Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, and relates to the technical field of batteries. The plurality of battery cells are stacked along a first direction, the plurality of battery cells are connected in series, any battery cell comprises a first pole and a second pole, and the polarities of the first pole and the second pole are opposite; the first pole of one of two battery cells located on the edge in the first direction in the multiple battery cells is connected with the first interface, the second pole of the other battery cell is connected with the second interface through the adapter, and the first interface and the second interface are located on the same side of the whole formed by the multiple battery cells in the first direction. According to the battery module, the first interface and the second interface are located on the same side of the whole of the multiple battery core components in the first direction, connection between the battery modules can be facilitated, the battery modules of different specifications do not need to be arranged, when the battery modules are assembled, only one replacement tool or clamp needs to be prepared, and the replacement efficiency is improved. And the production efficiency of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module and a battery pack. Background Art

[0002] With the development of battery technology, battery packs are used more and more widely. Existing battery packs generally include a box and multiple battery modules. The multiple battery modules are arranged inside the box, and the multiple battery modules are connected in series. Due to the internal space of the box and the need to avoid other structures, the high-voltage lead-out position and the low-voltage lead-out position of the battery module are different. In order to facilitate the series connection between battery modules, battery modules of different specifications will be arranged in the battery pack to facilitate the connection between battery modules. In this way, when manufacturing battery packs, battery modules of different specifications need to be prepared, which requires the replacement of tooling or fixtures when assembling battery modules of different specifications, reducing the production efficiency of the battery pack. Utility Model Content

[0003] In view of this, the present application provides a battery module and a battery pack to solve the problem that when manufacturing battery packs, battery modules of different specifications need to be prepared, which requires replacement of tooling or fixtures during battery pack assembly, thereby reducing the production efficiency of the battery pack.

[0004] According to one aspect of the present application, a battery module is provided, the battery module comprising a plurality of battery cells, a first interface, a second interface and an adapter, the plurality of battery cells are stacked along a first direction, the plurality of battery cells are connected in series, any of the battery cells comprises a first pole and a second pole, and the polarities of the first pole and the second pole are opposite;

[0005] The first pole included in one of the two battery cells located on the edge of the multiple battery cells in the first direction is connected to the first interface, and the second pole included in the other battery cell is connected to the second interface through the adapter, and the first interface and the second interface are located on the same side of the first direction of the whole formed by the multiple battery cells.

[0006] Preferably, the adapter is located at one side of the plurality of battery cells in the second direction, any of the plurality of battery cells is bonded to the adapter, and the second direction is perpendicular to the first direction.

[0007] Preferably, the battery module further comprises two FPCs, which are respectively arranged on both sides of the whole body formed by the plurality of battery cells in a third direction, and the third direction is respectively perpendicular to the first direction and the second direction;

[0008] The FPC includes a board body and a connection port, wherein the connection port is arranged on the board body, and the two connection ports included in the two FPCs are located on the same side of the whole body formed by the multiple battery cells in the first direction.

[0009] Preferably, the first interface, the second interface and the two connection ports are located on the same side of the whole formed by the multiple battery cells in the first direction.

[0010] According to another aspect of the present application, a battery pack is provided, comprising the above-mentioned battery module.

[0011] Preferably, the battery pack further comprises a box body and a support beam, and both ends of the support beam are connected to the inner side wall of the box body;

[0012] The battery pack includes a predetermined number of battery modules, which are respectively arranged on both sides of the support beam, and the first interface and the second interface included in any battery module are both facing the support beam.

[0013] Preferably, the battery pack further comprises a connector, through which the predetermined number of battery modules are connected in series, and the connector is located above the support beam.

[0014] Preferably, the battery pack further comprises a plurality of supporting beams, the plurality of supporting beams all extend along the first direction, any of the supporting beams is connected to the inner side wall of the box body, and the supporting beams intersect with the support beams;

[0015] The supporting beam and the support beam divide the interior of the box into a predetermined number of placement cavities, and the predetermined number of battery modules are respectively arranged in the predetermined number of placement cavities.

[0016] Preferably, the battery modules located on the same side of the support beam in the first direction are divided into multiple groups, each group includes two battery modules, and the two battery modules in each group are connected to the same BMS slave board, and the BMS slave board is arranged on the supporting beam between the two battery modules.

[0017] Preferably, the battery pack also includes a sampling harness, and the two first interfaces and the two second interfaces included in the two battery modules in each group are connected to the BMS slave board through the sampling harness, part of the sampling harness is located on the support beam, and the other part of the sampling harness is located on the supporting beam.

