CN218975727U

CN218975727U - Battery monomer, power battery and electric equipment

Info

Publication number: CN218975727U
Application number: CN202223610715.8U
Authority: CN
Inventors: 文刚; 黄红光
Original assignee: GAC Aion New Energy Automobile Co Ltd
Current assignee: GAC Aion New Energy Automobile Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-05
Anticipated expiration: 2032-12-30

Abstract

The application provides a battery monomer, power battery and consumer relates to battery technology field. The battery cell includes: the first type of battery is provided with a first battery body, a first positive electrode terminal and a first negative electrode terminal; the second type battery is provided with a second battery body, a coaming, a second positive terminal and a second negative terminal, wherein the coaming is provided with a containing cavity, and the containing cavity is configured to contain the second positive terminal and/or the second negative terminal, so that when the second type battery is connected with the first type battery in series, the coaming is connected with the first type battery. The welding is convenient, so that the contact between terminals with different polarities of the first type battery and the second type battery is facilitated, and the overcurrent capacity is ensured.

Description

Battery monomer, power battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery monomer, a power battery and electric equipment.

Background

With the consumption of natural resources and increasing environmental impact, there is an increasing interest in devices in various fields that can store energy and effectively utilize the stored energy. The battery cells are systems that utilize new renewable energy that can be combined with each other.

However, in the related art, the length of the square shell blade battery is limited, most of the square shell blade battery is short blade battery, the existing scheme is only suitable for using the soft package battery to carry out series connection encapsulation to realize the form of the long blade battery, but if the soft package battery is used for carrying out series connection, because the output of the square shell blade battery is in the form of a metal cover plate, after the soft package battery is connected in series, the welding is inconvenient because the gap between two battery cores is too small, and meanwhile, a gap possibly exists between the two battery core output electrode cover plates, so that the surface contact between the two battery core output electrodes cannot be ensured, and the overcurrent capacity cannot be ensured.

Disclosure of Invention

An object of the application is to provide a battery monomer, power battery and consumer, can guarantee the overcurrent capacity.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, the present application provides a battery cell comprising: a first type of battery having a first battery body, a first positive electrode terminal disposed on one side of the first battery body, and a first negative electrode terminal disposed on the other side of the first battery body; the second type battery is provided with a second battery body, a coaming, a second positive electrode terminal and a second negative electrode terminal, wherein the second positive electrode terminal is arranged on one side of the second battery body, the second negative electrode terminal is arranged on the other side of the second battery body, the coaming is connected with the second battery body, the coaming is provided with a containing cavity, and the containing cavity is used for containing the second positive electrode terminal and/or the second negative electrode terminal, so that when the second type battery is connected with the first type battery in series, the coaming is connected with the first type battery.

In the implementation process, the first positive electrode terminal is arranged on one side of the first battery body, the first negative electrode terminal is arranged on the other side of the first battery body to form a first battery, the second positive electrode terminal is arranged on one side of the second battery body, the second negative electrode terminal is arranged on the other side of the second battery body to form a second battery, when the first battery and the second battery are connected in series, the coaming is directly connected to the first battery body, welding is facilitated, contact between terminals with different polarities of the first battery and the second battery is facilitated, and overcurrent capacity is guaranteed.

In some embodiments, the second positive terminal includes a terminal body and a contact, one side of the terminal body being provided with a number of the contacts, the contact being configured to contact the first negative terminal.

In the implementation process, the terminal body is provided with the plurality of contact pieces for contacting with the first negative electrode terminal, so that series connection of the first battery and the second battery is realized, the reliability of electric connection is ensured, the problem of poor contact between the second positive electrode terminal and the first negative electrode terminal is avoided, and the overcurrent capacity is ensured.

In some embodiments, the inner edge of the shroud is provided with a first insulating member. The insulation of the coaming can be ensured.

In some embodiments, the second type of battery further comprises a second insulator disposed at an inner edge of the coaming, and the second insulator is located between the second positive terminal and the second battery body. The insulation between the second positive terminal and the second battery body can be ensured, so that the safety of the second battery is ensured in the charge and discharge process.

In some embodiments, the second insulator has an outer edge dimension that is not less than an inner edge dimension of the shroud. The insulation between the second positive terminal and the second battery monomer is facilitated, and the safety of charging and discharging of the second battery is ensured.

