of the busbar 30 can be guaranteed, and the service life of the battery module 100 without the support can be improved. For example, as shown in Figure 3 and Figure 5 , the busbar 30 is provided with the protruding rib 31 protruding downwards.

[0055] According to some embodiments of the present application, as shown in Figure 3 , Figure 4 and Figure 5The battery module 100 without the support includes a positioning piece 60, the convex rib 31 is provided with a positioning hole 33, the support 40 is provided with a through hole corresponding to the positioning hole 33, and the positioning piece 60 positions the support 40 and the busbar 30 by penetrating the positioning hole 33 and the through hole. Therefore, by arranging the positioning piece 60, the support 40 and the busbar 30 can be accurately positioned and fixed, so that the busbar 30 and the pole of the battery monomer can be conveniently welded.

[0056] For example, as shown in Figure 3 、 Figure 4 and Figure 5 , the convex rib 31 is provided with a positioning hole 33 penetrating the convex rib 31 in the up-down direction, the number of the positioning hole 33 is two, the two positioning holes 33 are arranged in the left-right direction, the support plate 42 of the support 40 is provided with a through hole corresponding to the positioning hole 33, and the positioning piece 60 sequentially penetrates the positioning hole 33 and the through hole from top to bottom to position the busbar 30 and the support 40.

[0057] Further, as shown in Figure 3 and Figure 5 , the busbar 30 is provided with a photographing positioning hole 34, and the photographing positioning hole 34 can judge the position of the busbar 30 and the pole of the battery monomer by laser focusing.

[0058] According to the battery pack of the second aspect of the embodiment of the utility model, referring to Figure 1 、 Figure 2 and Figure 3 , the battery module 100 without the support of the first aspect of the embodiment is included.

[0059] According to the battery pack of the embodiment of the utility model, by arranging the battery module 100 without the support of the first aspect of the embodiment, the detachable support 40 is arranged, so that the weight of the battery pack can be reduced, and the lightweight manufacturing of the battery pack can be realized, the cost of the battery pack can be reduced, and more arrangement space can be provided for the battery cell 20, so that the energy density of the battery module 100 without the support can be improved.

[0060] In assembling the battery module 100 without the bracket, first, the battery cell 20 is arranged in the mounting space defined by the front and rear end plates 11, then the first bracket 401 is arranged on the upper side of the battery cell 20 and located on the left side of the battery cell 20, the front and rear ends of the first bracket 401 are respectively connected with the front and rear end plates 11 through screw connection, at the same time, the second bracket 402 is arranged on the upper side of the battery cell 20 and located on the right side of the battery cell 20, the front and rear ends of the second bracket 402 are respectively connected with the front and rear end plates 11 through screw connection, then the busbar 30 is arranged on the upper side of the bracket 40, it is needed to note that the positioning hole 33 at the position of the convex rib 31 of the busbar 30 corresponds with the through hole, then the positioning member 60 is sequentially arranged from top to bottom through the positioning hole 33 and the through hole, then the pole of the adjacent battery monomer is welded through the busbar 30, then the positioning member 60 is disassembled, finally, the first bracket 401 and the second bracket 402 are disassembled from the end plate 11, at this time, the assembling of the battery module 100 without the bracket is completed.

[0061] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0062] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0063] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through an intermediate medium, or the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without mutual contradiction.

[0065] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery module without a bracket, characterized in that: include: a housing, wherein an end plate is provided in the housing; A battery cell, the battery cell being disposed in the housing and comprising a plurality of battery cells; a busbar connecting adjacent battery cells; The bracket is provided between the busbar and the battery cell, the bracket is detachably connected to the end plate, and the bracket is separated from the end plate when the battery cells are electrically connected through the busbar.

2. The bracket-less battery module according to claim 1, characterized in that: There are two end plates, and the two end plates define an installation space. The battery cell is arranged in the installation space, and both ends of the bracket are screwed to the two end plates respectively.

3. The bracket-free battery module according to claim 1 or 2, characterized in that: The bracket comprises: A body extending along the arrangement direction of the battery cells, with both ends of the body connected to the end plates; A support plate, one end of which is connected to the body, and the other end of which extends toward the inside of the shell in a direction perpendicular to the arrangement of the battery cells. There are multiple support plates, and the multiple support plates are arranged at intervals along the length direction of the body.

4. The bracket-less battery module according to claim 1, characterized in that: One of the bracket and the busbar is provided with a limiting column and the other is provided with a limiting hole, and the limiting column is fitted into the limiting hole.

5. The battery module without a bracket according to claim 1, characterized in that: The bracket includes: a first bracket and a second bracket, the first bracket and the second bracket are arranged at intervals along the width direction of the battery cell, and the first bracket and the second bracket are respectively arranged on the upper side of the poles on both sides of the battery cell.

6. The bracket-less battery module according to claim 1, characterized in that: include: A base is fixed on the end plate, and the base is used to fix the low-voltage plug-in and / or the output pole piece.

7. The bracket-less battery module according to claim 6, characterized in that: The base is plug-connected to the end plate.

8. The bracket-less battery module according to claim 1, characterized in that: The busbar is provided with a convex rib, and the convex rib protrudes toward the battery core along the thickness direction of the busbar.

9. The bracket-less battery module according to claim 8, characterized in that: The utility model comprises: a positioning member, a positioning hole is provided on the convex rib, a through hole corresponding to the positioning hole is provided on the bracket, and the positioning member passes through the positioning hole and the through hole to position the bracket and the bus bar.

10. A battery pack, characterized in that: A battery module without a support according to any one of claims 1 to 9.

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