[0018] In the battery module of the present application, multiple battery cells are stacked along the first direction, and multiple battery cells are connected in series. The first pole in a battery cell located at the edge of the multiple battery cells in the first direction is connected to the first interface, and the second pole in another battery cell is connected to the second interface through an adapter. The first interface and the second interface used as the positive electrode interface and the negative electrode interface of the entire battery module are located on the same side of the first direction of the entire multiple battery cell components, which can meet the connection between battery modules. In this way, there is no need to set battery modules of different specifications in the battery pack. When assembling the battery module, only one replacement tool or fixture needs to be prepared, which improves the production efficiency of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram showing a battery module according to an embodiment of the present utility model;

[0021] Figure 2 A schematic diagram showing the structure of a battery pack according to an embodiment of the present utility model;

[0022] Figure 3 A diagram showing the relative positions of the box, support beams and bearing beams;

[0023] Figure 4 A schematic diagram showing a three-dimensional structure of a partial structure of a battery pack;

[0024] Figure 5 A schematic diagram of a planar structure showing a partial structure of a battery pack from one perspective;

[0025] Figure 6 Show Figure 5 A magnified view of part A;

[0026] Figure 7 A schematic plan view showing a partial structure of a battery pack from another perspective;

[0027] Figure 8 Show Figure 7 Enlarged view of part B.

[0028] Icons: 1-battery module; 11-first interface; 12-second interface; 13-battery cell; 14-adapter; 141-first adapter; 142-second adapter; 143-third adapter; 15-FPC; 151-board body; 152-connection port; 16-pull bar; 2-first cover plate; 3-box; 4-support beam; 5-support beam; 6-connector; 7-BMS slave board; 8-sampling harness; L1-first direction; L2-second direction; L3-third direction. DETAILED DESCRIPTION

[0029] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0030] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0031] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0032] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0033] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0034] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0035] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0036] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0037] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0038] The following will be combined Figures 1 to 8 The battery module 1 and the battery pack of the present application are described. Figures 1 to 8In the embodiment, the first direction L1, the second direction L2 and the third direction L3 are perpendicular to each other, the first direction L1 is parallel to the height direction of the battery cell 13, the second direction L2 is parallel to the width direction of the battery, and the third direction L3 is parallel to the length direction of the battery cell 13.

[0039] like Figure 1 As shown, the battery module 1 includes a plurality of battery cells 13, a first interface 11, a second interface 12 and an adapter 14, the plurality of battery cells 13 are stacked along a first direction L1, the plurality of battery cells 13 are connected in series, any battery cell 13 includes a first pole and a second pole, and the polarities of the first pole and the second pole are opposite; the first pole included in one of the two battery cells 13 located on the edge of the plurality of battery cells 13 in the first direction L1 is connected to the first interface 11, and the second pole included in the other battery cell 13 is connected to the second interface 12 through the adapter 14, and the first interface 11 and the second interface 12 are located on one side of the whole formed by the plurality of battery cells 13 in the first direction L1.

[0040] In the battery module 1 of the present application, the number of battery cells 13 in the battery module 1 can be an odd number, and the multiple battery cells 13 are stacked and arranged along the first direction L1, and the multiple battery cells 13 are connected in series. The first pole in a battery cell 13 located at the edge of the multiple battery cells 13 in the first direction L1 is connected to the first interface 11, and the second pole in another battery cell 13 is connected to the second interface 12 through the adapter 14. The first interface 11 and the second interface 12 used as the positive electrode interface and the negative electrode interface of the entire battery module 1 are located on the same side of the entire multiple battery cell 13 components in the first direction L1, which can meet the connection requirements between battery modules 1 and battery modules 1. In this way, there is no need to set battery modules 1 of different specifications in the battery pack. When assembling the battery module 1, only one replacement tool or fixture needs to be prepared, which improves the production efficiency of the battery pack.

[0041] like Figure 1 As shown, the two first poles of two adjacent battery cells 13 are located on different sides, the first pole of the first battery cell 13 located on the far left is connected to the first interface 11, the second pole of the first battery cell 13 located on the far left is electrically connected to the first pole of the second battery cell 13, and so on. The multiple battery cells 13 are connected in series in sequence, and the second pole of the battery cell 13 located on the far right is connected to the second interface 12 through the adapter 14, so that the first interface 11 and the second interface 12 are both located on the same side of the first direction L1 of the whole formed by the multiple battery cells 13, so as to facilitate the connection between battery modules 1 and battery modules 1.

