Battery cell assembly, battery pack and electric equipment

Abstract

The utility model discloses a battery cell assembly, a battery pack and electric equipment, the battery cell assembly comprises a first pole piece, a second pole piece and a diaphragm, the first pole piece is provided with a first tab at a first end; the second pole piece is provided with a second tab at the second end; the diaphragm is arranged between the first pole pieces and the second pole pieces, the number of the first pole pieces and the number of the second pole pieces are both multiple, the multiple first pole pieces and the multiple second pole pieces are laminated in a staggered mode, and the second end of at least one of the multiple first pole pieces is provided with a third pole lug. According to the battery cell assembly disclosed by the embodiment of the utility model, the third pole lug is arranged on the first pole piece, so that the arrangement of a signal sampling line on the battery cell assembly can be simplified, the assembly difficulty of the battery cell assembly is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic batteries, in particular to a battery core assembly, a battery pack and electrical equipment. Background Art

[0002] In the battery pack, the battery management system needs to sample and monitor the voltage and other information of the battery cell through the circuit sampling board. The commonly used sampling circuit is to connect the flexible circuit sampling board (FPC) and the corresponding bus through a connecting piece. Specifically, the sampling circuit board and the connecting piece are welded together, and then the connecting piece and the bus are welded together. The bus is electrically connected to the battery cell, and the voltage of the battery cell can be sampled.

[0003] However, the sampling circuit layout in the related art is relatively complicated, thereby increasing the difficulty and cost of assembling the battery pack. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cell assembly, which can simplify the arrangement of signal sampling lines on the battery cell assembly, reduce the difficulty of assembling the battery cell assembly, and thus reduce production costs.

[0005] According to an embodiment of the utility model, the battery cell assembly includes: a first pole piece, which has a first pole ear at the first end; a second pole piece, which has a second pole ear at the second end; and a diaphragm, which is arranged between the first pole piece and the second pole piece, wherein a plurality of the first pole pieces and a plurality of the second pole pieces are arranged, the plurality of the first pole pieces and the plurality of the second pole pieces are staggered and stacked, and at least one of the plurality of the first pole pieces has a third pole ear at the second end.

[0006] According to the battery cell assembly of the embodiment of the utility model, by providing the third pole ear on the first pole piece, the arrangement of the signal sampling line on the battery cell assembly can be simplified, the difficulty of assembling the battery cell assembly can be reduced, and thus the production cost can be reduced.

[0007] In addition, the battery cell assembly according to the embodiment of the utility model may also have the following additional technical features:

[0008] In some embodiments of the present invention, the third pole tab is staggered with the second pole tab in the width direction of the first pole piece or the second pole piece.

[0009] In some embodiments of the present invention, in the width direction of the first pole piece or the second pole piece, the width of the second pole lug is greater than the width of the third pole lug.

[0010] In some embodiments of the present invention, the third pole lug includes a first section and a second section, the second section is connected between the first section and the first pole piece, wherein the first section is parallel to the first pole piece, and the angle between the second section and the first pole piece is an acute angle or a right angle.

[0011] In some embodiments of the present invention, the battery cell assembly further includes: a first adapter plate and a second adapter plate, wherein the first adapter plate is electrically connected to the plurality of the first pole tabs, and the second adapter plate is electrically connected to the plurality of the second pole tabs.

[0012] In some embodiments of the present invention, when a plurality of the first pole pieces having the third pole tabs are provided, the battery cell assembly further includes a third adapter plate, and the third adapter plate is electrically connected to the plurality of the third pole tabs.

[0013] The utility model also provides a battery pack having the battery cell assembly of the above embodiment.

[0014] According to the battery pack of the embodiment of the utility model, by providing the battery cell assembly of the above embodiment, the arrangement of the signal sampling lines on the battery pack can be simplified, the difficulty of assembling the battery pack can be reduced, and thus the production cost can be reduced.

[0015] In some embodiments of the present invention, a plurality of the battery cell assemblies are provided, and the plurality of the battery cell assemblies are stacked along the direction of the first pole piece and the second pole piece stack.

