CN215070322U

CN215070322U - Parallel battery

Info

Publication number: CN215070322U
Application number: CN202120699703.3U
Authority: CN
Inventors: 王甲才; 敖桥; 陈海洋
Original assignee: Huizhou Nord Times Technology Co ltd
Current assignee: Huizhou Nord Times Technology Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-12-07
Anticipated expiration: 2031-04-06

Abstract

The present application provides a parallel battery. The parallel battery includes a gasket group and at least two unit cells connected in sequence in a predetermined direction. The single battery comprises a pole lug and a battery cell, wherein the pole lug part is positioned in the battery cell, the pole lug comprises a buckling body and a connector, a clearance hole is formed in the buckling body, and the connector is respectively connected with the battery cell and the buckling body. The gasket group is arranged on one side, close to the corresponding pole lug, of the battery cell of each single battery. And in the preset direction, the connector of the previous single battery penetrates through the buckling body of the next adjacent single battery, and the connector of the previous single battery is connected with the buckling body of the next adjacent single battery. The parallel battery has high energy density and long service life.

Description

Parallel battery

Technical Field

The utility model relates to a battery technology field especially relates to a parallelly connected battery.

Background

The lithium ion battery is widely applied to the field of new energy and the field of micro electronics, in the preparation process of the lithium ion battery, the series connection or parallel connection of the lithium ion battery monomers is always a difficult point, a plastic insulating frame is required to be used for fixing in the general lithium ion battery grouping process, and then the lithium ion battery monomers are stacked and grouped through the plastic insulating frame, but after the lithium ion battery is installed, the lithium ion battery monomers surround the plastic insulating frame, in order to increase the fixing firmness of the lithium ion battery monomers, a partition plate is generally additionally arranged between the lithium ion battery monomers, so that the heat dissipation among the lithium ion battery monomers is not facilitated, and the temperature difference of each lithium ion battery monomer under the working environment is large, so that the service life of the battery is influenced; in addition, the connection between the positive electrode lugs and the connection between the negative electrode lugs among the lithium ion battery cells need to be realized by using a bus bar and a welding metal block, the electrode lugs fall off due to the condition of insufficient welding or false welding of the electrode lugs, and the energy density is reduced due to the condition of increasing contact resistance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, provide a utmost point ear connection stability is higher, energy density is higher and the longer parallelly connected battery of life.

The purpose of the utility model is realized through the following technical scheme:

a parallel battery comprises a gasket group and at least two single batteries which are sequentially connected in a preset direction, wherein each single battery comprises a tab and a battery cell, the tab is partially positioned in the battery cell and comprises a buckling body and a connecting body, the buckling body is provided with a clearance hole, the connecting body is respectively connected with the battery cell and the buckling body, and the gasket group is arranged on one side, close to the corresponding tab, of the battery cell of each single battery;

in the preset direction, the connector of the previous single battery is inserted into the buckling body of the next adjacent single battery, and the connector of the previous single battery is connected with the buckling body of the next adjacent single battery.

In one embodiment, the battery cell of each of the single batteries includes a cell body, an outer casing and a folded body, the cell body of the battery cell of each of the single batteries is disposed in the corresponding outer casing, the connecting body of the tab of each of the single batteries is disposed in the corresponding outer casing, and a portion of the connecting body of the tab of each of the single batteries protrudes out of the outer casing and penetrates through the folded body.

In one embodiment, the outer casing of the battery cell and the corresponding folded body of each unit battery are of an integrally molded structure.

In one embodiment, the cell body of the cell of each of the single batteries includes a positive plate, a diaphragm and a negative plate, which are sequentially stacked, and the positive plate, the corresponding diaphragm and the corresponding negative plate of the cell body of the cell of each of the single batteries are disposed in the corresponding outer casing.

In one embodiment, the gasket set includes a first gasket and a second gasket, the first gasket is disposed on a side of the outer housing of the battery cell of each battery cell, which is close to the corresponding folded body, and the second gasket is disposed on a side of the folded body of the battery cell of each battery cell, which is far from the corresponding outer housing.

