CN218827706U

CN218827706U - Battery module, battery package and consumer

Info

Publication number: CN218827706U
Application number: CN202223171161.6U
Authority: CN
Inventors: 吕泽栋
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-04-07
Anticipated expiration: 2032-11-24

Abstract

The application discloses battery module includes: the battery comprises a single battery body and a plurality of battery units, wherein the single battery body comprises a pole, the pole is provided with a first connecting part, and the first connecting part is provided with a conductive surface; the cover cap is provided with at least two second connecting parts which are respectively matched with the first connecting parts of at least two single batteries; the first connecting portion and the second connecting portion are electrically connected through the conductive surface, the whole surface of the conductive surface has overcurrent capacity, and the area of the conductive surface is larger than the cross sectional area of the pole. First connecting portion and second connecting portion form the electricity through the conducting surface and connect in this application, and the area of conducting surface is greater than the cross-sectional area of utmost point post. The contact area between the single battery and the cover cap is increased, and the overcurrent capacity between the single batteries is improved.

Description

Battery module, battery package and consumer

Technical Field

The application relates to battery module electricity connection technical field generally, particularly relates to a battery module, battery package and consumer.

Background

With the increasing prominence of global warming and energy shortage, in recent years, lithium ion batteries are applied to various industries due to good cycle performance, good discharge performance, environmental protection advantages and the like, and the rapid development of electric automobiles greatly promotes the innovation and development of lithium ion battery technology.

In the related art, the plurality of battery cells in the battery module are electrically connected by using aluminum bars, and the aluminum bars are fixed to the battery cells by using a welding technique. The main problems are as follows: on the one hand, welding efficiency is low, difficult dismouting leads to repairing the difficulty, influences production efficiency. On the other hand, the connection formed by welding is a local contact, the contact area between the terminal post and the aluminum bar is very limited, so that the overcurrent capacity between the battery cells is affected, and the stability of the electrical connection is insufficient.

Disclosure of Invention

A primary objective of the present application is to provide a battery module, a battery pack and an electric device, which establish an electrical connection relationship in the form of a conductive surface, increase an over-current area, and further overcome one or more problems caused by limitations and defects of the related art at least to a certain extent.

In order to achieve the purpose of the application, the following technical scheme is adopted in the application:

according to an aspect of the present application, there is provided a battery module including:

the battery comprises a single battery body and a plurality of battery modules, wherein the single battery body comprises a pole, the pole is provided with a first connecting part, and the first connecting part is provided with a conductive surface;

the cover cap is provided with at least two second connecting parts which are respectively matched with the first connecting parts of at least two single batteries;

the first connecting portion and the second connecting portion are electrically connected through the conducting surface, the whole surface of the conducting surface has overcurrent capacity, and the area of the conducting surface is larger than the cross-sectional area of the pole.

In this application, form the electricity with first connecting portion and second connecting portion through the conducting surface and connect, the area of conducting surface is greater than the cross-sectional area of utmost point post. The contact area between the single battery and the cover cap is increased, and the overcurrent capacity between the single batteries is improved.

According to an embodiment of the present application, the first connection portion and the second connection portion are closely connected by an adhesive having conductivity.

In this application, through adopting the adhesive that has electric conductivity to connect first connecting portion and second connecting portion, solved the problem of welding mode inefficiency, difficult dismouting, improved production efficiency, also convenient to detach, reprocess.

According to an embodiment of the present disclosure, a groove is formed in a top surface of the first connecting portion, and the adhesive is filled in the groove.

In this application, offer the recess through the top surface at first connecting portion, can be used for filling the adhesive, can increase the dosage of adhesive, be favorable to strengthening the stability that first connecting portion and second connecting portion are connected.

According to an embodiment of the present application, the groove is a cylindrical groove, the diameter of the groove is 3 to 6mm, and the depth of the groove is 0.5 to 2mm.

In this application, when the recess adopted diameter 3 ~ 6mm and degree of depth 0.5 ~ 2 mm's specification, the adhesion stability of first connecting portion and second connecting portion is good, possesses better ability of overflowing.

According to an embodiment of the present application, the second connecting portion has a through hole for injecting an adhesive.

In this application, through seting up the through-hole on the second connecting portion for inject the adhesive, can inject the adhesive after first connecting portion and the cooperation of second connecting portion, can adapt to dry fast adhesive, the benefit after the cooperation of also being convenient for glues and the injecting glue, and the two adhesion is better.

According to an embodiment of the present application, the first connection portion has a top surface and a side surface, and at least one of the top surface and the side surface is a conductive surface.

In this application, form the conducting surface with the top surface and the side of first connecting portion at least one side, can effectively increase the electric connection area between first connecting portion and the second connecting portion, reinforcing overcurrent capacity.

