CN213278201U

CN213278201U - Battery core cover plate, battery core and battery pack

Info

Publication number: CN213278201U
Application number: CN202021249847.0U
Authority: CN
Inventors: 孙新乐; 杨红新; 马忠龙; 王稳; 王珏; 陈森; 高顺航
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-05-25
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses an electric core cover plate, an electric core and a battery pack, wherein the electric core cover plate comprises a substrate component, a pole column, a fixed block and a connecting block, and the substrate component is used for being hermetically installed at one end of an electric core shell; the pole is positioned on one side surface of the substrate assembly and protrudes out of the substrate assembly; the fixing block is used for fixedly riveting the pole on the substrate component, and one end part of the fixing block is positioned on the other side surface of the substrate component; the connecting blocks and the poles are located on the same side face of the substrate assembly and are arranged at intervals, and the connecting blocks are fixed on the substrate assembly and protrude out of the substrate assembly. The utility model discloses a direct series connection of two electric cores can be realized to electric core apron, avoids using the connecting piece, has increased the space utilization of battery package, and the cost is reduced has guaranteed the structural strength requirement of establishing ties simultaneously.

Description

Battery core cover plate, battery core and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to an electricity core apron, electric core and battery package.

Background

With the reduction of world energy and the more serious environmental problems, new energy automobiles are more and more emphasized by countries in the world. The power battery is used as an important component of the new energy automobile, the requirements of the new energy automobile on the power battery are continuously improved, and the quality of the power battery is more and more important.

Common new energy automobile on the market at present, the width is more than 1 meter, but present common lithium cell width all is about 0.3 meter, for satisfying whole car to the demand of voltage, need set up a plurality of electric cores side by side in the package, and need have fixed knot structure and connecting piece to connect between each battery (as shown in fig. 6), lead to whole weight to rise like this and can make package space utilization reduce.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide an electricity core cover plate can realize the direct series connection of two electric cores, avoids using the connecting piece, has increased the space utilization of battery package, and the cost is reduced has guaranteed the structural strength requirement of establishing ties simultaneously.

According to the utility model discloses electric core cover plate of first aspect embodiment, include:

the substrate assembly is used for being hermetically installed at one end of the shell of the battery cell;

the polar column is positioned on one side surface of the substrate assembly and protrudes out of the substrate assembly;

the fixing block is used for fixedly riveting the pole on the substrate assembly, and one end part of the fixing block is positioned on the other side surface of the substrate assembly;

the connecting block with utmost point post is located on the same side of base plate subassembly and the interval is arranged, the connecting block is fixed on the base plate subassembly and protrusion in the base plate subassembly.

According to the electrical core cover plate of the embodiment of the first aspect of the present invention, when the electrical core cover plate is installed on an electrical core, the other side surface of the substrate assembly of the electrical core cover plate faces one end of the shell of the electrical core and one side surface of the substrate assembly faces outward, so that the terminal post can be exposed on the outer surface of the electrical core; then, the one end of fixed block and the anodal ear or the negative pole ear welded fastening of the utmost point group of electric core can make utmost point post switch on through the anodal or the negative pole electricity of the utmost point group of fixed block and electric core like this to with the sealed welded fastening of the one end of the casing of base plate subassembly and electric core. Here, the electrode post electrically connected to the positive electrode of the electrode group of the battery cell is a positive electrode post, and the electrode post electrically connected to the negative electrode of the electrode group of the battery cell is a negative electrode post. When a plurality of battery cores are assembled into a battery pack, the positive end of one part of the battery cores is provided with a battery core cover plate, the negative end of the other part of the battery cores is provided with a battery core cover plate, and when the battery cores are connected in series, the negative end of one part of the battery cores and the positive end of the other part of the battery cores are correspondingly welded and fixed with the positive end of the other part of the battery cores and the positive end of the other part of the battery cores through the negative pole column and the connecting block on. Therefore, the direct series connection of the two battery cores can be realized by welding the positive pole on one battery core cover plate and the negative pole on the other battery core cover plate, so that a connecting piece can be avoided, the space utilization rate of the battery pack is increased, and the cost is reduced; experiments prove that the space utilization rate of the battery pack can be increased by 2-5%. Through with connecting block welded fastening on the apron of a battery core and the connecting block welded fastening on another battery core apron, can ensure the series structure intensity requirement between two electric cores.

