CN214848742U

CN214848742U - Battery cell and battery

Info

Publication number: CN214848742U
Application number: CN202121198489.XU
Authority: CN
Inventors: 刘德昌; 刘道淦; 王海龙; 尹海旭; 王守兵
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-11-23
Anticipated expiration: 2031-05-31

Abstract

The utility model provides an electricity core and battery, electricity core includes: a housing defining a mounting space therein and including first and second non-coplanar end walls; the pole group is arranged in the installation space, the pole group is connected with a positive terminal and a negative terminal, the positive terminal is arranged on one of the first end wall and the second end wall, and the negative terminal is arranged on the other one of the first end wall and the second end wall. From this, through setting up positive terminal and negative terminal respectively on first end wall and second end wall, can avoid the positive negative pole of electric core to connect and cause the short circuit to can avoid the condition emergence of electric core short circuit damage, can improve the safety in utilization of electric core.

Description

Battery cell and battery

Technical Field

The utility model relates to a battery technology field, in particular to electricity core and have its battery.

Background

In the prior art, along with the popularization of electric vehicles, lithium ion batteries are widely used as batteries of electric vehicles, and a battery core in the conventional lithium ion battery often generates a phenomenon of short circuit caused by connection of a positive electrode and a negative electrode, so that the lithium ion battery is damaged, and the use safety of the battery core is reduced.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an electric core, this electric core can avoid the positive negative pole of electric core to connect and cause the short circuit through setting up positive terminal and negative terminal respectively on first end wall and second end wall to can avoid the condition emergence that electric core short circuit damaged, can improve the safety in utilization of electric core.

Another object of the present invention is to provide a battery.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

according to the utility model discloses an electricity core includes: a housing defining a mounting space therein and including first and second non-coplanar end walls; the pole group is arranged in the installation space, the pole group is connected with a positive terminal and a negative terminal, the positive terminal is arranged on one of the first end wall and the second end wall, and the negative terminal is arranged on the other one of the first end wall and the second end wall.

According to the utility model discloses an electricity core, through setting up positive terminal and negative terminal respectively on first end wall and second end wall, can avoid the positive negative pole of electricity core to connect and cause the short circuit to can avoid the condition emergence of electric core short circuit damage, can improve the safety in utilization of electric core.

In some examples of the invention, the housing further comprises: a connection wall, the first and second end walls being opposite and spaced apart, the connection wall being connected between the first and second end walls to define the installation space.

In some examples of the invention, the connecting wall comprises: a top wall and a bottom wall opposed and spaced apart, and a side wall connecting the top wall, the bottom wall, the first end wall and the second end wall, the top wall having a cross-sectional area less than the cross-sectional area of the bottom wall.

In some examples of the invention, the first end wall, the second end wall and the connecting wall cooperate to connect a housing forming a ladder structure.

In some examples of the invention, the pole group comprises: the negative electrode comprises a plurality of sub-electrode groups, wherein the plurality of sub-electrode groups are sequentially stacked to form the electrode group, each sub-electrode group comprises a positive electrode piece, a negative electrode piece and a diaphragm, and the sub-electrode groups are sequentially stacked according to the sequence of the diaphragms, the negative electrode pieces, the diaphragms, the positive electrode pieces, the diaphragms and the negative electrode pieces.

In some examples of the present invention, the electrode group is provided with a plurality of opposite ends, and the area of the negative electrode plate is gradually increased and increased in a plurality of directions from the opposite end to the opposite end of the electrode group.

In some examples of the present invention, the width dimension and/or the length dimension of the plurality of negative electrode plates are sequentially increased from the one end of the electrode group to the other end.

In some examples of the invention, the area of the first end wall is different from the area of the second end wall, and/or the shape of the first end wall is different from the shape of the second end wall.

In some examples of the invention, the shape of the pole group matches the shape of the housing.

According to the utility model discloses a battery includes a plurality of electric cores, and is a plurality of the electric core connects gradually and forms the battery that the longitudinal section is loop configuration, or a plurality of the electric core connects gradually and forms the battery that the longitudinal section is parallelogram structure, electric core is foretell electric core.

According to the utility model discloses a battery, through setting up the positive terminal and the negative terminal of electric core respectively on first end wall and second end wall, can avoid the positive negative pole of electric core to connect and cause the short circuit to can avoid the condition emergence that electric core short circuit damaged, can improve the safety in utilization of electric core, can promote the safety in utilization of battery.