According to an embodiment of the present application, a side surface of the first connecting portion is a conductive surface, and the second connecting portion is sleeved on the first connecting portion and electrically connected to the side surface of the first connecting portion.

In this application, the mode that the second connecting portion were established through the cover is connected with first connecting portion, and the equipment is convenient, quick, can realize increasing the purpose of flow area again.

According to an embodiment of the present application, the cap includes a connecting plate and two second connecting portions, and the two second connecting portions are respectively disposed at two end portions of the connecting plate.

In this application, the connecting plate both ends set up second connecting portion respectively, can realize establishing ties or parallelly connected with two battery monomer connections. The second connecting part is arranged at the end part of the connecting plate, so that the body length of the connecting plate is reduced.

According to an embodiment of the present application, the second connection portion includes a side wall in a cylindrical shape, and the side wall of the second connection portion is tightly fitted with a side surface of the first connection portion.

In this application, the second connecting portion form closely to cooperate with first connecting portion with the lateral wall of cylindric, to battery monomer different position relation strong adaptability, the matched stack is convenient. The side wall is electrically connected with the conductive surface, so that the overcurrent capacity is good.

According to an embodiment of the present application, the second connecting portion further includes a bottom wall formed at the bottom of the side wall, the top surface and the side surface of the first connecting portion are conductive surfaces, and the top surface and the side surface of the first connecting portion are in contact with the side wall and the bottom wall of the second connecting portion, respectively.

In this application, the top surface and the bottom surface of first connecting portion have all formed the conducting surface, very big increase the area of contact of utmost point post and block, guarantee the current capacity.

According to an embodiment of the present application, a cross section of a side wall of the second connecting portion is circular, and a diameter of the cross section of the side wall is larger than a width of the connecting plate.

In this application, guarantee the area of contact of second connecting portion and first connecting portion, the size of control connection board again simultaneously is favorable to the realization of the light demand of battery module.

According to an embodiment of the present application, the side wall is provided with a plurality of notches.

In this application, through seting up the notch on the lateral wall for the lateral wall has certain elasticity, and the first connecting portion of being convenient for stretches into the second connecting portion, and the second connecting portion can be better form the tight fit with first connecting portion.

According to another aspect of the present application, a battery pack includes at least one battery module as described above.

In this application, the battery has increased the area that overflows between the battery monomer through adopting foretell battery module, improves the current capacity between the battery monomer.

According to still another aspect of the present application, an electric device includes the battery described above.

In this application, consumer has increased the area that overflows between the battery monomer through adopting foretell battery, improves the ability of overflowing between the battery monomer.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The above and other features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic view illustrating the structure of a battery module according to an exemplary embodiment;

fig. 2 is an exploded structural view illustrating a battery module according to an exemplary embodiment;

fig. 3 is a schematic structural view illustrating a battery module according to an exemplary embodiment at another viewing angle;

fig. 4 isbase:Sub>A sectional view ofbase:Sub>A battery module according to an exemplary embodiment, taken along the directionbase:Sub>A-base:Sub>A in fig. 3;

fig. 5 is an enlarged view at I of a battery module shown in fig. 4;

fig. 6 isbase:Sub>A sectional view ofbase:Sub>A battery module according to an exemplary embodiment, taken along the directionbase:Sub>A-base:Sub>A in fig. 3;

fig. 7 is an enlarged view at II of a battery module shown in fig. 6;

FIG. 8 is a schematic diagram illustrating the construction of a cap according to an exemplary embodiment;

fig. 9 is a schematic diagram illustrating a cap in another perspective view according to an exemplary embodiment.

Wherein the reference numerals are as follows:

100, a battery module;

10, a battery cell;

11, pole column; 12, a first connection portion; 13, a groove;

121, a top surface; 122, a side surface;

20, a cap;

21, a second connecting portion; 22, a connecting plate; 23, a through hole;

211, sidewalls; 212, a bottom wall; 213, notches.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments 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, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

In the related art, the connection between the battery cell and the aluminum bar is realized by welding, and the contact area between the battery cell and the aluminum bar is limited, so that the overcurrent capacity of the connection position of the battery cell and the aluminum bar is limited.

The embodiment of the present application provides a battery module 100.

As shown in fig. 1, the battery module 100 includes a battery cell 10 and a cap 20, the cap 20 is engaged with at least two battery cells 10, the cap 20 has a conductive property, and current conduction between adjacent battery cells 10 can be achieved through the cap 20.

As shown in fig. 2 to 7, in the embodiment of the present application, the battery cell 10 includes the electrode post 11, and the electrode post 11 is provided with the first connection portion 12. The cap 20 is provided with at least two second connection portions 21, the at least two second connection portions 21 are respectively matched with the first connection portions 12 of the at least two single batteries 10, and the at least two single batteries 10 may be adjacently disposed or disposed at an interval, which is not limited herein. The first connecting portion 12 has a conductive surface, the first connecting portion 12 and the second connecting portion 21 are electrically connected through the conductive surface, the entire surface of the conductive surface has overcurrent capacity, and the area of the conductive surface is larger than the cross-sectional area of the pole 11.