According to an embodiment of the first aspect of the present invention, the substrate assembly includes a substrate, a first insulating member and a second insulating member, the first insulating member is disposed between the terminal and the substrate, the second insulating member is disposed between the fixed block and the substrate, the first insulating member and the second insulating member make the substrate and the fixed block and the terminal completely isolated and insulated.

According to the utility model discloses the further embodiment of first aspect, first insulating part is first plastic part, the second insulating part does the second plastic part.

According to a further embodiment of the first aspect of the present invention, the substrate is an aluminum plate.

According to a still further embodiment of the first aspect of the present invention, the connecting block is an aluminum block.

According to a still further embodiment of the first aspect of the present invention, the connecting block is fixed to the base plate.

According to the utility model discloses the first aspect is further embodiment again, be equipped with the through-hole on the base plate, the connecting block is installed with the adaptation in the through-hole.

The utility model discloses the second aspect still provides an electricity core.

According to the electric core provided by the embodiment of the second aspect of the present invention, the electric core is a first electric core, and the first electric core includes a first shell, a first pole group, a first positive pole cover plate and a first negative pole cover plate; two ends of the first shell are respectively provided with a first opening, and the first pole group is positioned in the first shell; the first positive electrode cover plate is the electrical core cover plate according to any one embodiment of the first aspect of the present invention, the first positive electrode cover plate is disposed at the first opening of one end of the first casing, and the substrate assembly of the first positive electrode cover plate is welded and fixed to one end of the first casing in a sealing manner; the pole column and the connecting block on the first positive cover plate are exposed to the outer surface of the first battery cell; one end of the fixing block of the first positive electrode cover plate is welded and fixed with the positive electrode of the first electrode group of the first battery cell, so that the electrode posts are electrically conducted; the first negative cover plate is arranged at the first opening at the other end of the first shell and is welded and fixed with the other end of the first shell in a sealing way;

or the battery cell is a second battery cell, and the second battery cell comprises a second shell, a second pole group, a second positive pole cover plate and a second negative pole cover plate; two ends of the second shell are respectively provided with a second opening, and the second pole group is positioned in the second shell; the second negative electrode cover plate is the electrical core cover plate according to any one embodiment of the first aspect of the present invention, the second negative electrode cover plate is disposed at the second opening of one end of the second casing, and the substrate assembly of the second negative electrode cover plate is welded and fixed to one end of the second casing in a sealing manner; the pole column and the connecting block on the second negative electrode cover plate are exposed to the outer surface of the second battery cell; one end of the fixing block of the second negative electrode cover plate is welded and fixed with the negative electrode of the second electrode group of the second battery cell, so that the electrode posts are electrically conducted; the second positive cover plate is arranged at the second opening at the other end of the second shell and is fixedly welded with the other end of the second shell in a sealing mode.

The utility model discloses the third aspect has still provided a battery package.

According to the utility model discloses battery pack of third aspect embodiment, including the second aspect embodiment first electric core with the second electric core, first electric core first positive pole apron the utmost point post reaches the connecting block with the second negative pole apron of second electric core the utmost point post reaches the connecting block respectively corresponds direct welded fastening and makes first electric core with the second electric core is established ties.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a cell cover plate according to an embodiment of the first aspect of the present invention in one direction.

Fig. 2 is a schematic cross-sectional view of another position of the cell cover plate according to the embodiment of the first aspect of the present invention.

Fig. 3 is an assembly diagram of direct series connection between two battery cells of a battery cell cover plate according to an embodiment of the present invention.

Fig. 4 is an enlarged schematic view of a portion a of fig. 3.

Fig. 5 is a schematic structural diagram of a battery pack according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a battery pack according to the prior art.

