Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack, the battery module comprises: a battery monomer, which is provided with a shell and a pole; and the connecting piece is arranged on the battery monomer, the connecting piece is provided with a connecting part and an insulating part, the connecting part is connected with the pole, the insulating part is connected with the shell, and the connecting piece is fixed on the insulating rod. According to the battery module disclosed by the utility model, the connecting pieces are arranged on the battery monomers, so that electric connection and mounting and fixing functions are integrated, the battery monomers can be independently disassembled, maintained and replaced, the space volume of the battery module is reduced, the structure is simple, the universalization degree of parts is high, and the maintenance mode is simple; and the production cost and the maintenance cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a battery module and a battery pack. Background Art

[0002] In the related art, it is pointed out that the current development trend of power batteries and energy storage systems is to simplify structural components. Then, some modules are directly put into the box, and the CTP scheme fixed by gluing is widely used. Especially for energy storage battery cells, the capacity of a single battery cell is very large, usually more than 300Ah, and even more than 1000Ah in some large cases. The value of a single battery cell is very high. The PACK adopts the CTP technology and the electrical connection adopts aluminum bar welding. With the CTP + electrical connection welding scheme, the battery cells are not detachable. When a single battery cell fails, the entire PACK needs to be replaced, resulting in high after-sales costs. Moreover, the existing detachable battery cell schemes are complex in design and difficult to actually apply and implement. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the utility model provides a battery module in which the battery cells can be separately disassembled, repaired and replaced.

[0004] The utility model also provides a battery pack having the above battery module.

[0005] The battery module according to the first aspect of the utility model includes: battery cells, each of which has a housing and a terminal; a connecting member disposed on the battery cell, the connecting member having a connecting portion and an insulating portion, the connecting portion being connected to the terminal, the insulating portion being connected to the housing, and the connecting member being fixed on an insulating rod.

[0006] In the battery module according to the utility model, by providing a connecting member on the battery cell, the functions of electrical connection and installation fixation are integrated into one, realizing the separate disassembly, repair and replacement of the battery cells, reducing the space volume of the battery module, having a simple structure, a high degree of generalization of components, a simple maintenance method, and reducing the production cost and maintenance cost.

[0007] In some embodiments, the connecting portion of the connecting member extends in a first direction, the insulating portion extends in a second direction perpendicular to the first direction, and the connecting member further forms a fixing portion that extends in the first direction and is connected to a surface of the insulating portion facing away from the connecting portion.

[0008] In some embodiments, the fixing portion is formed with a fixing hole that penetrates the fixing portion in the thickness direction of the fixing portion.

[0009] In some embodiments, the battery cells include a plurality of them, each battery cell includes two pole columns, and each battery cell is connected to at least one of the connecting members.

[0010] In some embodiments, every two of the plurality of battery cells form a group. The two battery cells in each group are connected to each other in their length directions, and each group of battery cells is arranged along its width direction.

[0011] In some embodiments, one of the two pole columns of each group of battery cells that are far away from each other is connected to the battery cells on one of the adjacent two sides, and the other of the two pole columns of each group of battery cells that are far away from each other is connected to the battery cells on the other of the adjacent two sides.

[0012] In some embodiments, each group of battery cells includes: an aluminum bar, which is connected to the two pole columns of two adjacent battery cells and is electrically connected.

[0013] In some embodiments, each group of battery cells includes: a reinforcing sheet, which is connected to the bottoms of the two battery cells in each group.

[0014] In some embodiments, each group of battery cells includes: a heat-conducting member, which is arranged at the bottom of the battery cell.

[0015] The battery pack according to the second aspect of the present invention includes the battery module according to the first aspect of the present invention above.

[0016] By providing the battery module according to the first aspect, the battery pack according to the present invention improves the integration degree inside the battery pack, realizes the detachable repair and replacement of the battery cells separately, reduces the space volume of the battery module, has a simple structure, a high degree of generalization of components, a simple maintenance method, and reduces the production cost and maintenance cost.

