Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack. The battery module comprises at least three battery packs, each battery pack comprises an even number of batteries arranged along a first direction, and all the battery packs are arranged along a second direction; the batteries of the same battery pack are electrically connected through the first chips; and one end of the second bar is electrically connected with the battery of one battery pack, and the other end of the second bar is electrically connected with the battery of the other battery pack. According to the utility model, the problem that the electric connection structure of the battery module of the battery pack in the prior art is unreasonable is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a battery module and battery pack. BACKGROUND

[0002] With the gradual expansion of commercial vehicle new energy market, the power battery pack product specially made for it is further put into market according to the demand of its high energy density. The battery pack in prior art usually includes the battery module formed by the electric connection of multiple batteries, and when the battery pack has multiple battery modules, multiple battery modules need to be connected through connecting rows, at this time, the connecting row cross-connection situation exists, thereby reducing the safety performance of the battery pack, and also increasing the number and length of connecting rows. At the same time, this also leads to the complexity of the electric connection line of the battery module, increases the space occupied by the connection line, and affects the energy density.

[0003] Therefore, the electric connection structure of the battery module of the battery pack in prior art is unreasonable. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a battery module and battery pack to solve the problem of unreasonable electric connection structure of the battery module of the battery pack in prior art.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, a battery module is provided, which comprises: at least three groups of battery groups, each group of battery groups comprising an even number of batteries arranged along a first direction, and all the battery groups arranged along a second direction; first bale pieces, the batteries of the same battery group are electrically connected through the first bale pieces; second bale pieces, one end of the second bale piece is electrically connected with the batteries of one of the battery groups, and the other end of the second bale piece is electrically connected with the batteries of another battery group.

[0006] Further, the battery groups are divided into at least two groups of first battery groups and one group of second battery groups, one end of the batteries of the first battery groups is electrically connected with the first bale pieces or the second bale pieces, and the other end is electrically connected with the second bale pieces; both ends of the batteries of the second battery groups are electrically connected with different first bale pieces.

[0007] Further, in the second direction, the second battery group is located at any one end of both ends of the battery module.

[0008] Further, the first battery groups are at least three groups, in the second direction, one end of the batteries of the two groups of first battery groups located at both ends is electrically connected with the first bale pieces, and the other end is electrically connected with the second bale pieces; both ends of the batteries of the remaining first battery groups are electrically connected with the second bale pieces.

[0009] Further, the battery pack comprises at least four groups of the first battery groups, all the first battery groups are divided into at least two parts, each part comprises at least two groups of the first battery groups, one end of the battery of the first battery group is electrically connected with the first bar piece or the second bar piece, and the other end is electrically connected with the second bar piece.

[0010] Further, at least one part of the first battery groups is at least three groups, in the second direction, one end of the battery of two groups of the first battery groups located at two ends is electrically connected with the first bar piece, and the other end is electrically connected with the second bar piece; the battery of the remaining first battery groups is electrically connected with the second bar piece at both ends.

[0011] Further, the battery module further comprises an end plate, in the first direction, the end part of the first battery group and the end part of the second battery group are connected with different end plates respectively, and the end part of the same end of the first battery group in the first direction is connected with the same end plate; or the end part of the same end of all the first battery groups and the second battery groups in the first direction is connected with the same end plate.

[0012] Further, the battery module further comprises an end plate, in the first direction, the end part of the first battery group and the end part of the second battery group are connected with different end plates respectively, and the end part of the same end of the first battery group in the first direction is connected with the same end plate; or the end part of the same end of all the first battery groups and the second battery groups in the first direction is connected with the same end plate.

[0013] According to another aspect of the utility model, a kind of battery pack is provided, and the battery pack includes above-mentioned battery module.

[0014] Further, the battery module is multiple, and multiple battery modules are arranged along the first direction.

[0015] The technical scheme of the utility model is applied, and the battery module in the application comprises at least three groups of battery groups, a first bar piece and a second bar piece. Each group of battery groups comprises an even number of batteries arranged along a first direction, and all the battery groups are arranged along a second direction. The batteries of the same battery group are electrically connected by the first bar piece. One end of the second bar piece is electrically connected with the batteries of one of the battery groups, and the other end of the second bar piece is electrically connected with the batteries of another battery group.