In the embodiment of the present application, the first connection portion 12 is disposed on the pole 11, and the conductive surface is disposed on the first connection portion 12, so that the electrical connection relationship between the first connection portion 12 and the second connection portion 21 is realized through the conductive surface. The area of the conductive surface is designed to be larger than the cross-sectional area of the pole 11, so that the overcurrent capacity of the matched part of the first connecting part 12 and the second connecting part 21 is enhanced. The area of the conductive surface is larger than the cross-sectional area of the pole 11, and the conductive surface may include at least one surface, and the sum of the surfaces is larger than the cross-sectional area of the pole 11. For example, the top surface 121 and the side surface 122 of the first connection portion 12 are both conductive surfaces, and the sum of the areas of the two is larger than the cross-sectional area of the pole 11. For another example, the side surface 122 of the first connection portion 12 is a conductive surface, and the area of the side surface 122 of the first connection portion 12 is larger than the cross-sectional area of the terminal 11.

In the related art, the battery cell 10 includes a terminal 11, a housing and a cover plate, the housing is provided with an opening, the terminal 11 extends out of the housing from the opening, and the cover plate is provided at the opening to prevent the electrolyte from flowing out of the opening. Wherein, there may be differences in the cross-sectional areas of different positions of the pole 11, and the cross-sectional area of the pole 11 herein refers to: the cross-sectional area of the portion where the post 11 is fitted with the cap 20 or the first connecting portion 12.

The first connecting portion 12 may be an integral part of the pole 11, or may be a structure disposed on the pole 11 in a fitting manner. The second connecting portion 21 may be formed integrally with the cap 20, or may be formed on the cap 20 by assembling, welding, or the like.

In the embodiment of the present application, the conductive surface may be one surface or a plurality of surfaces, and the conductive surface may be a plane or a curved surface, or a combination of a plane and a curved surface. The conductive surface can be formed on any surface of the first connection portion 12, the area of the conductive surface is larger than the cross-sectional area of the pole 11, and the sum of the areas of all the conductive surfaces is larger than the cross-sectional area of the pole 11.

In the present embodiment, the first connection portion 12 and the second connection portion 21 are tightly connected by an adhesive having conductivity. In which an adhesive may be coated on the conductive surface, the first connection portion 12 and the second connection portion 21 are connected by the adhesive, and the first connection portion 12 and the second connection portion 21 are electrically connected by the conductive surface. The problem of adopt the mode of welding only to have a plurality of contact points, the ability is restricted is flowed in the water conservancy is solved.

In some embodiments, the top surface 121 of the first connecting portion 12 is formed with a groove 13, and the groove 13 is filled with the adhesive. The groove 13 is formed in the top surface 121 of the first connecting portion 12, so that the adhesive can be filled, the dosage of the adhesive can be increased, and the stability of connection between the first connecting portion 12 and the second connecting portion 21 can be enhanced. The groove 13 may be a cylindrical groove, a U-shaped groove, or a groove 13 with other shapes, which can be used for filling the adhesive, but it is understood that the grooves 13 with different shapes may have different stability and overcurrent capacity.

In the specific embodiment, the groove 13 is a cylindrical groove, the diameter of the groove 13 is 3-6 mm, and the depth of the groove 13 is 0.5-2 mm. When the groove 13 adopts the specifications of 3-6 mm in diameter and 0.5-2 mm in depth, the stability of the joint of the first connecting part 12 and the second connecting part 21 is good and the overcurrent capacity is good. If the diameter of the groove 13 is greater than 6mm and the depth is greater than 2mm, the diameter of the groove 13 is greater than about one third of the diameter of the electrode post 11, and the overcurrent capacity between the first connection portion 12 and the second connection portion 21 is affected due to the low conductivity of the adhesive.

In some embodiments, the second connecting portion 21 has a through hole 23, and the through hole 23 is used for injecting an adhesive. If be equipped with recess 13 on utmost point post 11, can with the through-hole 23 position setting that corresponds recess 13, through-hole 23 and recess 13 intercommunication can be convenient for pour into the adhesive into in the recess 13 through-hole 23. It is understood that if the first connection portion 12 is not provided with the recess 13, the second connection portion 21 may be provided with a through hole 23 for injecting an adhesive into a gap between the first connection portion 12 and the second connection portion 21 to increase the area of the conductive surface. Through set up through-hole 23 on second connecting portion 21 for pour into the adhesive into, can pour into the adhesive into after first connecting portion 12 and the cooperation of second connecting portion 21, can adapt to dry fast adhesive, the glue filling and the injecting glue of also being convenient for after the cooperation, the two adhesion is better.