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 accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic diagram of a cell according to an embodiment of the present invention;

fig. 2 is a schematic view of a pole group according to an embodiment of the present invention;

fig. 3 is a schematic longitudinal sectional view of a pole group according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a battery according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a battery according to another embodiment of the present invention.

Description of reference numerals:

a battery 100;

an electric core 10;

a housing 20; a first end wall 21; a second end wall 22; a connecting wall 23; a top wall 231; a bottom wall 232; a side wall 233;

a pole group 30; a positive electrode terminal 31; a negative terminal 32; a sub-pole group 33; a positive electrode plate 331; a negative electrode tab 332; a diaphragm 333; a positive tab 40; and negative electrode tab 50.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The cell 10 of the present invention will be described in detail with reference to fig. 1 to 5 in conjunction with an embodiment.

As shown in fig. 1 to 5, the battery cell 10 according to the embodiment of the present invention includes: the battery pack includes a case 20 and a pole group 30, the case 20 may define an installation space therein, and the case 20 may include first and

second end walls

21 and 22 that are not coplanar, the pole group 30 may be disposed in the installation space, a positive terminal 31 and a negative terminal 32 may be connected to the pole group 30, the positive terminal 31 may be disposed on one of the first and

second end walls

21 and 22, and the negative terminal 32 may be disposed on the other of the first and

second end walls

21 and 22.

It should be noted that, the housing 20 can protect the pole group 30, the size of the mounting space defined inside the housing 20 can be adjusted according to the size of the pole group 30, the shape of the housing 20 can be adjusted according to the shape of the pole group 30, the positive terminal 31 and the negative terminal 32 connected to the pole group 30 can be respectively disposed on the first end wall 21 and the second end wall 22, specifically, as shown in fig. 1, the first end wall 21 can be disposed at the front end of the housing 20, the second end wall 22 can be disposed at the rear end of the housing 20, the front end and the rear end of the housing 20 are in the front-rear direction in fig. 1, the positive terminal 31 is disposed on the first end wall 21, and the negative terminal 32 is disposed on the second end wall 22, but it should be understood that the present invention is not limited thereto, the positive terminal 31 can be disposed on the second end wall 22, the negative terminal 32 can be disposed on the first end wall 21, since the first end wall 21 and the second end wall 22 are disposed in a non-coplanar manner, the positive terminal 31 and the negative terminal 32 of the cell are connected to avoid short circuit.

Wherein, the pole group 30 can be fixed inside the housing 20 in a welding manner to define a mounting space, the first end wall 21 and the second end wall 22 of the housing 20 can be provided with mounting holes, the positive terminal 31 and the negative terminal 32 can be fixed on the surface of the housing 20 through the mounting holes, and the connection of the pole group 30 and the housing 20 in a welding manner can make the connection of the pole group 30 and the housing 20 more stable. It is understood that the connection manner of the pole group 30 and the housing 20 is not limited thereto, and the connection manner of the pole group 30 and the housing 20 may be configured as a snap connection or the like.

Therefore, the positive terminal 31 and the negative terminal 32 are respectively arranged on the first end wall 21 and the second end wall 22, so that the short circuit caused by the connection of the positive terminal 31 and the negative terminal 32 of the battery cell 10 can be avoided, the short-circuit damage of the battery cell 10 can be avoided, and the use safety of the battery cell 10 can be improved.

In some embodiments of the present invention, the housing 20 may further include: a connection wall 23, the first and

second end walls

21 and 22 being oppositely disposed and spaced apart, the connection wall 23 may be connected between the first and

second end walls

21 and 22 to define an installation space. It is also to be construed that the connecting wall 23, the first end wall 21 and the second end wall 22 may be configured together as the housing 20, the connecting wall 23, the first end wall 21 and the second end wall 22 together defining the installation space, the first end wall 21 and the second end wall 22 being disposed opposite to each other and connected by the connecting wall 23. The first end wall 21 and the second end wall 22 are oppositely arranged, so that the first end wall 21 and the second end wall 22 are spaced apart, and the short circuit caused by the connection of the positive terminal 31 and the negative terminal 32 of the battery cell 10 can be further avoided, so that the short-circuit damage of the battery cell 10 can be further avoided, and the use safety of the battery cell 10 can be further improved.