Reference numerals:

battery core cover plate 1000

Substrate 11 of substrate assembly 1 through hole 111 first insulator 12 second insulator 13

Pole 2

Fixed block 3

Connecting block 4

Battery pack 2000

First cell 5 first negative electrode cover plate 51

Second cell 6 second positive cover plate 61

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

A cell cover plate 1000 according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1 to 4, a cell cover plate 1000 according to an embodiment of the present invention includes a substrate assembly 1, a terminal post 2, a fixing block 3, and a connecting block 4, where the substrate assembly 1 is configured to be hermetically mounted at one end of a housing of a cell; the pole 2 is positioned on one side surface of the substrate component 1 and protrudes out of the substrate component 1; the fixing block 3 rivets the pole 2 on the substrate component 1, and one end part of the fixing block 3 is positioned on the other side surface of the substrate component 1; the connecting blocks 4 and the poles 2 are located on the same side of the substrate assembly 1 and are arranged at intervals, and the connecting blocks 4 are fixed on the substrate assembly 1 and protrude out of the substrate assembly 1.

According to the electrical core cover plate 1000 of the embodiment of the first aspect of the present invention, when the electrical core is mounted on an electrical core, the other side surface of the substrate plate assembly 1 of the electrical core cover plate 1000 faces one end of the shell of the electrical core and one side surface of the substrate plate assembly 1 faces outward, so that the terminal post 2 can be exposed on the outer surface of the electrical core; then, the one end of fixed block 3 and the anodal or negative pole welded fastening of the utmost point group of electric core can make utmost point post 2 switch on through the anodal or the negative pole electricity of the utmost point group of fixed block 3 with electric core like this to seal welded fastening with the one end of the casing of base plate subassembly 1 and electric core, thereby form electric core. Here, the post 2 electrically connected to the positive electrode of the electrode group of the cell is a positive post 2, and the post 2 electrically connected to the negative electrode of the electrode group of the cell is a negative post 2. When a plurality of battery cells are assembled into the battery pack 2000, the positive terminal of one part of the battery cells has the battery cell cover plate 1000, the negative terminal of the other part of the battery cells has the battery cell cover plate 1000, and when the battery cells are connected in series, the negative terminal 2 and the connecting block 4 on the battery cell cover plate 1000 of one battery cell can be correspondingly welded and fixed with the positive terminal 2 and the connecting block 4 on the battery cell cover plate 1000 of another battery cell. Therefore, the direct series connection of two battery cores can be realized by welding the positive pole post 2 on one battery core cover plate 1000 with the negative pole post 2 on the other battery core cover plate 1000, so that a connecting piece can be avoided, the space utilization rate of the battery pack 2000 is increased, and the cost is reduced; experiments prove that the space utilization rate of the battery pack 2000 can be increased by 2-5%; the strength requirement of the series structure between two battery cells can be ensured by welding and fixing the connecting block 4 on one battery cell cover plate 1000 and the connecting block 4 on the other battery cell cover plate 1000.

According to an embodiment of the first aspect of the present invention, the substrate assembly 1 includes a substrate 11, a first insulating member 12 and a second insulating member 13, the first insulating member 12 is disposed between the terminal 2 and the substrate 11, the second insulating member 13 is disposed between the fixing block 3 and the substrate 11, and the first insulating member 12 and the second insulating member 13 completely isolate and insulate the substrate 11 from the fixing block 3 and the terminal 2. It can be understood that the base plate 11 is used as the support of the pole 2, the fixing block 3 and the connecting block 4, the first insulating part 12 isolates the pole 2 from the base plate 11, and the second insulating part 13 isolates the fixing block 3 from the base plate 11, so that the base plate 11 is insulating, the operation of workers is facilitated, and the safety is improved.

According to a further embodiment of the first aspect of the present invention, the first insulating member 12 is a first plastic member, and the second insulating member 13 is a second plastic member. It can be understood that the first plastic part and the second plastic part are simple to form, low in cost and good in insulation effect.

According to a further embodiment of the first aspect of the present invention, the base plate 11 is an aluminum plate. It can be understood that the aluminum plate has light weight, high strength and simple forming, can reduce the weight of the battery pack 2000, and is convenient to install. Preferably, the aluminum plate is a bare aluminum plate.

According to a still further embodiment of the first aspect of the present invention, the connection block 4 is an aluminum block. Thus, on the premise of ensuring the strength of the series structure of the two battery cells, the weight of the battery pack 2000 can be further reduced.

