CN216850121U

CN216850121U - Battery and electronic equipment

Info

Publication number: CN216850121U
Application number: CN202220567479.7U
Authority: CN
Inventors: 孙雷明
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-06-28
Anticipated expiration: 2032-03-15

Abstract

The utility model provides a battery and electronic equipment, the battery includes first electric core, second electric core, membrane shell and distance piece, and membrane shell and distance piece cooperate and form first holding chamber and second holding chamber, and first electric core and second electric core set up respectively in first holding chamber and second holding chamber, pass through the distance piece interval between first electric core and the second electric core. Like this, through establishing ties in the inside first electric core of setting of membrane shell and second electricity core, under the unchangeable condition of battery gross capacity, reduce the capacity of single electric core to reduce the battery temperature rise, and set up first electric core and second electricity core respectively in membrane shell and the first holding chamber and the second holding chamber that the spacer cooperatees and form, through the spacer interval, reduced the interval material that sets up between first electric core and second electricity core, thereby promote the energy density of battery.

Description

Battery and electronic equipment

Technical Field

The utility model relates to a battery technology field especially relates to a battery and electronic equipment.

Background

With the development of battery technology, higher requirements are put on the energy density of polymer lithium batteries. It is common to increase the capacity of the cell to increase the energy density. However, when the battery cell capacity is large, the battery cell temperature rise is large during high-magnification charging; the reduction of the cell capacity can reduce the temperature rise of the cell, but the loss of energy density is large.

Therefore, the battery in the prior art has the problem of low energy density under the condition of reducing the temperature rise of the battery core.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a battery and electronic equipment to solve among the prior art battery energy density lower problem under the condition that reduces electric core temperature rise.

An embodiment of the utility model provides a battery, including first electric core, second electric core, membrane shell and distance piece, the membrane shell with the distance piece cooperatees and forms first holding chamber and second holding chamber, first electric core with the second electric core set up respectively in first holding chamber with in the second holding chamber, first electric core with pass through between the second electric core the distance piece interval.

Optionally, the first battery cell and the second battery cell are stacked and symmetrically arranged with the spacer.

Optionally, the spacer includes a first part and a second part, the first part and the second part are respectively recessed towards opposite directions to form a first groove and a second groove, the first groove and the membrane shell cooperate to form the first accommodating cavity, and the second groove and the membrane shell cooperate to form the second accommodating cavity.

Optionally, the film shell includes a substrate layer, an aluminum layer, and a heat-sealing layer, where the aluminum layer is disposed on the surface of the substrate layer, and the heat-sealing layer is disposed on the surface of the aluminum layer.

Optionally, the film shell further comprises an adhesive layer, and the adhesive layer is disposed between the substrate layer and the aluminum layer, and between the aluminum layer and the heat seal layer.

Optionally, the substrate layer is polyethylene terephthalate PET.

Optionally, the membrane shell and the spacer are of an integrally molded structure.

Optionally, the spacer comprises a heat seal layer, an aluminum layer and a heat seal layer arranged in sequence.

Optionally, the battery includes a sealing portion, and the sealing portion includes a substrate layer, an aluminum layer, a heat-sealing layer after melting, an aluminum layer, and a substrate layer, which are sequentially stacked.

The embodiment of the utility model provides an electronic equipment is still provided, including foretell battery.

The embodiment of the utility model provides an in, set up first electric core and second electric core through establishing ties inside the membrane shell, under the unchangeable condition of battery total capacity, reduce the capacity of single electric core to reduce the battery temperature rise, and set up first electric core and second electric core respectively in membrane shell and the first holding chamber and the second holding chamber that the spacer cooperatees and form, through the spacer interval, reduced the interval material of setting between first electric core and second electric core, thereby promote the energy density of battery.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

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

fig. 2 is a second schematic structural diagram of a battery according to an embodiment of the present invention;

fig. 3 is one of the structural schematic diagrams of a membrane shell and a spacer of a battery provided by an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of a membrane shell and a spacer of a battery according to an embodiment of the present invention;

fig. 5 is a third schematic structural diagram of a membrane shell and a spacer of a battery according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a sealing portion of a battery according to an embodiment of the present invention;

fig. 7 is a second schematic structural view of a sealing portion of a battery according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be understood that the structures so used are interchangeable under appropriate circumstances such that embodiments of the invention can be practiced in sequences other than those illustrated or described herein, and the terms "first," "second," and the like are generally used herein in a generic sense without limitation to the number of terms, e.g., the first term can be one, or more than one.