[0042] Optionally, the first pole is a positive pole, and the second pole is a negative pole.

[0043] In an embodiment of the present application, the battery module 1 also includes a pull rod 16, which is arranged on one side of the whole formed by multiple battery modules 1 in the second direction L2, and the pull rod 16 extends along the first direction L1. Each battery cell 13 is bonded to the pull rod 16 to ensure relative fixation between the multiple battery cells 13.

[0044] Further, the adapter 14 includes a first adapter portion 141, a second adapter portion 142 and a third adapter portion 143 connected in sequence, the first adapter portion 141 is connected to the second pole of the battery cell 13 located at the far right, the second adapter portion 142 extends along the first direction L1, each battery cell 13 is bonded to the second adapter portion 142, and the third adapter portion 143 is connected to the second interface 12. When each battery cell 13 is bonded to the second adapter portion 142, a pull bar 16 can be omitted.

[0045] Optionally, the adapter 14 is a copper bar, and a surface of the copper bar has an insulating layer.

[0046] In the embodiment of the present application, the battery module 1 also includes two FPCs 15, which are respectively arranged on both sides of the whole body composed of multiple battery cells 13 in the third direction L3, and the battery cells 13 can be connected to the FPCs 15 on both sides respectively. The FPC 15 includes a board body 151 and a connection port 152, and the connection port 152 is arranged on the board body 151. The board body 151 is bent so that the two connection ports 152 are located on the same side of the whole body composed of multiple battery cells 13 in the first direction L1. In this way, the two connection ports 152 are located on the same side, which can facilitate the connection of the two connection ports 152 to the BMS slave board 7 through the wiring harness.

[0047] Optionally, the first interface 11, the second interface 12 and the two connection ports 152 are located on the same side of the first direction L1 of the whole formed by the multiple battery cells 13. In this way, the connector 6 used to connect the battery modules 1 and the wiring harness used to connect with the connection ports 152 can occupy the space on the same side to improve the space utilization inside the battery pack.

[0048] According to another aspect of the present application, a battery pack is provided, which includes the above-mentioned battery module 1 and has the same technical effects as the above-mentioned battery module 1, which will not be described in detail here.

[0049] Furthermore, if Figures 2 to 8 As shown, the battery pack also includes a box body 3, a first cover plate 2, and a second cover plate ( Figures 2 to 8 ), a support beam 4 and a plurality of supporting beams 5, the box body 3 is a hollow structure in the shape of a rectangular parallelepiped, and the first cover plate 2 and the second cover plate are respectively covered on the box body 3.

[0050] like Figure 3As shown, the support beam 4 extends along the third direction L3, and both ends of the support beam 4 are connected to the inner wall of the box body 3. The supporting beam 5 extends along the first direction L1, and both ends of the supporting beam 5 are connected to the inner wall of the box body 3. The supporting beam 5 intersects with the support beam 4, and the supporting beam 5 and the support beam 4 divide the interior of the box body 3 into a predetermined number of placement cavities. The battery pack may include a predetermined number of battery modules 1, and the predetermined number of battery modules 1 are respectively arranged in the predetermined number of placement cavities.

[0051] Optionally, the predetermined number may be 4, 8 or more.

[0052] In the embodiments of the present application, Figure 5 and Figure 6 As shown, the first interface 11 and the second interface 12 included in the battery modules 1 located on both sides of the support beam 4 are both facing the support beam 4, so that the first interface 11 and the second interface 12 included in a predetermined number of battery modules 1 are all located on the support beam 4, so that the battery modules 1 can be easily connected through the connector 6. The positions of the first interface 11 and the second interface 12 of the battery modules 1 located on both sides of the support beam 4 are opposite, that is, the first interface 11 of the upper battery module 1 is located on the left, the second interface 12 of the upper battery module 1 is located on the right, the first interface 11 of the lower battery module 1 is located on the right, and the second interface 12 of the lower battery module 1 is located on the left.

[0053] Optionally, the connector 6 may be a copper busbar.

[0054] like Figure 3 As shown, the second interface 12 of the upper leftmost battery module 1 is connected to the first interface 11 of the second battery module 1 through the connector 6, and so on, the battery modules 1 on the upper side are connected in sequence. The second interface 12 of the upper rightmost battery module 1 is connected to the first interface 11 of the lower rightmost battery module 1, and the battery modules 1 on the lower side are connected in sequence. The first interface 11 of the upper leftmost battery module 1 and the second interface 12 of the lower leftmost battery module 1 are connected to the positive and negative interfaces of the entire battery pack.

