CN218101548U

CN218101548U - Battery and electric equipment

Info

Publication number: CN218101548U
Application number: CN202222210610.7U
Authority: CN
Inventors: 杨瑞福
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2022-12-20
Anticipated expiration: 2032-08-22

Abstract

The utility model discloses a battery and consumer, battery include the casing, electric core and protection shield, electric core are located in the casing, electric core with restrict out installation space between the inner wall of casing, the protection shield is located in the installation space and with electric core links to each other. The utility model discloses a battery is small, and energy density is big.

Description

Battery and electric equipment

Technical Field

The utility model relates to a battery technology field specifically, relates to a battery and an consumer who uses this battery.

Background

Batteries are devices for converting chemical energy into electrical energy, and in recent years, the demand for batteries has increased with the popularization of electronic products. However, the existing battery has the problems of large volume, low energy density and the like.

SUMMERY OF THE UTILITY MODEL

The present invention is made based on the discovery and recognition by the inventors of the following facts and problems:

in the related art, the battery includes electric core and protection shield, and in recent years, along with the demand to large capacity battery is bigger and bigger, in order to reduce the service temperature of protection shield, what the protection shield needs to be done is than thicker, and the device on the protection shield also can be correspondingly done greatly, from this, has caused the thickness that the protection plate thickness is greater than the thickness of electric core, in order to promote the outward appearance nature, the thickness size of each part of battery needs to be unanimous to the great problem of volume of battery has been caused.

Secondly, the thicker protection plate occupies more space, so that the energy density of the battery with the same volume is lower, which is not beneficial to the miniaturization and light-weight design of the large-capacity battery, and also creates a barrier for the miniaturization and light-weight design of the large-capacity battery.

The present invention aims at solving one of the technical problems in the related art at least to a certain extent.

Therefore, the embodiment of the utility model provides a battery, this battery's small, energy density is big.

The embodiment of the utility model provides a still provide an consumer of using above-mentioned battery.

The utility model discloses battery includes:

a housing;

the battery cell is arranged in the shell, and an installation space is limited between the battery cell and the inner wall of the shell;

and the protection plate is arranged in the installation space and is connected with the battery core.

The utility model discloses the battery is small, and energy density is big.

In some embodiments, the cell comprises:

a pole ear portion;

the current collecting part is provided with a head end face, the pole ear part is arranged on the head end face, and at least part of the pole ear part is arranged close to the circumferential edge of the head end face and limits the mounting space with the head end face.

In some embodiments, the current collecting portion includes a positive current collector, a negative current collector, and a separator sandwiched between the positive current collector and the negative current collector, and the tab portion includes a plurality of tabs arranged in a stack, each tab being electrically connected to the positive current collector or the negative current collector.

In some embodiments, the tab portion includes a first section disposed adjacent to a circumferential edge of the header end face and a second section connected between the first section and the current collector portion, and at least a portion of the tab of the second section is bent with respect to a length direction of the current collector portion and extends toward the first section, and the protection plate is connected to the second section.

In some embodiments, the extending direction of the first segment and the length direction of the header portion coincide.

In some embodiments, the entirety formed by the first segment and the protective plate has a first center line in a thickness direction of the battery, the current collecting part has a second center line in the thickness direction of the battery, and the first center line and the second center line are arranged in line.

In some embodiments, at least a part of the outer circumference of the protection plate is provided with a protection layer, and the protection plate comprises a component, and the component is coated in the protection layer.

In some embodiments, the protection plate is provided with a plurality of the components, the plurality of the components are coated in the same protection layer, and the protection layer can conduct heat.

In some embodiments, the protective layer is plastic.

In some embodiments, the battery includes an electrical lead coupled to the protective plate and the electrical lead passes through the housing and extends outside of the housing.

In some embodiments, the electrical conductor comprises at least one of: conductive sheets, electronic wires, and electrical connectors.

The utility model discloses consumer includes the battery as in any above-mentioned embodiment.

Drawings

Fig. 1 is a schematic perspective view of a battery according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a battery according to another embodiment of the present invention.

Fig. 3 is a schematic view of a protection plate according to an embodiment of the present invention.

Fig. 4 is a schematic side view of a protection plate according to an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view of a protection plate according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of a battery according to an embodiment of the present invention.

Fig. 7 is a schematic view of the internal structure of the battery of fig. 6.

Fig. 8 is a schematic diagram of a battery according to another embodiment of the present invention.