[0016] When the battery module in the application is used, since the battery module has the first and second bars, and since one end of the second bar is electrically connected with the battery of one battery pack and the other end of the second bar is electrically connected with the battery of another battery pack, the batteries of different battery packs can be electrically connected through the second bar. Therefore, in the process of arranging the connection rows, only two connection rows are needed to realize the electrical connection between the multiple battery packs and other structures in the battery pack for the multiple battery packs connected by the second bar. Therefore, the battery module in the application can effectively reduce the use of the connection rows, and thus can simplify the electrical connection structure in the battery pack and reduce the space occupied by the connection lines, which is beneficial to improve the energy density of the battery pack. Therefore, the battery module in the application effectively solves the problem of unreasonable electrical connection structure of the battery module of the battery pack in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings constituting a part of the specification illustrate the present application, the exemplary embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 Part of the structure schematic diagram of the battery pack of one specific embodiment of the application is shown;

[0019] Figure 2 Part of the structure schematic diagram of the battery module of the battery pack of another specific embodiment of the application is shown.

[0020] Among them, the above drawings include the following reference signs:

[0021] 10, battery module; 11, battery pack; 111, battery; 112, first battery pack; 113, second battery pack; 12, first bar; 13, second bar; 14, end plate; 20, head connection row; 30, middle connection row; 40, tail connection row. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in the application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0024] In the utility model, in the case that no opposite statement is made, the orientation words such as ''up, down, top, bottom'' used are usually in the direction shown in the drawing, or in the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, ''inner, outer'' refers to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0025] In order to solve the problem of unreasonable electric connection structure of the battery module of the battery pack in the prior art, the application provides a battery module and a battery pack.

[0026] In a first aspect, the application provides a battery module 10.

[0027] The battery module 10 in the application comprises at least three groups of battery groups 11, a first bar piece 12 and a second bar piece 13. Each group of battery groups 11 comprises an even number of batteries 111 arranged in a first direction, and all the battery groups 11 are arranged in a second direction; the batteries 111 of the same battery group 11 are electrically connected through the first bar piece 12; one end of the second bar piece 13 is electrically connected with the batteries 111 of one of the battery groups 11, and the other end of the second bar piece 13 is electrically connected with the batteries 111 of another battery group 11.

[0028] When the battery module in the application is used, since the battery module 10 has the first bar piece 12 and the second bar piece 13, and since one end of the second bar piece 13 is electrically connected with the batteries 111 of one of the battery groups 11, and the other end of the second bar piece 13 is electrically connected with the batteries 111 of another battery group 11, the batteries 111 of different battery groups 11 can be electrically connected through the second bar piece 13. Therefore, in the process of setting the connection rows, for the plurality of battery groups 11 connected by the second bar piece 13, only two connection rows are needed to realize the electrical connection between the plurality of battery groups 11 and other structures in the battery pack. Therefore, the battery module in the application can effectively reduce the use of connection rows, and further can simplify the electrical connection structure in the battery pack and reduce the space occupied by the connection lines, which is beneficial to improve the energy density of the battery pack. Therefore, the battery module in the application effectively solves the problem of unreasonable electrical connection structure of the battery module of the battery pack in the prior art.

[0029] Alternatively, the first direction and the second direction are perpendicular to each other, and the batteries 111 of at least two different battery groups 11 opposite in the second direction are electrically connected through the second bar piece 13. And in the application, the connection direction of the first bar piece 12 is the first direction, and the connection direction of the second bar piece 13 is the second direction. Or in other words, in the application, the first bar piece 12 is arranged in the first direction, and the second bar piece 13 is arranged in the second direction. Figure 1In this design, the first plate 12 is connected horizontally, while the second plate 13 is connected vertically. Of course, the connection direction of the first plate 12 and the second plate 13 can be adapted to different design requirements in this application.

[0030] In one embodiment of this application, the battery pack 11 is divided into at least two first battery packs 112 and one second battery pack 113. One end of the battery 111 of the first battery pack 112 is electrically connected to the first plate 12 or the second plate 13, and the other end is electrically connected to the second plate 13. The two ends of the battery 111 of the second battery pack 113 are respectively electrically connected to different first plates 12.