In one embodiment, each of the single batteries further includes a tab colloid, the tab colloid of each of the single batteries is disposed in the corresponding battery core, a part of the tab colloid of each of the single batteries protrudes from the corresponding battery core, and the tab colloid of each of the single batteries is clamped between the corresponding tab and the corresponding battery core.

In one embodiment, the parallel battery further includes a protection plate disposed on the cell of the last unit battery in the predetermined direction, and the fastening body of the tab of the last unit battery in the predetermined direction is connected to the protection plate.

In one embodiment, the protection plate includes a protection pad and a protection plate body, the protection pad is disposed on the electric core of the last unit battery in the predetermined direction, the protection plate body is disposed on a side of the protection pad away from the electric core of the last unit battery in the predetermined direction, and the fastening body of the tab of the last unit battery in the predetermined direction is connected to the protection plate body.

In one embodiment, the protection plate body is provided with a nickel plate and an electronic component, the nickel plate and the electronic component are both arranged on one side of the protection plate body away from the protection base plate, and the fastening body of the tab of the last unit cell in the predetermined direction is connected with the nickel plate.

In one embodiment, at least two of the unit cells are sequentially connected in the predetermined direction to form a unit cell group;

the parallel battery also comprises a sleeve ring which is arranged on the single battery pack in a surrounding manner.

Compared with the prior art, the utility model discloses at least, following advantage has:

the utility model discloses in the parallelly connected battery, because utmost point ear includes the lock joint body and the connector, the lock joint body is last to have seted up the clearance hole, the parallelly connected battery after the assembly is in the predetermined direction, the connector of preceding monomer battery wears to locate the lock joint body of the next monomer battery of adjacent setting, and the connector of preceding monomer battery is connected with the lock joint body of the next monomer battery of adjacent setting, each monomer battery is directly connected through the utmost point ear of self, the use of plastic insulation frame has been reduced, and then the cost of parallelly connected battery has been reduced, and avoided setting up the baffle additional between the monomer battery, be unfavorable for the heat dissipation between the monomer battery, lead to each monomer battery temperature difference under operational environment big, and then influenced battery life's problem; in addition, the lugs of the single batteries are sequentially connected through the clearance holes, so that the use of a bus bar and welding metal is reduced, the cost of the parallel batteries is further reduced, the energy density of the parallel batteries is ensured, and the problem that the lugs fall off due to insufficient welding or false welding existing between the lugs of the single batteries is also avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a parallel battery according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the parallel cell shown in FIG. 1 at A;

fig. 3 is a schematic structural view of the unit cell shown in fig. 1;

fig. 4 is a partial view of the parallel cells shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The present application provides a parallel battery. The parallel battery includes a gasket group and at least two unit cells connected in sequence in a predetermined direction. The single battery comprises a pole lug and a battery cell, wherein the pole lug part is positioned in the battery cell, the pole lug comprises a buckling body and a connector, a clearance hole is formed in the buckling body, and the connector is respectively connected with the battery cell and the buckling body. The gasket group is arranged on one side, close to the corresponding pole lug, of the battery cell of each single battery. And in the preset direction, the connector of the previous single battery penetrates through the buckling body of the next adjacent single battery, and the connector of the previous single battery is connected with the buckling body of the next adjacent single battery.

In the parallel battery, the tab comprises the buckling body and the connector, the buckling body is provided with the clearance hole, the assembled parallel battery is in the preset direction, the connector of the previous single battery is arranged in the buckling body of the next adjacent single battery in a penetrating way, and the connector of the previous single battery is connected with the buckling body of the next adjacent single battery, namely, each single battery is directly connected through the tab, so that the use of a plastic insulating frame is reduced, the cost of the parallel battery is further reduced, and the problem that the heat dissipation among the single batteries is not facilitated due to the addition of a partition plate between the single batteries, the temperature difference of each single battery in the working environment is large, and the service life of the battery is further influenced is solved; in addition, the lugs of the single batteries are sequentially connected through the clearance holes, so that the use of a bus bar and welding metal is reduced, the cost of the parallel batteries is further reduced, the energy density of the parallel batteries is ensured, and the problem that the lugs fall off due to insufficient welding or false welding existing between the lugs of the single batteries is also avoided.