In some embodiments, the second type of battery further comprises a second explosion-proof valve disposed at the second negative terminal. Through set up the second explosion-proof valve on the second negative terminal, can guarantee that the second type battery is when taking place thermal runaway, can be favorable to improving the free security of battery through the high temperature gas etc. of second explosion-proof valve emission.

In some embodiments, the first type of battery further comprises a first explosion-proof valve disposed at the first positive terminal. Through set up first explosion-proof valve on first positive terminal, can guarantee that first type battery is when taking place thermal runaway, can discharge high temperature gas etc. through first explosion-proof valve, have to do benefit to and improve battery monomer's security.

In some embodiments, the first type of battery further comprises a third insulator disposed between the first battery body and the first negative terminal. Insulation between the first battery body and the first negative electrode terminal can be ensured.

In a second aspect, the present application also provides a power cell comprising a cell as defined in any one of the preceding claims.

The power battery provided in the second aspect of the present application includes the battery cell according to the first aspect, so that all the technical effects of the foregoing embodiments are achieved, and are not described herein.

In a third aspect, the present application also provides an electrical device comprising a power cell as described above.

Because the electric equipment provided by the embodiment of the third aspect of the present application includes the power battery in the technical scheme of the second aspect, all technical effects of the foregoing embodiments are provided, and are not described herein.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings can be obtained according to these drawings without inventive effort for the users of the art.

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

Fig. 2 is a schematic view illustrating a part of a structure of a battery cell according to an embodiment of the present application.

Fig. 3 is a schematic structural view of a first type of battery cell according to an embodiment of the present disclosure.

Fig. 4 is a schematic partial structure of a first type of battery cell according to an embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of a second type of battery cell according to an embodiment of the present disclosure.

Fig. 6 is a schematic view showing a partial structure of a second type of battery of a battery cell according to an embodiment of the present application.

Reference numerals

100. A first type of battery; 101. a first battery body; 102. a first positive terminal; 103. a first negative terminal; 104. a first explosion-proof valve; 105. a third insulating member; 200. a second type of battery; 201. a second battery body; 202. coaming plate; 203. a second positive terminal; 2031. a terminal body; 2032. a contact; 204. a second negative terminal; 205. a second insulating member; 206. and a second explosion-proof valve.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments herein, without inventive effort are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships that are conventionally put in use of the inventive product, are merely for convenience of description of the present application and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood to be specific to the user of ordinary skill in the art.

Examples

The existing square shell short-blade battery has the advantages that the difficulty of a bare cell shell entering process is increased if a pole piece is too long, so that the length of the existing square shell battery is generally short, a plurality of soft package batteries of the existing long-blade battery are continuously connected in series, then the soft package batteries are packaged by an aluminum shell, when the soft package batteries are connected in series, because battery cell lugs are soft current collectors, welding and shaping of the serial connection lugs are convenient, the battery cell strings can be shaped into a regular shape and then packaged by an external aluminum shell, however, after the existing batteries are connected in series, the welding is inconvenient due to the fact that a gap between two battery cells is too small, and meanwhile, a gap possibly exists between two battery cell output pole cover plates, so that surface contact between two battery cell output poles cannot be guaranteed.

In view of this, as shown in fig. 1-6, in a first aspect, the present application provides a battery cell comprising: the first type battery 100 and the second type battery 200 can be welded in a seamless manner, so that the terminals of the first type battery 100 and the second type battery 200 with different polarities are perfectly contacted, a long blade battery is formed, the length of a battery cell pole piece can be reduced by connecting the first type battery 100 and the second type battery 200 in series, the process difficulty of putting a bare cell into a shell is reduced, and when the first type battery 100 and the second type battery 200 are connected in series, a blue film can be adopted for cladding, so that the insulativity of the whole structure is ensured.