[0017] The additional aspects and advantages of the present invention will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery module according to an embodiment of the present invention;

[0019] Figure 2 is Figure 1 a schematic diagram of the connecting member shown in

[0020] Figure 3 is Figure 2 a side view schematic diagram of the connecting member shown in

[0021] Figure 4 is Figure 1 a side view schematic diagram of the battery module shown in

[0022] Figure 5 is Figure 1 an assembly schematic diagram of the battery cell and the connecting member shown in

[0023] Figure 6 is Figure 5 a side view schematic diagram of the battery cell and the connecting member shown in

[0024] Figure 7 is a schematic diagram of a battery module of another embodiment;

[0025] Figure 8 is Figure 7 an assembly schematic diagram of the battery module and the aluminum bar shown in

[0026] Figure 9 is Figure 7 an assembly schematic diagram of the battery module and the reinforcing patch shown in

[0027] Figure 10 is Figure 7 a side view schematic diagram of the battery module shown in

[0028] Reference numerals:

[0029] 100, battery module; 1, battery cell; 2, connecting member; 21, connecting portion; 22, insulating portion; 23, fixing portion; 231, fixing hole; 3, insulating rod; 4, aluminum bar; 5, reinforcing patch; 6, connecting row. Detailed description of the specific embodiments

[0030] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0031] Reference will be made below to Figures 1-10 describe the battery module 100 according to an embodiment of the first aspect of the present invention.

[0032] As Figures 1-10 shown, the battery module 100 according to an embodiment of the first aspect of the present invention includes: a battery cell 1 and a connecting member 2.

[0033] Specifically, the battery cell 1 has a housing and a terminal post. The connecting member 2 is provided on the battery cell 1. The connecting member 2 has a connecting portion 21 and an insulating portion 22. The connecting portion 21 is connected to the terminal post, and the insulating portion 22 is connected to the housing. Moreover, the connecting member 2 is fixed on the insulating rod 3. Thus, the structure of the battery module 100 is simple and ingeniously designed.

[0034] For the battery module 100 according to the embodiment of the present invention, by providing the connecting member 2 on the battery cell 1, the functions of electrical connection and installation and fixation are integrated into one, realizing the detachable repair and replacement of the battery cell 1 alone, reducing the space volume of the battery module 100, with a simple structure, a high degree of generalization of components, a simple maintenance method, and reduced production costs and maintenance costs.

[0035] In some embodiments of the present invention, the connecting portion 21 of the connecting member 2 extends along a first direction, the insulating portion 22 extends along a second direction perpendicular to the first direction, and the connecting member 2 further forms a fixing portion 23. The fixing portion 23 extends along the first direction and is connected to the surface of the insulating portion 22 facing away from the connecting portion 21. Thus, the structural layout of the connecting member 2 is ingeniously designed, improving the safety performance of the battery pack and making the inside of the battery pack stable and reliable.

[0036] In some embodiments of the present invention, as Figure 2 shown, the fixing portion 23 is formed with a fixing hole 231, and the fixing hole 231 penetrates the fixing portion 23 in the thickness direction of the fixing portion 23. Thus, the battery cell 1 is fixedly connected by a fastener passing through the fixing hole 231, enhancing the connection stability, with a simple connection method, facilitating assembly and disassembly, and improving production efficiency.

[0037] In some embodiments of the present invention, there are multiple battery cells 1, each battery cell 1 includes two terminal posts, and each battery cell 1 is connected to at least one connecting member 2. As Figure 1 shown, each battery cell 1 is connected to two connecting members 2; as Figure 7 shown, each battery cell 1 is connected to one connecting member 2. Thus, the connection flexibility of the battery cell 1 is improved, and the generalization degree of components is enhanced.

[0038] In some embodiments of the present invention, every two of the multiple battery cells 1 form a group. The two battery cells 1 in each group are connected in their length directions, and each group of battery cells 1 is arranged along its width direction. Thus, the series and parallel arrangement methods not only increase the voltage but also increase the total capacity of the battery.

[0039] In some embodiments of the present utility model, one of the two mutually remote pole columns of each group of battery cells 1 is connected to the battery cells 1 on one side of the adjacent two sides, and the other of the two mutually remote pole columns of each group of battery cells 1 is connected to the battery cells 1 on the other side of the adjacent two sides. That is to say, an orderly Z-shaped connection mode is formed between the battery cells 1, which not only increases the total voltage of the battery pack, but also increases the total capacitance of the battery pack, while maintaining good thermal management and mechanical stability.