Referring to fig. 1, 2 and 3 together, for better understanding of the parallel battery 10 of the present application, the parallel battery 10 of the present application is further explained as follows:

the parallel battery 10 of an embodiment includes a gasket group 200 and at least two unit batteries 100 sequentially connected in a predetermined direction a. The single battery 100 includes a tab 110 and a battery cell 120, the tab 110 is located in the battery cell 120, and part of the tab 110 protrudes out of the battery cell 120, the tab 110 includes a fastening body 111 and a connector 112, a clearance hole 1121 is formed in the fastening body 111, the battery cell 120 is connected to one end of the connector 112, and the fastening body 111 is connected to the other end of the connector 112. The gasket set 200 is disposed on one side of the battery cell 120 of each unit battery 100, which is close to the corresponding tab 110. In the predetermined direction a, the connecting body 112 of the previous single battery 100 is inserted into the buckling body 111 of the next single battery 100 that is adjacently disposed, and the connecting body 112 of the previous single battery 100 is connected with the buckling body 111 of the next single battery 100 that is adjacently disposed.

In the parallel battery 10, the tab 110 includes the fastening body 111 and the connector 112, the fastening body 111 is provided with the clearance hole 1121, the assembled parallel battery 10 is in the predetermined direction a, the connector 112 of the previous single battery 100 is inserted into the fastening body 111 of the next single battery 100 which is adjacently arranged, and the connector 112 of the previous single battery 100 is connected with the fastening body 111 of the next single battery 100 which is adjacently arranged, that is, each single battery 100 is directly connected through the tab 110 of itself, so that the use of a plastic insulating frame is reduced, the cost of the parallel battery 10 is reduced, and the problem that the temperature difference of each single battery 100 in the working environment is large and the service life of the battery is influenced due to the fact that a separator is additionally arranged between the single batteries 100 and is not beneficial to heat dissipation between the single batteries 100 is solved; in addition, the tabs 110 of the single batteries 100 are sequentially connected through the clearance holes 1121, so that the use of bus bars and welding metal is reduced, the cost of the parallel batteries 10 is further reduced, the energy density of the parallel batteries 10 is ensured, and the problem that the tabs 110 fall off due to insufficient welding or false welding existing between the tabs 110 of the single batteries 100 is also avoided.

Referring to fig. 3 and fig. 4, in one embodiment, the cell 120 of each battery cell 100 includes a cell body 121, an outer casing 122 and a folded body 123, the cell body 121 of each battery cell 120 of each battery cell 100 is disposed in the corresponding outer casing 122, the connecting body 112 of the tab 110 of each battery cell 100 is disposed in the corresponding outer casing 122, and a portion of the connecting body 112 of the tab 110 of each battery cell 100 protrudes out of the corresponding outer casing 122 and penetrates through the corresponding folded body 123, so as to ensure the basic structural integrity of the parallel batteries 10.

In one embodiment, the outer casing 122 of the battery cell 120 of each battery cell 100 and the corresponding folded body 123 are integrally formed, so that the processing procedure of the battery cell 120 of each battery cell 100 is reduced, the assembly procedure of the battery cells 100 is simplified, and the assembly efficiency of the parallel battery 10 is improved, and in addition, the connection stability and the structural compactness of the outer casing 122 of the battery cell 120 of each battery cell 100 and the corresponding folded body 123 are improved, and further, the structural stability of the battery cell 120 and the structural compactness of the battery cell 120 are improved.

Referring to fig. 1 and fig. 3 together, in one embodiment, the cell body 121 of the cell 120 of each unit battery 100 includes a positive electrode sheet 1211, a separator 1212, and a negative electrode sheet 1213, which are sequentially stacked, and the positive electrode sheet 1211, the corresponding separator 1212, and the corresponding negative electrode sheet 1213 of the cell body 121 of the cell 120 of each unit battery 100 are disposed in the corresponding outer casing 122, so as to ensure the basic structural integrity of the parallel battery 10.