Specifically, a first type of battery 100 includes a first battery body 101, a first positive electrode terminal 102, and a first negative electrode terminal 103, wherein the first positive electrode terminal 102 is disposed on one side of the first battery body, and the first negative electrode terminal 103 is disposed on the other side of the first battery body; the second type battery 200 includes a second battery body 201, a casing 202, a second positive electrode terminal 203, and a second negative electrode terminal 204, wherein the second positive electrode terminal 203 is disposed on one side of the second battery body 201, the second negative electrode terminal 204 is disposed on the other side of the second battery body 201, the casing 202 is connected to the second battery body 201, and the casing 202 is provided with a housing cavity configured to house the second positive electrode terminal 203 and/or the second negative electrode terminal 204 such that the casing 202 is connected to the first type battery 100 when the second type battery 200 is connected in series with the first type battery 100.

Illustratively, the shroud 202 is fixedly connected to the second battery body 201, the shroud 202 may be configured in a ring shape, and the shroud 202 may be configured one, that is, the shroud 202 may be configured to accommodate the second positive terminal 203 or the second negative terminal 204; it is of course not excluded that the shroud 202 is provided with two, i.e. one shroud 202 is adapted to receive the second positive terminal 203 and the other shroud 202 is adapted to receive the second negative terminal 204.

When the shroud 202 is configured to accommodate the second positive electrode terminal 203, the shroud 202 is welded to the first type of battery 100, and the second positive electrode terminal 203 is in contact with the first negative electrode terminal 103, so as to realize series connection of the first type of battery 100 and the second type of battery 200; when the shroud 202 is configured to receive the second negative terminal 204, the stencil is now welded to the first type of battery 100, the second negative terminal 204 is in contact with the first positive terminal 102 to effect series connection of the first type of battery 100 and the second type of battery 200; it is needless to say that the case that the enclosure 202 is used for accommodating the second positive electrode terminal 203 and the second negative electrode terminal 204 is not excluded, and two first batteries 100 are provided, each of the first batteries 100 is welded with the enclosure 202, and the two first batteries 100 are connected in series with the second batteries 200, for example, the second batteries 200 are distributed along the left-right direction, one of the first batteries 100 is connected in series with the left side of the second batteries 200, and the other first battery 100 is connected in series with the right side of the second batteries 200.

In this application, the first type battery 100 and the second type battery 200 may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, which is not limited in the embodiment of the present application.

Wherein the first battery body 101 (or the second battery body 201) includes an electrode assembly including a positive electrode tab, a negative electrode tab, and a separator, and an electrolyte. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive current collector comprises a positive current collecting part and a positive lug protruding out of the positive current collecting part, wherein the positive current collecting part is coated with a positive active material layer, and at least part of the positive lug is not coated with the positive active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode current collecting part and a negative electrode tab protruding from the negative electrode current collecting part, wherein the negative electrode current collecting part is coated with a negative electrode active material layer, and at least part of the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

In the implementation process, the first positive electrode terminal 102 is disposed on one side of the first battery body 101, the first negative electrode terminal 103 is disposed on the other side of the first battery body 101 to form the first battery 100, the second positive electrode terminal 203 is disposed on one side of the second battery body 201, and the second negative electrode terminal 204 is disposed on the other side of the second battery body 201 to form the second battery 200, when the first battery 100 and the second battery 200 are connected in series, the enclosing plate 202 is directly connected to the first battery body 101, so that welding is facilitated, and the terminals with different polarities of the first battery 100 and the second battery 200 are facilitated to contact, thereby ensuring the overcurrent capability.

As shown in fig. 5-6, the second positive terminal 203 includes a terminal body 2031 and a contact 2032, wherein a plurality of contacts 2032 are disposed on one side of the terminal body 2031, and the contact 2032 is configured to contact the first negative terminal 103, and the terminal body 2031 and the contact 2032 may be a single piece. Illustratively, the contact 2032 includes, but is not limited to, a pin, which may protrude from the outside of the shroud 202, may be recessed with respect to the outside of the shroud 202 (i.e., the pin is located inside the shroud 202), or the like, and is not particularly limited herein, as long as it is capable of abutting the first negative terminal 103 when the shroud 202 is welded to the first type battery 100, and ensuring overcurrent capability.

In the above implementation process, the terminal body 2031 is provided with a plurality of contacts 2032 for contacting with the first negative electrode terminal 103, so as to realize the series connection of the first battery 100 and the second battery 200, ensure the reliability of electrical connection, avoid the problem of poor contact between the second positive electrode terminal 203 and the first negative electrode terminal 103, and ensure the overcurrent capability.