[0040] Preferably, as Figure 1 shown, it is connected by a connecting row 6.

[0041] In some other embodiments of the present utility model, since the aluminum bar 4 has the characteristics of light weight, good electrical conductivity, relatively low cost and good corrosion resistance, each group of battery cells 1 includes: an aluminum bar 4, and the aluminum bar 4 is connected to the two pole columns of two mutually adjacent battery cells 1 and is electrically connected. Thereby, the assembly process is simplified, maintenance and replacement are facilitated, and at the same time, it helps to improve the overall mechanical strength and thermal management efficiency of the battery module 100.

[0042] In some embodiments of the present utility model, as Figure 9 shown, each group of battery cells 1 includes: a reinforcing sheet 5, and the reinforcing sheet 5 is connected to the bottoms of two battery cells 1 in each group. Thereby, the battery module 100 is made more stable and reliable, the rigidity of the overall structure is increased, and the stability and safety of the battery cells 1 during long-term use are ensured.

[0043] In some embodiments of the present utility model, each group of battery cells 1 includes: a heat conducting member, and the heat conducting member is arranged at the bottom of the battery cell 1. Thereby, the temperature of the battery cell 1 is maintained within a suitable working range, heat accumulation is reduced, and performance attenuation or safety hazards caused by local overheating can also be prevented.

[0044] Optionally, the heat conducting member is a heat conducting grease member or a heat conducting silica gel pad.

[0045] Specifically, the insulating portion 22 of the connecting member 2 and the housing of the battery cell 1 are adhesively connected by a structural adhesive.

[0046] The battery pack according to the second aspect embodiment of the present utility model includes the battery module 100 according to the first aspect embodiment of the present utility model above.

[0047] The battery pack according to the embodiment of the present utility model, by arranging the battery module 100 of the first aspect embodiment above, improves the integration degree inside the battery pack, realizes the detachable repair and replacement of the battery cells 1 alone, reduces the space volume of the battery module 100, and has a simple structure, a high degree of generalization of parts, a simple maintenance method, and reduces the production cost and maintenance cost.

[0048] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0049] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0050] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0051] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 utility model. In this specification, the schematic representation 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 a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module, characterized in that: include: A battery cell, wherein the battery cell has a housing and a pole; A connector is provided on the battery cell, the connector has a connecting portion and an insulating portion, the connecting portion is connected to the pole, the insulating portion is connected to the shell, and the connector is fixed on an insulating rod.

2. The battery module according to claim 1, characterized in that: The connecting portion of the connector extends along a first direction, the insulating portion extends along a second direction perpendicular to the first direction, and the connector is further formed with a fixing portion extending along the first direction and connected to a side surface of the insulating portion away from the connecting portion.

3. The battery module according to claim 2, characterized in that: The fixing portion is formed with a fixing hole that penetrates the fixing portion in a thickness direction of the fixing portion.

4. The battery module according to any one of claims 1 to 3, characterized in that: The battery cells include a plurality of battery cells, each of which includes two poles, and each of which is connected to at least one of the connectors.

5. The battery module according to claim 4, characterized in that: Every two of the plurality of battery cells form a group, the two battery cells in each group are connected in the length direction thereof, and the battery cells in each group are arranged along the width direction thereof.

6. The battery module according to claim 5, characterized in that: One of the two poles away from each other in each group of battery cells is connected to the battery cell on one of the two adjacent sides, and the other of the two poles away from each other in each group of battery cells is connected to the battery cell on the other side of the two adjacent sides.

7. The battery module according to claim 6, characterized in that: Each group of battery cells includes an aluminum bar, which is connected to two poles of two battery cells adjacent to each other and is electrically connected.

8. The battery module according to claim 7, characterized in that: Each group of battery cells comprises a reinforcing sheet, and the reinforcing sheet connects the bottoms of the two battery cells in each group.

9. The battery module according to any one of claims 1 to 3, characterized in that: Each group of battery cells includes a heat conducting member, which is arranged at the bottom of the battery cells.

10. A battery pack, characterized in that: A battery module comprising any one of claims 1 to 9.

Images