According to a still further embodiment of the first aspect of the present invention, the connection block 4 is welded to the base plate 11. Therefore, the connecting plate and the substrate 11 are fixed reliably, and the requirement on the strength of the series structure between the two electric cores is met.

According to the utility model discloses the first aspect is further embodiment again, is equipped with through-hole 111 on the base plate 11, and connecting block 4 is installed in through-hole 111 with the adaptation. It can be understood that, the connection block 4 is fittingly installed in the through hole 111 on the substrate 11, which can further enhance the fixing strength of the connection block 4 and the substrate 11, prevent the connection block 4 from shifting in the length direction of the substrate 11, and ensure the strength requirement of the series structure between two electric cores.

As shown in fig. 3 and fig. 4, the battery cell according to the embodiment of the second aspect of the present invention may be the first battery cell 5, and may also be the second battery cell 6. The first battery cell comprises a first shell, a first pole group, a first positive pole cover plate and a first negative pole cover plate 51; two ends of the first shell are respectively provided with a first opening, and the first pole group is positioned in the first shell; the first positive electrode cover plate is the cell cover plate 1000 according to any one embodiment of the first aspect of the present invention, the first positive electrode cover plate is disposed at the first opening of one end of the first casing, and the substrate assembly 1 of the first positive electrode cover plate is welded and fixed to one end of the first casing in a sealing manner; the pole 2 and the connecting block 4 on the first positive cover plate are exposed on the outer surface of the first battery cell 5; one end of the fixing block 3 of the first positive electrode cover plate is welded and fixed with the positive electrode of the first electrode group of the first battery cell 5, so that the electrode post 2 is electrically conducted; the first negative electrode cover plate 51 may be an existing cover plate, and the first negative electrode cover plate 51 is disposed at the first opening at the other end of the first casing and is welded and fixed to the other end of the first casing in a sealing manner.

The second battery cell 6 comprises a second shell, a second pole group, a second positive pole cover plate 61 and a second negative pole cover plate; two ends of the second shell are respectively provided with a second opening, and the second pole group is positioned in the second shell; the second negative electrode cover plate is the battery core cover plate 1000 according to any one embodiment of the first aspect of the present invention, the second negative electrode cover plate is disposed at a second opening at one end of the second casing, and the substrate assembly 1 of the second negative electrode cover plate is welded and fixed to one end of the second casing in a sealing manner; the pole 2 and the connecting block 4 on the second negative electrode cover plate are exposed on the outer surface of the second battery cell 6; one end of the fixing block 3 of the second negative electrode cover plate is welded and fixed with the negative electrode of the second electrode group of the second battery cell 6, so that the electrode post 2 is electrically conducted; the second positive cover plate 61 may be an existing cover plate, and the second positive cover plate 61 is disposed at the second opening of the other end of the second housing and is welded and fixed to the other end of the second housing.

Therefore, the positive pole column 2 and the connecting block 4 on the first battery cell 5 and the negative pole column 2 and the connecting block 4 on the second battery cell 6 can be directly and correspondingly welded and fixed, so that the first battery cell 5 and the second battery cell 6 can be directly connected in series, connecting pieces can be avoided, and the space utilization rate of the battery pack 2000 is increased; the connecting block 4 of the first positive cover plate is welded and fixed with the connecting block 4 of the second negative cover plate, so that the requirement on the strength of a series structure between the first battery cell 5 and the second battery cell 6 can be met.

The third aspect of the present invention further provides a battery pack 2000.

As shown in fig. 3 to 5, according to the battery pack 2000 of the embodiment of the third aspect of the present invention, including the first battery cell 5 and the second battery cell 6, the terminal 2 and the connection block 4 of the first positive electrode cover plate of the first battery cell 5 and the terminal 2 and the connection block 4 of the second negative electrode cover plate of the second battery cell 6 are respectively and directly welded and fixed correspondingly so that the first battery cell 5 and the second battery cell 6 are connected in series. Thus, the use of a connector can be avoided, while increasing the space utilization of the battery pack 2000; the connecting blocks 4 on the first positive electrode cover plate and the connecting blocks 4 on the second negative electrode cover plate are welded and fixed in a one-to-one correspondence mode, and the requirement on the strength of the series structure between every two first battery cells 5 and every two second battery cells 6 can be met.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cell cover plate (1000), comprising:

the circuit board assembly comprises a substrate assembly (1), wherein the substrate assembly (1) is used for being hermetically installed at one end of a shell of a battery cell;

the terminal post (2) is positioned on one side surface of the substrate assembly (1) and protrudes out of the substrate assembly (1);

the fixing block (3) is used for fixedly riveting the pole (2) on the substrate component (1), and one end part of the fixing block (3) is positioned on the other side surface of the substrate component (1);

connecting block (4), connecting block (4) with utmost point post (2) are located arrange on the same side of base plate subassembly (1) and interval ground, connecting block (4) are fixed on base plate subassembly (1) and protrusion in base plate subassembly (1).

2. The cell cover plate (1000) according to claim 1, wherein the substrate assembly (1) comprises a substrate (11), a first insulator (12) and a second insulator (13), the first insulator (12) being arranged between the terminal post (2) and the substrate (11), the second insulator (13) being arranged between the fixing block (3) and the substrate (11), the first insulator (12) and the second insulator (13) completely isolating and insulating the substrate (11) from the fixing block (3) and the terminal post (2).

3. The cell cover plate (1000) according to claim 2, wherein the first insulating member (12) is a first plastic member and the second insulating member (13) is a second plastic member.

4. The cell cover plate (1000) according to claim 2, characterized in that the base plate (11) is an aluminum plate.

5. The cell cover plate (1000) according to claim 4, characterized in that the connection block (4) is an aluminum block.

6. The cell cover plate (1000) according to claim 5, characterized in that the connection block (4) is fixed to the base plate (11).

7. The cell cover plate (1000) according to claim 6, wherein the base plate (11) is provided with a through hole (111), and the connection block (4) is fittingly mounted in the through hole (111).

8. A cell, characterized in that the cell is a first cell (5), the first cell (5) comprising a first casing, a first pole group, a first positive cover plate and a first negative cover plate (51); two ends of the first shell are respectively provided with a first opening, and the first pole group is positioned in the first shell; the first positive cover plate is the battery cell cover plate (1000) according to any one of claims 1 to 7, the first positive cover plate is arranged at the first opening at one end of the first shell, and the substrate assembly (1) of the first positive cover plate is welded and fixed with one end of the first shell in a sealing manner; the pole (2) and the connecting block (4) on the first positive cover plate are exposed to the outer surface of the first battery cell (5); one end of the fixing block (3) of the first positive cover plate is welded and fixed with the positive electrode of the first electrode group of the first battery cell (5), so that the electrode post (2) is electrically conducted; the first negative cover plate (51) is arranged at the first opening at the other end of the first shell and is welded and fixed with the other end of the first shell in a sealing way;

or the battery cell is a second battery cell (6), and the second battery cell (6) comprises a second shell, a second pole group, a second positive pole cover plate (61) and a second negative pole cover plate; two ends of the second shell are respectively provided with a second opening, and the second pole group is positioned in the second shell; the second negative cover plate is the battery core cover plate (1000) according to any one of claims 1 to 7, the second negative cover plate is arranged at the second opening of one end of the second shell, and the substrate assembly (1) of the second negative cover plate is welded and fixed to one end of the second shell in a sealing manner; the pole (2) and the connecting block (4) on the second negative cover plate are exposed to the outer surface of the second battery cell (6); one end of the fixing block (3) of the second negative electrode cover plate is welded and fixed with the negative electrode of the second electrode group of the second battery cell (6), so that the electrode post (2) is electrically conducted; the second positive cover plate (61) is arranged at the second opening at the other end of the second shell and is welded and fixed with the other end of the second shell in a sealing mode.

9. A battery pack (2000), comprising the first electrical core (5) and the second electrical core (6) as set forth in claim 8, wherein the terminal post (2) and the connection block (4) of the first positive cover plate of the first electrical core (5) and the terminal post (2) and the connection block (4) of the second negative cover plate of the second electrical core (6) are respectively directly welded and fixed in correspondence so that the first electrical core (5) and the second electrical core (6) are connected in series.