The embodiment of the utility model provides a battery, as shown in fig. 1 to 7, including first electric core 101, second electric core 102, membrane shell 201 and distance piece 202 cooperate and form first holding chamber 203 and second holding chamber 204, and first electric core 101 and second electric core 102 set up respectively in first holding chamber 203 and second holding chamber 204, through distance piece 202 interval between first electric core 101 and the second electric core 102, and first electric core 101 and second electric core 102 can establish ties and set up.

In this embodiment, through set up first electric core 101 and second electric core 102 at the inside series connection of membrane shell 201, under the unchangeable circumstances of battery total capacity, reduce the capacity of single electric core, in order to reduce the battery temperature rise, and set up first electric core 101 and second electric core 102 respectively in membrane shell 201 and the first holding chamber 203 and the second holding chamber 204 that spacer 202 cooperateed and form, through spacer 202 interval, reduced the spacer material that sets up between first electric core 101 and second electric core 102, thereby promote the energy density of battery.

Before assembly, the film casing 201 and the spacer 202 may be of an integrally molded structure, so as to enhance stability of the battery and reduce the possibility that the spacer 202 falls off between the first battery cell 101 and the second battery cell 102.

Specifically, as shown in fig. 5, the film shell 201 may include a substrate layer 2011, an aluminum layer 2012 and a heat seal layer 2013, the aluminum layer 2012 is disposed on the surface of the substrate layer 2011, the heat seal layer 2013 is disposed on the surface of the aluminum layer 2012, and the substrate layer 2011 is disposed on the inner layer, so that the film shell 201 can be molded during melting. An aluminum layer 2012 and a heat-sealing layer 2013 are sequentially arranged from the base material layer 2011 to the outer layer, the aluminum layer 2012 can enhance the strength of the film shell 201, reduce the damage of the first electric core 101 and the second electric core 102 when the battery falls and collides, and improve the safety of the battery; after the first battery cell 101 and the second battery cell 102 are assembled, the film shell 201 is hinged, when the heat-sealing layer 2013 is heated to a preset temperature, the heat-sealing layer 2013 starts to melt and bond, and the joint of the hinge is sealed through the heat-sealing layer 2013, so that the electrolyte is prevented from leaking. The base material layer 2011, the aluminum layer 2012 and the heat sealing layer 2013 can be fixed through adhesive layers to enhance the bonding effect. The material of the substrate layer 2011 may include polyethylene terephthalate PET, or nylon.

Alternatively, the spacer 202 may include a heat seal layer 2013, an aluminum layer 2012, and a heat seal layer 2013 disposed in this order.

The aluminum layer 2012 is arranged in the spacer 202 to enhance the strength of the spacer 202, reduce the damage of the first battery cell 101 and the second battery cell 102 when the battery falls and collides, and improve the safety of the battery, and the heat sealing layers 2013 are respectively arranged on two sides of the aluminum layer 2012 to improve the sealing effect of the battery after the hinge.

Alternatively, as shown in fig. 6, the battery may include a sealing portion including a base material layer 601, an aluminum layer 602, a heat seal layer 603 after melting, an aluminum layer 604, a heat seal layer 605 after melting, an aluminum layer 606, and a base material layer 607, which are stacked in this order.

In this embodiment, the sealing portion may be an edge seal of the battery, after the first cell 101 and the second cell 102 are assembled, the film shell 201 and the spacer 202 are subjected to a hinge operation, when the heat seal layer 2013 is heated to a preset temperature, the heat seal layer 2013 starts to melt and bond, and the joint of the hinge is sealed by the heat seal layer 2013 to form the sealing portion.

The membrane casing 201 may include an upper membrane casing provided with the first cell 101 and a lower membrane casing provided with the second cell 102, and the membrane casing 201 and the spacer 202 are hinge-operated, and the spacer 202 is disposed between the upper membrane casing and the lower membrane casing. The substrate layer 601 and the aluminum layer 602 may be a substrate layer 2011 and an aluminum layer 2012 of the upper film shell, the heat seal layer 603 after melting may be a heat seal layer formed after the heat seal layer 2013 of the upper film shell and the heat seal layer 2013 of the spacer 202 are melted, the aluminum layer 604 may be an aluminum layer 2012 of the spacer 202, the heat seal layer 605 after melting may be a heat seal layer formed after the heat seal layer 2013 of the spacer 202 and the heat seal layer 2013 of the lower film shell are melted, and the aluminum layer 606 and the substrate layer 607 may be an aluminum layer 2012 and a substrate layer 2011 of the lower film shell, respectively. By providing the seal portion in this manner, the seal portion includes the base material layer 601, the aluminum layer 602, the heat seal layer 603 after melting, the aluminum layer 604, the heat seal layer 605 after melting, the aluminum layer 606, and the base material layer 607 which are stacked in this order, and thus the effect of fixing the spacer 202 is enhanced and the spacer 202 is less likely to fall off.