Referring to fig. 1 and fig. 2, in one embodiment, the gasket set 200 includes a first gasket 210 and a second gasket 220, the first gasket 210 is disposed on a side of the outer casing 122 of the battery cell 120 of each battery cell 100, which is close to the corresponding folded body 123, and the second gasket 220 is disposed on a side of the folded body 123 of the battery cell 120 of each battery cell 100, which is far from the corresponding outer casing 122. It can be understood that one side of the outer casing 122 of the battery cell 120 of each battery cell 100, which is close to the corresponding folded body 123, and one side of the folded body 123 of the battery cell 120 of each battery cell 100, which is far away from the corresponding outer casing 122, are easily contacted with the corresponding tab 110, thereby causing a short circuit of the battery cell 100, therefore, in the parallel battery 10 of the present application, the first gasket 210 is disposed on one side of the outer casing 122 of the battery cell 120 of each battery cell 100, which is close to the corresponding folded body 123, and the second gasket 220 is disposed on one side of the folded body 123 of the battery cell 120 of each battery cell 100, which is far away from the corresponding outer casing 122, so that the contact between the tab 110 of each battery cell 100 and the corresponding battery cell 120 in the assembling process of the parallel battery 10 is effectively reduced, thereby reducing the damage rate of the parallel battery 10 in the assembling process, and improving the assembling yield of the parallel battery 10.

In one embodiment, each single battery 100 further includes a tab colloid, the tab colloid of each single battery 100 is disposed in the corresponding battery cell 120, a part of the tab colloid of each single battery 100 protrudes from the corresponding battery cell 120, and the tab colloid of each single battery 100 is sandwiched between the corresponding tab 110 and the corresponding battery cell 120. It can be understood that the tab colloid of each unit battery 100 separates the corresponding tab 110 from the corresponding outer casing 122, and part of the tab colloid of each unit battery 100 protrudes out of the corresponding outer casing 122, so that the separation of the tab 110 of each unit battery 100 from the corresponding outer casing 122 is better achieved, the probability of short circuit of the parallel batteries 10 is further better reduced, and the use safety of the parallel batteries 10 is improved.

Referring to fig. 1 and fig. 3, in one embodiment, the parallel battery 10 further includes a protection plate 130, the protection plate 130 is disposed on the electric core 120 of the last unit battery 100 in the predetermined direction a, and the fastening body 111 of the tab 110 of the last unit battery 100 in the predetermined direction a is connected to the protection plate 130. It can be understood that, because the energy density of the parallel battery 10 is high, if the parallel battery 10 is short-circuited, the parallel battery 10 will generate heat, even explode, and therefore, in the parallel battery 10 of the present application, the protection plate 130, i.e. the protection circuit board, is used to protect the parallel battery 10 in a short-circuited state, which improves the safety of the parallel battery 10.

Referring to fig. 1 and 4, in one embodiment, the protection plate 130 includes a protection pad 131 and a protection plate body 132, the protection pad 131 is disposed on the cell 120 of the last unit battery 100 in the predetermined direction a, the protection plate body 132 is disposed on a side of the protection pad 131 away from the cell 120 of the last unit battery 100 in the predetermined direction a, and the fastening body 111 of the tab 110 of the last unit battery 100 in the predetermined direction a is connected to the protection plate body 132, so that the probability of short circuit of the parallel batteries 10 is further reduced, and the safety of the parallel batteries 10 is improved.

Referring to fig. 1 and 4, in one embodiment, the protection plate body 132 is provided with a nickel plate 133 and an electronic component 134, the nickel plate 133 and the electronic component 134 are both disposed on a side of the protection plate body 132 away from the protection pad 131, and the fastening body 111 of the tab 110 of the last unit battery 100 in the predetermined direction a is connected to the nickel plate 133. It can be understood that the nickel plate 133 has better conductivity and processability, so that the fastening body 111 of the tab 110 of the unit cell 100 of the parallel battery 10 is connected with the nickel plate 133, thereby ensuring the connection stability of the protection plate body 132 and the fastening body 111 of the tab 110 of each unit cell 100, and further ensuring the functional stability of the protection plate body 132.