In some embodiments, the inner edge of the shroud 202 is provided with a first insulating member, that is, the inner edge of the shroud 202 is subjected to an insulating treatment, and the first insulating member may be an insulating film or an insulating material, where the insulating material is sprayed on the inner edge of the shroud 202 by spraying, so that the insulation of the shroud 202 can be ensured.

In some embodiments, the second battery 200 further includes a second insulating member 205, where the second insulating member 205 includes, but is not limited to, an insulating patch, the second insulating member 205 is disposed on an inner edge of the shroud 202, and the second insulating member 205 is located between the second positive terminal 203 and the second battery body 201. The insulation between the second positive electrode terminal 203 and the second battery body 201 can be ensured, so that the safety of the second battery 200 is ensured during the charge and discharge process.

In some embodiments, the outer edge dimension of the second insulator 205 is not less than the inner edge dimension of the shroud 202, typically the outer edge of the second insulator 205 conforms to the inner wall of the shroud 202; the insulation between the second positive electrode terminal 203 and the second battery cell is facilitated, and the safety of charging and discharging of the second battery 200 is ensured.

Referring to fig. 5 again, the second battery 200 further includes a second explosion-proof valve 206, and the second explosion-proof valve 206 is disposed at the second negative terminal 204. By providing the second explosion-proof valve 206 on the second negative electrode terminal 204, it is possible to ensure that the second battery 200 can discharge high-temperature gas or the like through the second explosion-proof valve 206 when thermal runaway occurs, which is advantageous for improving the safety of the battery cell.

As shown in fig. 3, the first type of battery 100 further includes a first explosion-proof valve 104, and the first explosion-proof valve 104 is disposed on the first positive terminal 102. By arranging the first explosion-proof valve 104 on the first positive terminal 102, when the first battery 100 is out of control, high-temperature gas and the like can be discharged through the first explosion-proof valve 104, so that the safety of the battery cell can be improved.

As shown in fig. 4, the first type battery 100 further includes a third insulating member 105, where the third insulating member 105 includes, but is not limited to, an insulating patch, and the third insulating member 105 is disposed between the first battery body 101 and the first negative terminal 103. The insulation between the first battery body 101 and the first negative electrode terminal 103 can be ensured.

In a third aspect, the present application also provides an electrical device comprising a power cell as described above. The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular. Taking a vehicle as an example, the vehicle may further include a controller and a motor, the controller being configured to control the power battery to power the motor, for example, for operating power requirements during start-up, navigation, and travel of the vehicle.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery cell, comprising:

a first type of battery having a first battery body, a first positive electrode terminal disposed on one side of the first battery body, and a first negative electrode terminal disposed on the other side of the first battery body;

the second type battery is provided with a second battery body, a coaming, a second positive electrode terminal and a second negative electrode terminal, wherein the second positive electrode terminal is arranged on one side of the second battery body, the second negative electrode terminal is arranged on the other side of the second battery body, the coaming is connected with the second battery body, the coaming is provided with a containing cavity, and the containing cavity is used for containing the second positive electrode terminal and/or the second negative electrode terminal, so that when the second type battery is connected with the first type battery in series, the coaming is connected with the first type battery.

2. The battery cell of claim 1, wherein the second positive terminal comprises a terminal body and contacts, wherein a side of the terminal body is provided with a plurality of the contacts, the contacts being configured to contact the first negative terminal.

3. The battery cell of claim 1, wherein an inner edge of the enclosure is provided with a first insulating member.

4. The battery cell of claim 1, wherein the second type of battery further comprises a second insulator disposed at an inner edge of the shroud, and wherein the second insulator is located between the second positive terminal and the second battery body.

5. The battery cell of claim 4, wherein an outer edge dimension of the second insulator is not less than an inner edge dimension of the shroud.

6. The battery cell of claim 1, wherein the second type of battery further comprises a second explosion-proof valve disposed at the second negative terminal.

7. The battery cell of claim 1, wherein the first type of battery further comprises a first explosion-proof valve disposed at the first positive terminal.

8. The battery cell of claim 1, wherein the first type of battery further comprises a third insulator disposed between the first battery body and the first negative terminal.

9. A power cell comprising a cell according to any one of claims 1-8.

10. A powered device comprising the power cell of claim 9.