[0031] Optionally, in the second direction, the second battery pack 113 is located at either end of the battery module 10.

[0032] like Figure 1 As shown, taking the battery pack 11 divided into two groups of first battery packs 112 and one group of second battery packs 113 as an example, both groups of first battery packs 112 and one group of second battery packs 113 include an even number of batteries 111 arranged along a first direction. In the two groups of first battery packs 112, batteries 111 from two adjacent groups in the second direction are connected by a second connector 13, while batteries 111 from the same group in the first direction are electrically connected by a first connector 12. In the second direction, one group of second battery packs 113 is located at one end of the battery module 10, and the two ends of the batteries 111 in the second battery pack 113 are electrically connected to different first connectors 12. This arrangement allows the two groups of first battery packs 112 to form a multi-row module, while the one group of second battery packs 113 forms a single-row module. Furthermore, the negative terminal of a multi-row module composed of two sets of first battery packs 112 can be connected to the positive terminal of a single-row module composed of a set of second battery packs 113 via a connecting strip. Simultaneously, the positive terminal of the multi-row module composed of two sets of first battery packs 112 serves as the overall positive output terminal of the battery pack formed by the battery module 10, and the negative terminal of the single-row module composed of a set of second battery packs 113 serves as the overall negative output terminal of the battery pack formed by the battery module 10. This arrangement, on the one hand, ensures that the overall positive and negative output terminals of the battery pack formed by the battery module 10, as well as the positive and negative output terminals of the first and second battery packs 112 and 113, are located diagonally around the perimeter of the battery pack, improving space utilization. On the other hand, it enables the overall positive and negative output terminals of the battery pack formed by the battery module 10 to be located on the same side along a first direction.

[0033] Optionally, the first battery group 112 is at least three groups (not shown in the figure), and in the second direction, one end of the battery 111 of the two groups of first battery group 112 located at both ends is electrically connected with the first bar 12, and the other end is electrically connected with the second bar 13; both ends of the battery 111 of the remaining first battery group 112 are electrically connected with the second bar 13.

[0034] In the embodiment, the structure that the plurality of first battery groups 112 are connected by the first bar 12 and the second bar 13 can form a multi-row module, or in other words, at this time, all the batteries 111 of the plurality of first battery groups 112 can be connected in series in the first direction and the second direction by being alternately bent. At this time, since the plurality of first battery groups 112 form a multi-row module, the two ends of the whole plurality of first battery groups 112 in the first direction are respectively led out only one positive electrode connection part and one negative electrode connection part, which are used to connect with the positive electrode or the negative electrode of other battery modules 10, or used to connect with the second battery group 113 of the same battery module 10, or used to form the total output positive electrode or the total output negative electrode of the battery pack. When the positive electrode connection part and the negative electrode connection part are used to connect with the positive electrode or the negative electrode of other battery modules 10, since each first battery group 112 includes an even number of batteries 111 arranged in the first direction, it can be ensured that the positive electrode connection part and the negative electrode connection part are located on both sides of the battery pack formed by the battery module 10 in the second direction, and will not be located in the middle of the battery pack formed by the battery module 10, thereby not affecting the arrangement of the control panel circuit, the plug-in and the after-sales maintenance operation, and reducing the electromagnetic influence of high-voltage connection on low-voltage communication.

[0035] Optionally, the battery module 10 further comprises an end plate 14, and in the first direction, the end of the first battery group 112 and the end of the second battery group 113 are respectively connected with different end plates 14, and the ends of the same end of the first battery group 112 are connected with the same end plate 14. Of course, in the present application, for the same battery module 10, all the end plates 14 located at the same end of the battery module 10 can be designed as a whole, that is, the ends of the same end of all the first battery group 112 and the second battery group 113 are connected with the same end plate 14.

[0036] Optionally, both ends of the second bar 13 are electrically connected with the batteries 111 of the adjacent two groups of battery groups 11. That is, in the present application, the two ends of the second bar 13 will not span multiple battery groups 11, or in other words, the second bar 13 is only used for electrical connection of the adjacent two batteries 111 in the second direction.