In some embodiments of the present invention, the connecting wall 23 may include: the wall structure comprises a top wall 231, a bottom wall 232 and a side wall 233, wherein the top wall 231 and the bottom wall 232 are oppositely arranged and spaced, the side wall 233 is connected with the top wall 231, the bottom wall 232, the first end wall 21 and the second end wall 22, and the cross-sectional area of the top wall 231 is smaller than that of the bottom wall 232. It should be noted that the connecting wall 23 may include two side walls 233, as shown in fig. 1, one side wall 233 may be connected to the left end of the top wall 231, the left end of the bottom wall 232, the left end of the first end wall 21, and the left end of the second end wall 22, the other side wall 233 may be connected to the right end of the top wall 231, the right end of the bottom wall 232, the right end of the first end wall 21, and the right end of the second end wall 22, the left and right directions of the top wall 231, the bottom wall 232, the first end wall 21, and the second end wall 22 are the left and right directions in fig. 1, the cross-sectional area of the top wall 231 may be smaller than that of the bottom wall 232, the cross-sectional area of the top wall 231 may be larger than that of the bottom wall 232, and the cross-sectional areas of the top wall 231 and the bottom wall 232 may be adjusted according to the shape of the pole group 30. Like this can constitute anomalous casing 20 through making the cross-sectional area of roof 231 be less than the cross-sectional area of diapire 232, because electric core 20 is irregular shape, can install electric core 20 in the relatively narrow space of vehicle, can promote the space utilization of vehicle to electric core 20's quantity of setting on can increasing the vehicle, and then can increase the continuation of the journey mileage of vehicle.

In some embodiments of the present invention, the first end wall 21, the second end wall 22 and the connecting wall 23 are cooperatively connected to form the housing 20 having a trapezoidal structure. It should be noted that the first end wall 21 and the second end wall 22 may be configured as trapezoidal flat plates, the top wall 231, the bottom wall 232, and the side wall 233 may be configured as rectangular flat plates, and the longitudinal section of the housing 20 can be configured as a trapezoid after the first end wall 21, the second end wall 22, and the connecting wall 23 are assembled together. However, the present invention is not limited thereto, the shapes of the first end wall 21, the second end wall 22 and the connecting wall 23 may be trapezoidal, and the trapezoidal first end wall 21, the trapezoidal second end wall 22 and the trapezoidal connecting wall 23 are connected to the housing 20 which may form a conical table. It is understood that the present invention is not limited thereto, and the first end wall 21, the second end wall 22 and the connecting wall 23 may be shaped as a triangle, etc., so that the housing 20 may be formed in a triangular structure (i.e., pyramid), a trapezoidal structure, etc. This arrangement makes it possible to arrange the housing 20 into an irregularly shaped housing 20.

In some embodiments of the present invention, the cross-section of the connecting wall 23 may be configured as a semi-circular or circular structure, and the connecting wall 23 is connected between the first end wall 21 and the second end wall 22, so that the irregular shape of the housing 20 can be produced.

In some embodiments of the present invention, the pole group 30 may include: a plurality of sub-pole groups 33, the plurality of sub-pole groups 33 may be sequentially stacked to form the pole group 30, and the sub-pole group 33 may include: the positive electrode pole piece 331, the negative electrode pole piece 332 and the diaphragm 333 are sequentially laminated in the order of the diaphragm 333, the negative electrode pole piece 332, the diaphragm 333, the positive electrode pole piece 331, the diaphragm 333 and the negative electrode pole piece 332 to form the sub-pole group 33. The pole group 30 may further include: positive tab 40 and negative tab 50, positive tab 331 may be provided with positive tab 40, positive tab 40 may be connected to positive terminal 31, negative tab 332 may be provided with negative tab 50, and negative tab 50 may be connected to negative terminal 32. It should be noted that each of the sub-pole groups 33 may include one positive pole piece 331, two negative pole pieces 332, and three diaphragms 333, where the size of the diaphragm 333 between the positive pole piece 331 and the negative pole piece 332 is larger than the size of the positive pole piece 331 and the size of the negative pole piece 332, the diaphragm 333 may completely wrap the adjacent positive pole piece 331 and the negative pole piece 332, the plurality of sub-pole groups 33 may be sequentially stacked to form the pole group 30, the plurality of sub-pole groups 33 may be sequentially stacked and then fixed by an insulating tape, and the number of the sub-pole groups 33 may be specifically adjusted according to the storage capacity of the battery cell 10. The positive pole piece 331 and the negative pole piece 332 can be separated by the arrangement, the situation that the pole group 30 is damaged due to the fact that the positive pole piece 331 and the negative pole piece 332 are in direct contact with each other and short circuits are caused is avoided, the plurality of sub-pole groups 33 are stacked to form the pole group 30, the number of the sub-pole groups 33 can be adjusted according to actual requirements, and therefore electric cores with different capacities can be produced.