Referring to fig. 1, in one embodiment, at least two unit batteries 100 are sequentially connected in a predetermined direction a to form a unit battery pack. Further, the parallel battery 10 further includes a socket ring 300, and the socket ring 300 is disposed around the single battery pack, so as to further increase the connection stability of each single battery 100.

the utility model discloses in parallelly connected battery 10, because utmost point ear 110 includes lock joint body 111 and connector 112, the empty hole 1121 has been seted up on lock joint body 111, parallelly connected battery 10 after the assembly is on predetermined direction a, the lock joint body 111 of the next battery cell 100 of adjacent setting is worn to locate by connector 112 of the preceding battery cell 100, and connector 112 of the preceding battery cell 100 is connected with lock joint body 111 of the next battery cell 100 of adjacent setting, each battery cell 100 directly connects through utmost point ear 110 of self promptly, the use of plastic insulation frame has been reduced, and then the cost of parallelly connected battery 10 has been reduced, and avoided adding between battery cell 100 and establish the baffle, be unfavorable for the heat dissipation between battery cell 100, lead to each battery cell 100 temperature difference under operational environment big, and then influenced battery life's problem; in addition, the tabs 110 of the single batteries 100 are sequentially connected through the clearance holes 1121, so that the use of bus bars and welding metal is reduced, the cost of the parallel batteries 10 is further reduced, the energy density of the parallel batteries 10 is ensured, and the problem that the tabs 110 fall off due to insufficient welding or false welding existing between the tabs 110 of the single batteries 100 is also avoided.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A parallel battery, characterized in that the parallel battery comprises a gasket group and at least two single batteries which are sequentially connected in a preset direction;

each single battery comprises a tab and a battery cell, the tab is partially positioned in the battery cell and comprises a buckling body and a connecting body, the buckling body is provided with a clearance hole, and the connecting body is respectively connected with the battery cell and the buckling body;

the gasket group is arranged on one side, close to the corresponding tab, of the battery cell of each single battery;

2. The parallel battery of claim 1, wherein the cell of each of the single batteries comprises a cell body, an outer casing and a folded body, the cell body of each of the single batteries is disposed in the corresponding outer casing, the connecting body of the tab of each of the single batteries is disposed in the corresponding outer casing, and a portion of the connecting body of the tab of each of the single batteries protrudes out of the corresponding outer casing and penetrates through the corresponding folded body.

3. The parallel battery of claim 2, wherein the outer casing of the cell of each unit cell and the corresponding folded body are of an integrally formed structure.

4. The parallel battery of claim 2, wherein the cell body of the cell of each of the individual batteries comprises a positive plate, a diaphragm and a negative plate, which are sequentially stacked, and the positive plate, the corresponding diaphragm and the corresponding negative plate of the cell body of the cell of each of the individual batteries are disposed in the corresponding outer casing.

5. The parallel battery of claim 2, wherein the gasket set comprises a first gasket and a second gasket, the first gasket is disposed on a side of the outer casing of the cell of each of the unit batteries, which is close to the corresponding folded body, and the second gasket is disposed on a side of the folded body of the cell of each of the unit batteries, which is far from the corresponding outer casing.

6. The parallel battery of claim 1, wherein each of the unit batteries further comprises a tab colloid, the tab colloid of each of the unit batteries is disposed in the corresponding battery cell, and a portion of the tab colloid of each of the unit batteries protrudes from the corresponding battery cell, and the tab colloid of each of the unit batteries is sandwiched between the corresponding tab and the corresponding battery cell.

7. The parallel battery according to claim 1, further comprising a protective plate disposed on the cell of the last unit battery in the predetermined direction, wherein the fastening body of the tab of the last unit battery in the predetermined direction is connected to the protective plate.

8. The parallel battery according to claim 7, wherein the protection plate includes a protection pad disposed on the cell of the last cell in the predetermined direction, and a protection plate body disposed on a side of the protection pad away from the cell of the last cell in the predetermined direction, and the fastening body of the tab of the last cell in the predetermined direction is connected to the protection plate body.

9. The parallel battery according to claim 8, wherein a nickel plate and an electronic component are provided on the protective plate body, the nickel plate and the electronic component are both provided on a side of the protective plate body away from the protective backing plate, and the fastening body of the tab of the last unit cell in the predetermined direction is connected to the nickel plate.

10. The parallel battery according to any one of claims 1 to 9, wherein at least two of the unit batteries are sequentially connected in the predetermined direction to form a unit battery pack;