[0016] In some embodiments of the present invention, the battery pack further includes a collection unit, which is located at the second end of the battery cell assembly and is used to be electrically connected to the second pole tab and the third pole tab.

[0017] The utility model also provides an electrical device having the battery pack of the above embodiment.

[0018] According to the electric device of the embodiment of the utility model, by being provided with the battery pack of the above embodiment, the cost of configuring the battery pack for the electric device can be reduced, thereby reducing the cost of the electric device.

[0019] Alternatively, the electric device may be a vehicle.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of a battery core assembly according to an embodiment of the utility model.

[0023] Figure 2 It is an exploded view of two first pole pieces and one second pole piece of a battery cell assembly according to an embodiment of the utility model.

[0024] Figure 3 It is a structural schematic diagram of a battery core assembly according to an embodiment of the utility model.

[0025] Figure 4 It is a structural schematic diagram of a battery cell assembly and a collection unit according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] Battery cell assembly 100,

[0028] first pole piece 1, first pole ear 11, third pole ear 12, first section 121, second section 122,

[0029] The second pole piece 2, the second pole ear 21,

[0030] The first adapter 4, the second adapter 5,

[0031] Collection unit 200. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] Reference below Figure 1-Figure 4 A battery cell assembly 100 according to an embodiment of the present invention is described.

[0036] like Figure 1-Figure 4 As shown, the battery cell assembly 100 according to the embodiment of the utility model includes a first pole piece 1, a second pole piece 2 and a diaphragm, the first pole piece 1 has a first pole ear 11 at the first end, the second pole piece 2 has a second pole ear 21 at the second end, the diaphragm is arranged between the first pole piece 1 and the second pole piece 2, and the first pole piece 1 and the second pole piece 2 are each provided with a plurality of first pole pieces 1 and a plurality of second pole pieces 2 are staggered and stacked.

[0037] Reference Figure 1 As shown, the first end can be the left end, and the second end can be the right end. After the multiple first pole pieces 1 and the multiple second pole pieces 2 are staggered and stacked, the multiple first pole ears 11 are all located at the left end, and the multiple second pole ears 21 are all located at the right end. Therefore, an adapter can be used, and the adapter can be a bus, for example, the bus is electrically connected to the multiple first pole ears 11 respectively, and the bus is electrically connected to the multiple second pole ears 21, so that the multiple first pole pieces 1 and the multiple second pole pieces 2 are connected in series or in parallel.

[0038] Furthermore, at least one of the multiple first pole pieces 1 has a third pole ear 12 at the second end. That is to say, in order to facilitate signal acquisition of the battery cell assembly 100, the signal may be a voltage signal. The third pole ear 12 may be provided at the second end of a first pole piece 1, or the third pole ear 12 may be provided at the second ends of two or more first pole pieces 1. Thus, by providing the third pole ear 12, only the acquisition unit 200 is provided at the second end of the battery cell assembly 100 to complete the signal acquisition of the battery cell assembly 100. The structure is simple and the operation is convenient, and the arrangement of the signal sampling lines of the battery cell assembly 100 can be reduced.

[0039] Optionally, the first electrode sheet 1 may be a positive electrode sheet, and the second electrode sheet 2 may be a negative electrode sheet. It can be understood that the first electrode sheet 1 may also be a negative electrode sheet, and the second electrode sheet 2 may be a positive electrode sheet.

[0040] According to the battery cell assembly 100 of the embodiment of the utility model, by providing the third pole ear 12 on the first pole piece 1, the arrangement of the signal sampling line on the battery cell assembly 100 can be simplified, the assembly difficulty of the battery cell assembly 100 can be reduced, and thus the production cost can be reduced.

[0041] In some embodiments of the present invention, Figure 1 As shown, in the width direction of the first pole piece 1 or the second pole piece 2 , the third pole tab 12 and the second pole tab 21 are staggered.