In some embodiments of the present invention, in a direction from the opposite end of the pole group 30 to the other end, for example: as shown in fig. 2 and fig. 3, the areas of the negative electrode tabs 332 are gradually increased from the upper end to the lower end of the electrode group 30, the areas of the positive electrode tabs 331 are sequentially increased, the projection of the positive electrode tab 331 is located in the projection range of the negative electrode tab 332 with a small area in the two adjacent negative electrode tabs 332, it should be noted that the projection of the positive electrode tab 331 is located in the projection range of the negative electrode tab 332 on the upper layer, and the projection of the negative electrode tab 332 on the upper layer in the two adjacent negative electrode tabs 332 is located in the projection range of the negative electrode tab 332 on the lower layer. It should be explained that the plurality of negative electrode pole pieces 332 have the same shape and different areas, the area of the negative electrode pole piece 332 at the lowermost end is the largest, the area of the negative electrode pole piece 332 at the uppermost end is the smallest, the shapes of the plurality of positive electrode pole pieces 331 are the same and different areas, the area of the positive electrode pole piece 331 at the lowermost end is the largest, and the area of the positive electrode pole piece 331 at the uppermost end is the smallest, so that the arrangement can ensure that the positive electrode pole piece 331 can be completely coated by two adjacent negative electrode pole pieces 332.

In some embodiments of the present invention, in a direction from one end of the pole group 30 to the other end, for example: as shown in fig. 2 and 3, the width and/or length of the plurality of negative electrode tabs 332 and the width and/or length of the plurality of positive electrode tabs 331 are sequentially increased from the upper end to the lower end of the electrode group 30. In an embodiment of the present invention, from the upper end to the lower end direction of the pole group 30, the width dimensions of the negative pole pieces 332 and the positive pole pieces 331 are sequentially increased, and the length dimension is not changed. In another embodiment of the present invention, from the upper end to the lower end of the pole group 30, the length dimensions of the negative pole pieces 332 and the positive pole pieces 331 are sequentially increased, and the width dimension is not changed. In another embodiment of the present invention, from the upper end to the lower end of the pole group 30, the length and width of the negative pole pieces 332 and the positive pole pieces 331 are increased in sequence. In this arrangement, the positive electrode tab 331, the negative electrode tab 332, and the separator 333 having different sizes are stacked in this order, whereby the irregular electrode group 30 can be manufactured.

In some embodiments of the present invention, the area of the first end wall 21 is different from the area of the second end wall 22, and/or the shape of the first end wall 21 is different from the shape of the second end wall 22. In one embodiment of the present invention, the area of the first end wall 21 is different from the area of the second end wall 22, and the shape of the first end wall 21 is the same as the shape of the second end wall 22. In another embodiment of the present invention, the area of the first end wall 21 is the same as the area of the second end wall 22, and the shape of the first end wall 21 is different from the shape of the second end wall 22. In another embodiment of the present invention, the area of the first end wall 21 and the area of the second end wall 22 are different, and the shape of the first end wall 21 and the shape of the second end wall 22 are both different. This arrangement makes it possible to provide the housing 20 with an irregularly shaped housing 20.

In some embodiments of the present invention, the shape of the pole group 30 matches the shape of the housing 20. It should be noted that the shapes of the first end wall 21 and the second end wall 22 can be adjusted according to the shape of the pole group 30, so as to ensure that the pole group 30 can be installed in the installation space of the housing 20. This arrangement ensures that the pole set 30 is mounted within the housing 20.

According to the utility model discloses battery 100 includes: the plurality of battery cells 10 may be sequentially connected to form a battery 100 with a longitudinal section in an annular structure, as shown in fig. 4, or the plurality of battery cells 10 may be sequentially connected to form a battery 100 with a longitudinal section in a parallelogram structure, as shown in fig. 5, where the battery cell 10 is the above-mentioned battery cell 10.

In a specific embodiment of the present invention, as shown in fig. 4, when the longitudinal section of the battery cell 10 is an isosceles trapezoid, six battery cells 10 are sequentially connected on the circumference, and the side wall 233 of the battery cell 10 is connected to the side wall of the adjacent battery cell 10, so as to form the battery 100 with a longitudinal section of an annular structure.