[0037] As Figure 2As shown, in another embodiment of this application, the battery pack 11 includes at least four sets of first battery packs 112. All the first battery packs 112 are divided into at least two parts, and each part includes at least two sets of first battery packs 112. One end of the battery 111 of the first battery pack 112 is electrically connected to the first plate 12 or the second plate 13, and the other end is electrically connected to the second plate 13.

[0038] It is understood that the second battery pack 113 is not included in this embodiment.

[0039] like Figure 2 As shown, taking battery pack 11 as an example, which includes four sets of first battery packs 112, and each set of first battery packs 112 is divided into two parts, with each part including two sets of first battery packs 112, all first battery packs 112 include an even number of batteries 111 arranged along the first direction. In each part, the batteries 111 of two adjacent sets of first battery packs 112 in the second direction are connected by a second tab 13, while the batteries 111 of the same set in the first direction are electrically connected by a first tab 12. This arrangement allows the two sets of first battery packs 112 in each part to form a multi-row module, so battery module 10 includes two multi-row modules, which are arranged at intervals along the second direction. Furthermore, the negative electrode of one multi-row module and the positive electrode of the other multi-row module can be connected by a connecting strip. At the same time, the positive electrode of one multi-row module serves as the total output positive electrode of the battery pack formed by battery module 10, and the negative electrode of the other multi-row module serves as the total output negative electrode of the battery pack formed by battery module 10. This configuration achieves the same effect as the previous embodiment, that is, the total output positive terminal and the total output negative terminal of the battery pack formed by the battery module 10 are located on the same side along the first direction.

[0040] Optionally, at least a portion of the first battery pack 112 consists of at least three packs (not shown in the figure). In the second direction, one end of the battery 111 of the two first battery packs 112 located at both ends is electrically connected to the first plate 12, and the other end is electrically connected to the second plate 13; both ends of the battery 111 of the remaining first battery pack 112 are electrically connected to the second plate 13.

[0041] Optionally, the battery module 10 further includes an end plate 14. In the first direction, the ends of different portions of the first battery pack 112 are connected to different end plates 14, and the end of each portion of the first battery pack 112 is connected to the same end plate 14. Of course, in this application, for the same battery module 10, all the end plates 14 located at the same end of the battery module 10 can be designed as a whole, that is, the ends of all the first battery packs 112 at the same end in the first direction are connected to the same end plate 14.

[0042] A second aspect of this application provides a battery pack including the battery module of any of the above embodiments.

[0043] Optionally, there are multiple battery modules 10, which are spaced apart along the first direction. This arrangement not only makes more efficient use of the internal space of the battery pack and improves the energy density of the battery pack, but also makes it easier to connect different battery modules 10, and reduces the use of electrical connectors, thereby reducing the production cost of the battery pack.

[0044] like Figure 1 and Figure 2 As shown, taking two battery modules 10 as an example, the battery pack has two battery modules 10. One battery module 10 has a head connection bar 20 at the end away from the other battery module 10, and two middle connection bars 30 between the two modules. The other battery module 10 has a tail connection bar 40 at the end away from the battery module 10 connected to the head connection bar 20. In the middle of the battery pack, the positive terminal of one battery module 10 and the negative terminal of the other battery module 10 are located on one side of the battery pack in a second direction and are connected by a middle connection bar 30; the negative terminal of one battery module 10 and the positive terminal of the other battery module 10 are located on the other side of the battery pack in a second direction and are connected by another middle connection bar 30. The tail connection bar 40 is used to connect multiple rows of modules and single rows of modules within the same battery module 10, or the tail connection bar 40 is used to connect multiple rows of modules and multiple rows of modules within the same battery module 10. The first connecting strip 20 is used to connect the positive and negative terminals of the battery pack formed by the connection of two battery modules 10. In other words, the first connecting strip 20 actually consists of two parts, which are electrically connected through the battery modules 10, allowing one part to serve as the positive terminal and the other as the negative terminal. This arrangement effectively reduces bridging of the connecting strips, increases battery pack safety, and reduces the number and length of connecting strips, thus lowering costs. Specifically, this arrangement places the middle connecting strip 30 on both sides of the battery modules 10 in the second direction, without affecting the layout, wiring, and after-sales maintenance of the control board. Furthermore, the middle connecting strip 30 has the shortest straight-line connection travel, reducing its weight and cost, minimizing the risk of high-voltage crossover, and increasing overall safety.