[0042] like Figure 1 In the example shown, the width direction of the first pole piece 1 or the second pole piece 2 can refer to Figure 1 In the up-down direction shown in the figure, the third pole ear 12 and the second pole ear 21 are spaced apart in the up-down direction, which can prevent the second pole ear 21 and the third pole ear 12 from contacting each other during assembly, thereby causing a short circuit of the battery cell assembly 100. Therefore, by spacing the third pole ear 12 and the second pole ear 21 apart in the up-down direction, a short circuit of the battery cell assembly 100 can be better avoided, and at the same time, signal collection of the battery cell assembly 100 can also be better.

[0043] In some embodiments of the present invention, Figure 1 As shown, in the width direction of the first pole piece 1 or the second pole piece 2, the width of the second pole ear 21 is greater than the width of the third pole ear 12. That is to say, the width of the second pole ear 21 is larger, which can increase the flow area of ​​the second pole piece 2 to meet the output current requirement of the battery cell assembly 100, while the third pole ear 12 only needs to meet the signal acquisition requirement. Therefore, within the limited width size range of the first pole ear 11 or the second pole ear 21, the width size of the third pole ear 12 can be reduced to a certain extent, so that the width of the second pole ear 21 is greater than the width of the third pole ear 12.

[0044] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the third pole lug 12 includes a first section 121 and a second section 122, and the second section 122 is connected between the first section 121 and the first pole piece 1, wherein the first section 121 is parallel to the first pole piece 1, and the angle between the second section 122 and the first pole piece 1 is an acute angle or a right angle. For example, one end of the third pole lug 12 is connected to the first pole piece 1, and the other end can be first bent in a direction perpendicular to the first pole piece 1, and then bent again in a direction parallel to the first pole piece 1, so that the third pole lug 12 and the second pole lug 21 can be better offset. Optionally, in the width direction of the first pole lug 11 or the second pole lug 21, the second pole lug 21 and the third pole lug 12 are staggered, so that the second pole lug 21 and the third pole lug 12 can be further guaranteed not to contact.

[0045] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the battery cell assembly 100 further includes a first adapter 4 and a second adapter 5, the first adapter 4 is electrically connected to the plurality of first pole tabs 11, and the second adapter 5 is electrically connected to the plurality of second pole tabs 21. In one example, the first adapter 4 is electrically connected to the plurality of first pole tabs 11 to construct the positive electrode of the battery cell assembly 100, and the second adapter 5 is electrically connected to the plurality of second pole tabs 21 to construct the negative electrode of the battery cell assembly 100; in another example, the first adapter 4 is electrically connected to the plurality of first pole tabs 11 to construct the negative electrode of the battery cell assembly 100, and the second adapter 5 is electrically connected to the plurality of second pole tabs 21 to construct the positive electrode of the battery cell assembly 100.

[0046] In some embodiments of the present invention, when there are multiple first pole pieces 1 with third pole tabs 12, the battery cell assembly 100 further includes a third adapter, and the third adapter is electrically connected to the multiple third pole tabs 12. That is, when there is only one first pole piece 1 provided with the third pole tab 12, the third pole tab 12 can be configured to be directly electrically connected to the sampling unit, that is, the length of the third pole tab 12 can be configured to be longer, so that there is no need to set up an adapter structure between the third pole tab 12 and the sampling unit, which can reduce the structural complexity of the battery cell assembly 100; when there are two or more first pole pieces 1 provided with the third pole tabs 12, in order to facilitate the electrical connection of the multiple third pole tabs 12 with the sampling unit, a third adapter can be provided, thereby reducing the difficulty of electrical connection of the multiple third pole tabs 12 with the sampling unit.

[0047] The present invention also provides a battery pack having the battery cell assembly 100 of the above embodiment.

[0048] According to the battery pack of the embodiment of the utility model, by providing the battery cell assembly 100 of the above embodiment, the arrangement of the signal sampling lines on the battery pack can be simplified, the difficulty of assembling the battery pack can be reduced, and thus the production cost can be reduced.