In another embodiment, as shown in fig. 7, the sealing portion may include a base material layer 601, an aluminum layer 602, a heat seal layer 603 after melting, an aluminum layer 606, and a base material layer 607, which are stacked in this order.

In this embodiment, the aluminum layer 2012 is disposed in the assembly region of the spacer 202 to enhance the strength of the assembly region of the spacer 202, so as to reduce the damage of the first battery cell 101 and the second battery cell 102 when the battery falls or collides, and improve the safety of the battery. The assembly region may be a region where the spacer 202 abuts against the first battery cell 101 and the second battery cell 102, and the aluminum layer 2012 is not provided in the edge sealing region of the spacer 202, so as to enhance the sealing effect.

The membrane casing 201 may include an upper membrane casing provided with the first cell 101 and a lower membrane casing provided with the second cell 102, and the membrane casing 201 and the spacer 202 are hinge-operated, and the spacer 202 is disposed between the upper membrane casing and the lower membrane casing. The base material layer 601 and the aluminum layer 602 may be a base material layer 2011 and an aluminum layer 2012 of the upper film shell, the heat-seal layer 603 after melting may be a heat-seal layer 2013 of the upper film shell, a heat-seal layer 2013 of the spacer 202, and a heat-seal layer 2013 of the lower film shell after melting, and the aluminum layer 606 and the base material layer 607 may be an aluminum layer 2012 and a base material layer 2011 of the lower film shell, respectively. In this way, by providing the sealing section including the base layer 601, the aluminum layer 602, the heat seal layer 603 after melting, the aluminum layer 606, and the base layer 607, which are stacked in this order, the sealing performance of the battery is improved, and leakage of the electrolyte is avoided.

Optionally, the first battery cell 101 and the second battery cell 102 are stacked and symmetrically arranged with the spacer 202.

In the present embodiment, as shown in fig. 1 and 3, before the first cell 101 and the second cell 102 are assembled, the film casing 201 may be in a flat state, and the spacer 202 is disposed on the film casing 201 and perpendicular to the film casing 201 in the flat state. The membrane housing 201 is subjected to a punching process so that two pits having the same size and shape are formed in the membrane housing 201, and the spacer 202 is disposed between the two pits, and the distance from the center position of the two pits to the spacer 202 is equal. After the first battery cell 101 and the second battery cell 102 are respectively disposed in the two pits, the film casing 201 is wound, so that the first battery cell 101 and the second battery cell 102 are stacked in the vertical direction and symmetrically disposed with the spacer 202. In this way, by arranging the first battery cell 101 and the second battery cell 102 in series inside the film shell 201, the capacity of a single battery cell is reduced under the condition that the total capacity of the battery is not changed, so as to reduce the temperature rise of the battery; and the spacer material disposed between the first cell 101 and the second cell 102 is reduced, thereby improving the energy density of the battery.

As example 1, a conventional foil may be used, and an active material, a conductive agent, an adhesive, and the like may be mixed and then coated on the foil in a known manner; rolling, sheet making and winding are carried out, a first battery cell 101 and a second battery cell 102 are respectively manufactured, then the film shell 201 is punched, and the first battery cell 101 and the second battery cell 102 are respectively arranged in a first accommodating cavity 203 and a second accommodating cavity 204 and are connected in series; hinge encapsulation is carried out again for interval material between first electric core 101 and the second electric core 102 has and only spacer 202, then annotates the liquid, becomes processes such as, makes the utility model provides a battery.

As comparative example 1 of example 1, a conventional foil may be used in a known manner, and an active material, a conductive agent, an adhesive, etc. may be mixed and then coated on the foil; rolling, sheet making and winding are carried out, and a third battery cell and a fourth battery cell are respectively manufactured; then, the working procedures of hinge packaging, liquid injection, formation and the like are carried out, and a first battery and a second battery are respectively manufactured; and then the first battery and the second battery are connected in series to form a battery pack. The material and the manufacturing method of the third battery cell in the battery pack are the same as those of the first battery cell 101, the material and the manufacturing method of the fourth battery cell are the same as those of the second battery cell 102, and the material of the film casing for packaging the battery cells is the same.

Example 1 differs from comparative example 1 in that: in embodiment 1, the first cell 101 and the second cell 102 are disposed inside the film casing 201, and the spacer 202 is the only spacer material between the first cell 101 and the second cell 102; in comparative example 1, the third cell and the fourth cell are respectively disposed in different membrane shells, and the spacer material between the third cell and the fourth cell at least includes a two-layer membrane shell structure.