Reference numerals are as follows:

a housing 1;

a battery core 2; a collector portion 21; a head end face 211; a first centerline 212; a lug portion 22; a second segment 221; a first segment 222;

an installation space 3;

a protection plate 4; a second centerline 41; a plate body 42; a component 43; a protective layer 44;

an electrical lead 5; a conductive sheet 51; an electrical connector 52.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 and fig. 2, the battery of the embodiment of the present invention includes a casing 1 and a battery cell 2.

The housing 1 may be an aluminum plastic film, and the housing 1 may be a cylinder, a cuboid, or the like. Electric core 2 can assemble in casing 1, and electric core 2 can be coiling formula electric core 2, also can be for lamination formula electric core 2, restricts out installation space 3 between the inner wall of electric core 2 and casing 1. For example, a part of the battery cells 2 and the inner wall of the casing 1 may be arranged at intervals and form the installation space 3 therebetween,

protection shield 4 links to each other with electric core 2 electrical property, and protection shield 4 can include power return circuit, protection unit and electric quantity detecting element etc. and when the battery was used, protection shield 4 can play overcurrent protection's effect at battery charge-discharge in-process, and also can realize the calculation of electric quantity through the voltage that detects precision resistor and electric core 2 through electric quantity detecting element. As shown in fig. 2, the protective plate 4 may be fitted in the mounting space 3 formed between the battery cell 2 and the casing 1.

The battery of the embodiment of the utility model, protection shield 4 assembles in casing 1 and has utilized the space between electric core 2 and casing 1, from this, in the correlation technique has been avoided on the one hand, thicker protection shield 4 arranges in the outside of casing 1, and the empty condition in space between the inner wall of electric core 2 and casing 1 for protection shield 4 originally needs to occupy the space in the casing 1 outside and can save, thereby play the effect that reduces the volume of battery, be favorable to the frivolous design of battery; on the other hand, because the whole empty space of the battery is reduced, the battery has higher energy density under the same volume, and the design requirement of a large-capacity battery is met.

In some embodiments, the battery cell 2 includes a tab portion 22 and a current collecting portion 21, the current collecting portion 21 is provided with a head end surface 211, the tab portion 22 is provided on the head end surface 211, and at least a portion of the tab portion 22 is disposed adjacent to a circumferential edge of the head end surface 211 and limited by an included angle with the head end surface 211, and at least a portion of the installation space 3 may be formed in a space limited by the included angle.

The tab portion 22 may be connected to the top side of the current collecting portion 21, and the head end surface 211 may be a top end surface of the current collecting portion 21, as shown in fig. 1, the tab portion 22 may be a flat plate as a whole, the tab portion 22 may be disposed at the rightmost side of the head end surface 211, at this time, the tab portion 22 and the head end surface 211 are substantially perpendicular to each other, an included angle formed between the tab portion 22 and the head end surface 211 is a right angle, and the installation space 3 is a space within the included angle.

Therefore, the situation that the lug part 22 is arranged in the middle of the current collector to easily separate the space is avoided, the space between the lug part 22 and the shell 1 can be fully utilized, the space utilization rate is improved, and the energy density of the battery can be further improved.

In other embodiments, as shown in fig. 2, only a portion of the tab portion 22 may be flat, for example, the upper half portion of the tab portion 22 may be flat, and the upper half portion of the tab portion 22 may be disposed at the rightmost side of the head end surface 211.

In some embodiments, the current collector portion 21 includes a positive current collector, a negative current collector, and a separator sandwiched between the positive and negative current collectors, and the tab portion 22 includes a plurality of tabs arranged in a stack, each tab being electrically connected to either the positive or negative current collector.

Specifically, the collector portion 21 may include a plurality of positive current collectors, a plurality of separators, and a plurality of negative current collectors, which are alternately stacked one on another, the plurality of separators being disposed between adjacent positive and negative current collectors, respectively.

The plurality of tabs may include a plurality of positive tabs and a plurality of negative tabs, wherein the plurality of positive tabs are connected to the plurality of positive current collectors in a one-to-one correspondence, and the plurality of negative tabs are connected to the plurality of negative current collectors in a one-to-one correspondence. A portion of the plurality of positive electrode tabs may be welded and stacked in the left-right direction, and a portion of the plurality of negative electrode tabs may be welded and stacked in the left-right direction.

A plurality of anodal ears form anodal ear, and a plurality of negative pole ears form the negative pole ear, and anodal ear and the partly rightmost side that can all be for being located head end face 211 of negative pole ear, and installation space 3 forms in anodal ear, negative pole ear, the contained angle that head end face 211 formed.