In another embodiment of the present invention, as shown in fig. 5, when the longitudinal section of the battery cell 10 is an isosceles trapezoid, from the left end to the right end in fig. 5, four battery cells 10 are connected in sequence, the top wall 231 of the battery cell 10 located at the leftmost end is located above the bottom wall 232, the top wall 231 of the second battery cell 10 located at the left end is located below the bottom wall 232, the top wall 231 of the third battery cell 10 located at the left end is located above the bottom wall 232, the top wall 231 of the battery cell 10 located at the rightmost end is located below the bottom wall 232, and the four battery cells 10 are connected in sequence to form the battery 100 with a parallelogram structure in the longitudinal section. It is understood that the present invention is not limited thereto, and the plurality of battery cells 10 may be connected in different ways to form the battery 100 with an irregular shape.

According to the utility model discloses battery 100, through setting up positive terminal 31 and negative terminal 32 respectively on first end wall 21 and second end wall 22, can avoid electric core 10's positive negative pole to connect and cause battery 100 short circuit, thereby can avoid the condition of electric core 10 short circuit damage to take place, can improve electric core 10's safety in utilization, and, also can produce irregularly shaped battery 100, can install battery 100 in the relatively constrictive space of vehicle, can promote the space utilization of vehicle, thereby can increase the quantity that sets up of battery 100 on the vehicle, and then can increase the continuation of the journey mileage of vehicle.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrical core (10), comprising:

a housing (20), the housing (20) defining an installation space therein, and the housing (20) including first and second end walls (21, 22) that are non-coplanar;

a pole group (30), the pole group (30) is arranged in the installation space, the pole group (30) is connected with a positive terminal (31) and a negative terminal (32), the positive terminal (31) is arranged on one of the first end wall (21) and the second end wall (22), and the negative terminal (32) is arranged on the other one of the first end wall (21) and the second end wall (22).

2. The battery cell (10) of claim 1, wherein the housing (20) further comprises: a connecting wall (23), the first end wall (21) and the second end wall (22) being opposed and spaced apart, the connecting wall (23) being connected between the first end wall (21) and the second end wall (22) to define the mounting space.

3. The electrical core (10) of claim 2, wherein the connecting wall (23) comprises: a top wall (231) and a bottom wall (232), and a side wall (233), the top wall (231) and the bottom wall (232) being opposed and spaced apart, the side wall (233) connecting the top wall (231), the bottom wall (232), the first end wall (21), and the second end wall (22), the top wall (231) having a cross-sectional area smaller than the cross-sectional area of the bottom wall (232).

4. The cell (10) of claim 2, wherein the first end wall (21), the second end wall (22) and the connecting wall (23) are cooperatively connected to form a housing (20) having a trapezoidal structure.

5. The electrical core (10) according to any of claims 1 to 4, wherein the pole group (30) comprises: the multi-electrode-group combined electrode comprises a plurality of sub-electrode groups (33), wherein the plurality of sub-electrode groups (33) are sequentially stacked to form the electrode group (30), each sub-electrode group (33) comprises a positive electrode pole piece (331), a negative electrode pole piece (332) and a diaphragm (333), and the sub-electrode groups (33) are sequentially stacked according to the sequence of the diaphragm (333), the negative electrode pole piece (332), the diaphragm (333), the positive electrode pole piece (331), the diaphragm (333) and the negative electrode pole piece (332).

6. The battery cell (10) of claim 5, wherein, in a direction from one end of the pole group (30) to the other end, the areas of the plurality of negative pole pieces (332) gradually increase, the areas of the plurality of positive pole pieces (331) sequentially increase, and the projection of the positive pole piece (331) is located in the projection range of the negative pole piece (332) with the smaller area in the two negative pole pieces (332) adjacent to the projection range.

7. The electrical core (10) of claim 6, wherein a plurality of the negative pole pieces (332) sequentially increase in width dimension and/or length dimension in a direction from the one end to the other end of the pole group (30).

8. The cell (10) of claim 2, wherein the first end wall (21) has an area different from an area of the second end wall (22) and/or the first end wall (21) has a shape different from a shape of the second end wall (22).

9. The electrical core (10) of claim 1, wherein the shape of the pole set (30) matches the shape of the housing (20).

10. A battery (100), comprising a plurality of battery cells (10), wherein the plurality of battery cells (10) are sequentially connected to form the battery (100) with a longitudinal section of a ring-shaped structure, or the plurality of battery cells (10) are sequentially connected to form the battery (100) with a longitudinal section of a parallelogram structure, and the battery cells (10) are the battery cells (10) according to any one of claims 1 to 9.