The batteries and the battery packs of example 1 and comparative example 1 were subjected to a high-rate charge test, and temperature rise data and energy density data were recorded, respectively, and the test results are shown in table 1 below:

	temperature rise during charging	Energy density
			Comparative example 1	11.2℃	685Wh/L
Example 1	11.1℃	692Wh/L

Adopt the embodiment of the utility model provides a battery that the mode prepared obtained can normal production use to the energy density of more conventional structure battery can improve more than 5 Wh/L. Under the condition that the total capacity of the battery is not changed, the capacity of a single battery cell is reduced to reduce the temperature rise of the battery, the first battery cell 101 and the second battery cell 102 are respectively arranged in the first accommodating cavity 203 and the second accommodating cavity 204 formed by matching the film shell 201 and the spacer 202, and the spacer 202 is used for spacing, so that the spacing material arranged between the first battery cell 101 and the second battery cell 102 is reduced, and the energy density of the battery is improved.

In other alternative embodiments, the spacer 202 may further include a first part and a second part, the first part and the second part are recessed toward opposite directions to form a first groove and a second groove, respectively, the first groove cooperates with the membrane housing 201 to form the first receiving cavity 203, and the second groove cooperates with the membrane housing 201 to form the second receiving cavity 204.

In the present embodiment, as shown in fig. 2 and 4, before the first cell 101 and the second cell 102 are assembled, the film casing 201 may be in a flat state, and the spacer 202 is disposed on the film casing 201 and perpendicular to the film casing 201 in the flat state. The membrane housing 201 is subjected to a punching process so that two pits having the same size and shape are formed in the membrane housing 201, and the spacer 202 is disposed between the two pits, wherein the distance from the center position of one pit to the spacer 202 is larger than the distance from the center position of the other pit to the spacer 202. After setting up first electric core 101 and second electric core 102 respectively at these two pits, convolute membrane shell 201 for spacing piece 202 is bent and is formed first part and second part, and first part and second part are sunken to form first recess and second recess towards opposite direction respectively, and first recess cooperatees with membrane shell 201 and forms first holding chamber 203, and the second recess cooperatees with membrane shell 201 and forms second holding chamber 204. In this way, the first battery cell 101 and the second battery cell 102 are arranged in the membrane shell 201 in series in the horizontal direction, and under the condition that the total capacity of the battery is not changed, the capacity of a single battery cell is reduced so as to reduce the temperature rise of the battery; and the spacer material disposed between the first cell 101 and the second cell 102 is reduced, thereby improving the energy density of the battery.

The electronic device may be a notebook computer, a smart phone, or the like, and is not limited herein. The implementation manner of the embodiment of the battery is also suitable for the embodiment of the electronic device, and can achieve the same technical effect, which is not described herein again.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus of the embodiments of the present invention is not limited to performing functions in the order discussed, but may include performing functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a battery, its characterized in that includes first electric core, second electric core, membrane shell and distance piece, the membrane shell with the distance piece cooperatees and forms first holding chamber and second holding chamber, first electric core with the second electric core set up respectively in first holding chamber with in the second holding chamber, first electric core with pass through between the second electric core the distance piece interval.

2. The battery of claim 1, wherein the first cell and the second cell are stacked and are symmetrically disposed about the spacer.

3. The battery of claim 1, wherein the spacer comprises a first part and a second part, the first part and the second part being recessed in opposite directions to form a first recess and a second recess, respectively, the first recess cooperating with the membrane shell to form the first receiving cavity, and the second recess cooperating with the membrane shell to form the second receiving cavity.

4. The battery of claim 1, wherein the film shell comprises a substrate layer, an aluminum layer, and a heat seal layer, wherein the aluminum layer is disposed on a surface of the substrate layer, and the heat seal layer is disposed on a surface of the aluminum layer.

5. The battery of claim 4, wherein the film can further comprises an adhesive layer disposed between the substrate layer and the aluminum layer, and between the aluminum layer and the heat seal layer.

6. The battery of claim 4, wherein the substrate layer is polyethylene terephthalate (PET).

7. The battery of any of claims 1-6, wherein the membrane shell and the spacer are of an integrally molded construction.

8. The battery according to any one of claims 1 to 6, wherein the spacer comprises a heat-seal layer, an aluminum layer, and a heat-seal layer, which are disposed in this order.

9. The battery according to any one of claims 1 to 6, wherein the battery comprises a sealing portion comprising a base material layer, an aluminum layer, a heat-seal layer after melting, an aluminum layer, and a base material layer, which are stacked in this order.

10. An electronic device characterized by comprising the battery according to any one of claims 1 to 9.