[0045] At the same time, this arrangement ensures that the total positive and negative output terminals of the battery pack are located on the same side of the battery pack.

[0046] Optionally, the number of the batteries 111 of all the battery groups 11 is equal. In the present application, the number of the battery groups 11 of different battery modules 10 is equal. By setting in this way, not only the stability of the electrical connection between different battery modules 10 can be ensured, but also the overall structure of the battery module 10 is more regular, which is more convenient for the layout of the internal structure of the battery pack, makes the internal structure of the battery pack more compact, and is conducive to the miniaturization design of the battery pack.

[0047] At the same time, in order to ensure the connecting effect of the second bar 13 and reduce the length of the second bar 13, for the battery groups 11 arranged in the second direction, the different batteries 111 of different battery groups 11 are one-to-one corresponding, and the connecting lines of the corresponding batteries 111 of the plurality of battery groups 11 are parallel to the second direction, or the plurality of batteries 111 are coincident or approximately coincident in the first direction.

[0048] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0049] 1. Effectively solve the problem of unreasonable electrical connection structure of the battery module of the battery pack in the prior art;

[0050] 2. Simple structure and stable performance.

[0051] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0052] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0053] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0054] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. 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 module, characterized in that, include: At least three battery packs (11), each battery pack (11) comprising an even number of batteries (111) arranged along a first direction, and all of the battery packs (11) arranged along a second direction; The first tab (12) is used to electrically connect the batteries (111) of the same battery pack (11); The second pad (13) has one end electrically connected to the battery (111) of one of the battery packs (11), and the other end electrically connected to the battery (111) of the other battery pack (11).

2. The battery module according to claim 1, characterized in that, The battery pack (11) is divided into at least two first battery packs (112) and one second battery pack (113). One end of the battery (111) of the first battery pack (112) is electrically connected to the first electrode (12) or the second electrode (13), and the other end is electrically connected to the second electrode (13); The two ends of the battery (111) of the second battery pack (113) are electrically connected to different first plates (12).

3. The battery module according to claim 2, characterized in that, In the second direction, the second battery pack (113) is located at either end of the battery module.

4. The battery module according to claim 2, characterized in that, The first battery pack (112) consists of at least three groups. In the second direction, one end of the battery (111) of the two sets of first battery packs (112) located at both ends is electrically connected to the first plate (12), and the other end is electrically connected to the second plate (13); both ends of the remaining first battery packs (112) are electrically connected to the second plate (13).

5. The battery module according to claim 1, characterized in that, The battery pack (11) includes at least four first battery packs (112), and all the first battery packs (112) are divided into at least two parts, each part including at least two first battery packs (112). One end of the battery (111) of the first battery pack (112) is electrically connected to the first electrode (12) or the second electrode (13), and the other end is electrically connected to the second electrode (13).

6. The battery module according to claim 5, characterized in that, At least a portion of the first battery pack (112) consists of at least three packs. In at least three sets of the first battery packs (112), in the second direction, one end of the battery (111) of the two sets of the first battery packs (112) located at both ends is electrically connected to the first plate (12), and the other end is electrically connected to the second plate (13); both ends of the battery (111) of the remaining first battery packs (112) are electrically connected to the second plate (13).

7. The battery module according to any one of claims 2 to 4, characterized in that, The battery module also includes an end plate (14). In the first direction, the ends of the first battery pack (112) and the second battery pack (113) are respectively connected to different end plates (14), and the ends of the first battery pack (112) at the same end in the first direction are connected to the same end plate (14); or All the first battery packs (112) and the second battery packs (113) are connected to the same end plate (14) at the same end in the first direction.

8. The battery module according to any one of claims 5 to 6, characterized in that, The battery module also includes an end plate (14). In the first direction, the ends of different portions of the first battery pack (112) are connected to different end plates (14), and the ends of each portion of the first battery pack (112) are connected to the same end plate (14); or All of the first battery packs (112) are connected to the same end plate (14) at the same end in the first direction.

9. A battery pack, characterized in that, The battery pack includes the battery module as described in any one of claims 1 to 8.

10. The battery pack according to claim 9, characterized in that, There are multiple battery modules, and the multiple battery modules are spaced apart along a first direction.

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