In some embodiments, the tab part 22 includes a first section 222 and a second section 221, the first section 222 is disposed adjacent to the circumferential edge of the head end surface 211, the second section 221 is connected between the first section 222 and the current collecting part 21, and at least a part of the tab of the second section 221 is bent with respect to the length direction of the current collecting part 21 and extends toward the first section 222, and the protective plate 4 is connected to the second section 221.

As shown in fig. 2, the tab 22 can be substantially divided into two sections in the extending direction (vertical direction), the two sections are a first section 222 and a second section 221, wherein the first section 222 extends substantially along the vertical direction, and the second section 221 extends substantially along the left-down direction to the right-up direction, so that the first section 222 can be disposed at the circumferential edge of the head end surface 211 by bending the second section 221, thereby realizing the concentration of space and increasing the space utilization rate in the housing 1.

It is understood that the tab portion 22 may include a positive electrode tab portion and a negative electrode tab portion, each of the positive electrode tab portion and the negative electrode tab portion may include a first section 222 and a second section 221, and each of the first sections 222 of the positive electrode tab portion and the first sections 222 of the negative electrode tab portion is located at a circumferential edge position of the head end surface 211, for example, each of the first sections 222 of the positive electrode tab portion and the first sections 222 of the negative electrode tab portion may be disposed at the rightmost side of the head end surface 211 and arranged to overlap in the front-rear direction.

In some embodiments, the first segment 222 extends in the same direction as the length of the header 21. As shown in fig. 2, the first segment 222 extends substantially in the vertical direction, and the longitudinal direction of the current collecting portion 21 is also substantially in the vertical direction. Therefore, the mounting space 3 and the current collecting portion 21 can be overlapped as much as possible in the vertical direction, and the overall thickness of the battery can be reduced and the space efficiency and the energy density can be further improved compared with the case where the extending direction of the tab portion 22 and the length direction of the current collecting body are not the same.

In some embodiments, the entirety formed by the first segment 222 and the protective plate 4 has a first center line 212 in the thickness direction of the battery, the current collecting portion 21 has a second center line 41 in the thickness direction of the battery, and the first center line 212 and the second center line 41 are arranged in line.

As shown in fig. 2, the protection plate 4 may be fixed to the left side of the first segment 222, the first center line 212 is a middle axis of the protection plate 4 and the first segment 222 in the left-right direction, and the second center line 41 is a middle axis of the current collecting portion 21 in the left-right direction. The first center line 212 and the second center line 41 both extend along the vertical direction, and the first center line 212 and the second center line 41 are overlapped on the same straight line.

Therefore, on one hand, the symmetry of the battery can be enhanced, so that the overall structural arrangement of the battery is more reasonable, on the other hand, the current collecting part 21 and the whole formed by the protection plate 4 and the first section 222 are completely overlapped in the vertical direction, and at the moment, the overall thickness of the battery can be designed according to the whole formed by the protection plate 4 and the first section 222.

In some embodiments, at least a portion of the protective plate 4 is provided with a protective layer 44 on the outer periphery side, and the protective plate 4 includes a component 43, and the component 43 is enclosed in the protective layer 44.

As shown in fig. 3 to 5, the protection plate 4 includes a plate body 42 and a component 43, the plate body 42 may be a Printed Circuit Board (PCB), and the protection plate 4 may be disposed in a protection layer 44 as a whole, that is, the protection layer 44 may completely cover the protection plate 4, for example, both the plate body 42 and the component 43 are covered in the protection layer 44.

Therefore, after the protection plate 4 is arranged in the shell 1 of the battery, the protection layer 44 can separate the component 43 on the protection plate 4 from the electrolyte in the shell 1, so that the condition that the component 43 is corroded by the electrolyte is avoided, the problem that the component 43 is easy to be abnormal due to long-term contact with the electrolyte is further avoided, and the protection effect is achieved.

It is understood that in other embodiments, as shown in fig. 5, the protective layer 44 may only completely cover the component 43, for example, the protective layer 44 may be hermetically connected to the board 42, the board 42 has certain protective properties (corrosion protection, etc.), and the component 43 may be completely covered in the protective layer 44.

In some embodiments, the protection plate 4 is provided with a plurality of components 43, the plurality of components 43 are enclosed in the same protection layer 44, and the protection layer 44 is heat conductive. As shown in fig. 3, a plurality of components 43 may be disposed on the same side of the plate body 42 of the protection plate 4, the protection layer 44 may be connected to the plate body 42, and the plurality of components 43 are all covered in the protection layer 44. The protective layer 44 may be formed from a thermally conductive material.