[0049] In some embodiments of the present invention, Figure 4 As shown, a plurality of battery cell assemblies 100 are provided, and the plurality of battery cell assemblies 100 are stacked along the direction of the first pole piece 1 and the second pole piece 2. The plurality of battery cell assemblies 100 can be provided with a third pole ear 12 for signal collection, so that when the battery pack has a plurality of battery cell assemblies 100, the arrangement of the signal sampling line on the battery pack can be simplified, the difficulty of assembling the battery pack can be reduced, and thus the production cost can be reduced.

[0050] In some embodiments of the present invention, Figure 4As shown, the battery pack also includes a collection unit 200, which is located at the second end of the battery cell assembly 100. The collection unit 200 is used to be electrically connected to the second pole ear 21 and the third pole ear 12. Therefore, the battery pack of the utility model only needs to set a collection unit 200 at the second end of the battery cell assembly 100, that is, the signal collection of the battery pack can be completed, and the arrangement of the signal collection line between the collection unit 200 and the battery cell assembly 100 is also relatively simple; in addition, the collection unit 200 is arranged at the second end of the battery cell assembly 100, so that the distance between the collection unit 200 and the third pole ear 12 is shorter, and the third pole ear 12 can even be directly electrically connected to the collection unit 200, and the adapter structure between the third pole ear 12 and the collection unit 200 can be omitted, thereby further reducing the production cost of the battery pack.

[0051] The utility model also provides an electrical device having the battery pack of the above embodiment.

[0052] According to the electric device of the embodiment of the utility model, by being provided with the battery pack of the above embodiment, the cost of configuring the battery pack for the electric device can be reduced, thereby reducing the cost of the electric device.

[0053] Alternatively, the electric device may be a vehicle.

[0054] Other structures and operations of the battery cell assembly 100, the battery pack and the electrical equipment according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0055] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the 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 any one or more embodiments or examples in a suitable manner.

[0056] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cell assembly, characterized in that: include: A first pole piece, wherein the first pole piece has a first pole lug at a first end; A second pole piece, wherein the second pole piece has a second pole lug at a second end; A diaphragm is arranged between the first pole piece and the second pole piece, wherein the first pole piece and the second pole piece are each provided with a plurality, the plurality of first pole pieces and the plurality of second pole pieces are staggered and stacked, and at least one of the plurality of first pole pieces has a third pole ear at its second end.

2. The battery cell assembly according to claim 1, characterized in that: In the width direction of the first pole piece or the second pole piece, the third pole tab is staggered with the second pole tab.

3. The battery core assembly according to claim 1 or 2, characterized in that: In the width direction of the first pole piece or the second pole piece, the width of the second pole tab is greater than the width of the third pole tab.

4. The battery core assembly according to claim 1 or 2, characterized in that: The third pole lug includes a first section and a second section, wherein the second section is connected between the first section and the first pole piece, wherein the first section is parallel to the first pole piece, and the angle between the second section and the first pole piece is an acute angle or a right angle.

5. The battery core assembly according to claim 1 or 2, characterized in that: Also includes: A first adapter plate and a second adapter plate, wherein the first adapter plate is electrically connected to the plurality of first tabs, and the second adapter plate is electrically connected to the plurality of second tabs.

6. The battery core assembly according to claim 1, characterized in that: When the first pole piece having the third pole tab is provided in plurality, the battery cell assembly further includes a third adapter plate, and the third adapter plate is electrically connected to the plurality of the third pole tabs.

7. A battery pack, characterized in that: A battery core assembly comprising any one of claims 1 to 6.

8. The battery pack according to claim 7, characterized in that: A plurality of the battery cell assemblies are provided, and the plurality of the battery cell assemblies are stacked along the direction of the first pole piece and the second pole piece stack.

9. The battery pack according to claim 7, characterized in that: It also includes a collection unit, which is located at the second end of the battery cell assembly and is used to be electrically connected to the second pole ear and the third pole ear.

10. An electrical device, characterized in that: A battery pack comprising any one of claims 7-9.

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