[0055] In the embodiments of the present application, Figures 4 to 6As shown, the number of battery modules 1 located on the same side of the support beam 4 in the first direction L1 is an even number, and the battery modules 1 located on the same side of the support beam 4 in the first direction L1 are divided into multiple groups, each group includes two battery modules 1, and the two battery modules 1 included in each group are connected to the same BMS slave board 7, and the BMS slave board 7 is set on the supporting beam 5 between the two battery modules 1. In this way, the sampling information of the two battery modules 1 in each group can be transmitted to the BMS slave board 7 nearby, and the BMS slave board 7 is set on the supporting beam 5 between the two battery modules 1, so that the internal space of the box body 3 can be fully utilized.

[0056] Furthermore, if Figure 7 and Figure 8 As shown, the battery pack also includes a sampling harness 8, and the two first interfaces 11 and the two second interfaces 12 included in the two battery modules 1 in each group are connected to the BMS slave board 7 through the sampling harness 8. Part of the sampling harness 8 is located on the support beam 4, and the other part of the sampling harness 8 is located on the support beam 5. In this way, the sampling harness 8 can use the space on the support beam 5 and the support beam 4, thereby improving the space utilization rate inside the box 3.

[0057] Optionally, the connector 6, the first interface 11, the second interface 12 and parts of the sampling harness 8 can be arranged in layers in the space on the support beam 4, thereby realizing space utilization and improving space utilization inside the box 3 without affecting installation.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery module, characterized in that: The battery module comprises a plurality of battery cells, a first interface, a second interface and an adapter, the plurality of battery cells are stacked along a first direction, the plurality of battery cells are connected in series, any of the battery cells comprises a first pole and a second pole, and the polarities of the first pole and the second pole are opposite; The first pole included in one of the two battery cells located on the edge of the multiple battery cells in the first direction is connected to the first interface, and the second pole included in the other battery cell is connected to the second interface through the adapter, and the first interface and the second interface are located on the same side of the first direction of the whole formed by the multiple battery cells.

2. The battery module according to claim 1, characterized in that: The adapter is located at one side of the plurality of battery cells in a second direction, any of the plurality of battery cells is bonded to the adapter, and the second direction is perpendicular to the first direction.

3. The battery module according to claim 2, characterized in that: The battery module further includes two FPCs, which are respectively arranged on both sides of the whole body formed by the plurality of battery cells in a third direction, and the third direction is respectively perpendicular to the first direction and the second direction; The FPC includes a board body and a connection port, wherein the connection port is arranged on the board body, and the two connection ports included in the two FPCs are located on the same side of the whole body formed by the multiple battery cells in the first direction.

4. The battery module according to claim 3, characterized in that: The first interface, the second interface and the two connection ports are located on the same side of the whole formed by the plurality of battery cells in the first direction.

5. A battery pack, characterized in that: The battery pack comprises the battery module according to any one of claims 1 to 4.

6. The battery pack according to claim 5, characterized in that: The battery pack further comprises a box body and a support beam, and both ends of the support beam are connected to the inner side wall of the box body; The battery pack includes a predetermined number of battery modules, which are respectively arranged on both sides of the support beam, and the first interface and the second interface included in any battery module are both facing the support beam.

7. The battery pack according to claim 6, characterized in that: The battery pack also includes a connector, through which the predetermined number of battery modules are connected in series, and the connector is located above the support beam.

8. The battery pack according to claim 6, characterized in that: The battery pack further includes a plurality of supporting beams, each of which extends along the first direction, and each of which is connected to the inner side wall of the box body, and the supporting beams intersect with the support beams; The supporting beam and the support beam divide the interior of the box into a predetermined number of placement cavities, and the predetermined number of battery modules are respectively arranged in the predetermined number of placement cavities.

9. The battery pack according to claim 8, characterized in that: The battery modules located on the same side of the support beam in the first direction are divided into multiple groups, each group includes two battery modules, and the two battery modules in each group are connected to the same BMS slave board, and the BMS slave board is arranged on the support beam between the two battery modules.

10. The battery pack according to claim 9, characterized in that: The battery pack also includes a sampling harness, and the two first interfaces and the two second interfaces included in the two battery modules in each group are connected to the BMS slave board through the sampling harness, part of the sampling harness is located on the support beam, and the other part of the sampling harness is located on the supporting beam.

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