Therefore, when the heat dissipation structure is used, on one hand, the heat dissipation performance of the protection plate 4 can be enhanced, namely, heat on the components 43 can be quickly dissipated through the protection layer 44, on the other hand, the temperature of each part on the protection plate 4 can be balanced, and the temperature difference between the components 43 can also be reduced, for example, the number of the local components 43 of the plate body 42 of the protection plate 4 is large, the number of the local components 43 is small, heat at the part with the large number of the components 43 can be transmitted to the part with the small number of the components 43 through the protection layer 44, so that the working conditions at all parts of the protection plate 4 are basically consistent, and the operation performance of the protection plate 4 is favorably ensured.

In addition, the protective layer 44 can also balance the temperature of the electrolyte on the peripheral side of the protective plate 4, that is, the situation that the local temperature of the electrolyte is high and the local temperature is low can be alleviated, and the operation performance of the battery can be improved.

In some embodiments, the protective layer 44 is plastic. For example, the protective layer 44 may be epoxy resin, and the protective layer 44 may be connected and fixed with the board body 42 by injection molding.

In some embodiments, as shown in fig. 2, the battery comprises an electrical lead 5, the electrical lead 5 is connected to the protective plate 4, and the electrical lead 5 passes through the housing 1 and extends to the outside of the housing 1. In use, the electrical lead 5 can be connected to an external device, so that the use requirements of battery power or charging can be fulfilled. It should be noted that the mating portion of the electrical conducting member 5 and the housing 1 needs to be sealed, so as to avoid battery leakage.

In some embodiments, the electrical conductor 5 comprises at least one of: a conductive sheet 51, an electronic wire, and an electrical connector 52. For example, as shown in fig. 6 and 7, the electrical conductor 5 may be a conductive strip 51, in other embodiments, as shown in fig. 8, the electrical conductor 5 may also be an electrical connector 52, and the electrical connector 52 may be a plug-in connector, a bayonet connector, or the like.

The following describes the electric equipment according to the embodiment of the present invention.

The utility model discloses consumer includes the battery, and the battery can be the battery of description in the above-mentioned embodiment. The electric equipment can be a mobile phone, a tablet, an aircraft, an automobile, a manipulator and the like, and can also be other equipment needing a battery. The utility model discloses the energy density of consumer's battery is big, under the condition that uses battery capacity the same, can realize miniaturization, the frivolousization of battery. Secondly, under the condition that the battery volumes are consistent, the battery capacity can be improved, and therefore the design requirement of the battery capacity can be met.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "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 disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations to the above embodiments by those of ordinary skill in the art are intended to be within the scope of the present invention.

Claims

1. A battery, comprising:

a housing;

2. The battery of claim 1, wherein the cell comprises:

a lug portion;

3. The battery of claim 2, wherein the current collector portion includes a positive current collector, a negative current collector, and a separator sandwiched between the positive and negative current collectors, and the tab portion includes a plurality of tabs arranged in a stack, each tab being electrically connected to either the positive or negative current collector.

4. The battery of claim 3, wherein the tab portion includes a first segment disposed adjacent a circumferential edge of the head end face and a second segment connected between the first segment and the current collector portion, and wherein at least a portion of the tab of the second segment is bent with respect to a length of the current collector portion and extends toward the first segment, and the protective plate is connected to the second segment.

5. The battery according to claim 4, wherein an extending direction of the first segment coincides with a length direction of the current collecting part.

6. The battery according to claim 4, wherein the entirety of the first segment and the protective plate has a first center line in a thickness direction of the battery, and the current collecting portion has a second center line in the thickness direction of the battery, the first center line and the second center line being arranged collinearly.

7. The battery according to any one of claims 1 to 6, wherein at least a part of the outer circumferential side of the protective plate is provided with a protective layer, and the protective plate includes a component, and the component is enclosed in the protective layer.

8. The battery of claim 7, wherein the protective plate is provided with a plurality of the components, the plurality of components are encapsulated in the same protective layer, and the protective layer is thermally conductive.

9. The battery of claim 7, wherein the protective layer is plastic.

10. The battery according to any one of claims 1 to 6, comprising an electrical lead connected to the protective plate and passing through the case and extending to the outside of the case.

11. The battery of claim 10, wherein the electrical lead comprises at least one of: conductive sheets, electronic wires, and electrical connectors.

12. An electrical consumer, characterized in that it comprises a battery according to any one of claims 1-11.