In the embodiment, the first connecting portion 12 is located at the top of the terminal 11, and the groove 13 is formed in the middle of the top surface 121 of the first connecting portion 12, so that the poor stability of the connection stress point between the first connecting portion 12 and the second connecting portion 21 biased to one side is avoided.

In the embodiment of the present application, the first connection portion 12 has a top surface 121 and a side surface 122, and at least one of the top surface 121 and the side surface 122 is a conductive surface. The first connecting portion 12 may be an integral part of the pole 11, and the first connecting portion 12 may be a cylinder, which is more favorable for obtaining a conductive surface with a larger area. At least one of the top surface 121 and the side surface 122 is used as a conductive surface, so that the area of the conductive surface is easily increased, and better overcurrent capacity is obtained.

The first connecting portion 12 may be a cylinder, a square column or other structures, and may be engaged with the second connecting structure by sleeving or embedding. The top surface 121 of the first connection portion 12 may be a flat surface or a curved surface, and likewise, the side surface 122 of the first connection portion 12 may be a flat surface or a curved surface. When the top surface 121 of the first connection portion 12 is a curved surface, even if only the top surface 121 of the first connection portion 12 is a conductive surface, the area of the conductive surface is larger than the cross-sectional area of the post 11.

In an embodiment, the first connection portion 12 is a cylinder integrally formed on the top of the pole 11, and the side surface 122 of the first connection portion 12 is a conductive surface. The second connecting portion 21 is disposed on the first connecting portion 12 and electrically connected to the side surface 122 of the first connecting portion 12. The second connecting portion 21 is connected to the first connecting portion 12 by sleeving, so that the assembly is convenient and fast, and the purpose of increasing the flow area can be achieved.

As shown in fig. 8 to 9, in the present embodiment, the cap 20 includes a connecting plate 22 and two second connecting portions 21, and the two second connecting portions 21 are respectively provided at both end portions of the connecting plate 22. The second connection portions 21 are respectively disposed at two ends of the connection plate 22, so that the two single batteries 10 can be connected in series or in parallel. The second connecting portion 21 is provided at the end of the connecting plate 22, reducing the body length of the connecting plate 22.

It is to be understood that the number of the second connection portions 21 included in each cap 20 may be three, four, five, and the like, and the plurality of second connection portions 21 are arranged at intervals along the same direction, which may be specifically set according to the relative positions of the poles 11 in the plurality of single batteries 10. A plurality of second connection portions 21 may be disposed at intervals on one connection plate 22, or a plurality of connection plates 22 may be used to connect a plurality of second connection portions 21.

In some embodiments, the second connecting portion 21 includes a side wall 211 having a cylindrical shape, and the side wall 211 of the second connecting portion 21 is tightly fitted to the side surface 122 of the first connecting portion 12. The side wall 211 is electrically connected with the conductive surface, so that the overcurrent capacity is good, and the assembly is convenient. It will be appreciated that the cylindrical side wall 211, the cross-section of which may be circular, square or of another shape, needs to be able to adapt to the part of the first connection portion 12 to which it is assembled.

In the embodiment, the cross-sectional shape of the sidewall 211 is circular, and the first connecting portion 12 is a cylinder. The battery unit 10 has strong adaptability to different position relations and is convenient and fast to assemble. And the area of the conductive surface is large, so that the overcurrent capacity can be improved. Wherein, the external diameter of circular lateral wall 211 is greater than the width of connecting plate 22, and the size of control connecting plate 22 is favorable to the realization of the light demand of battery module 100.

In some embodiments, the second connection portion 21 further includes a bottom wall 212 formed at the bottom of the side wall 211, the top surface 121 and the side surface 122 of the first connection portion 12 are both conductive surfaces, and the top surface 121 and the side surface 122 of the first connection portion 12 are in contact with the side wall 211 and the bottom wall 212 of the second connection portion 21, respectively. The top surface 121 and the top surface 122 of the first connecting portion 12 both form a conductive surface, so that the contact area between the pole 11 and the cap 20 is greatly increased, and the overcurrent capacity is ensured.

In the embodiment of the present application, the side wall 211 is provided with a plurality of notches 213, and the notches 213 are formed in the side wall 211, so that the side wall 211 has certain elasticity, the first connecting portion 12 can conveniently extend into the second connecting portion 21, and the second connecting portion 21 can better form a close fit with the first connecting portion 12. If a plurality of notches 213 are formed, the plurality of notches 213 may be equally spaced along the circumference of the sidewall 211 so that the elastic capacity of the second connection part 21 is uniformly configured.

The shape of the notch 213 may be a U-shaped, V-shaped or T-shaped notch, and the notch 213 mainly functions to provide a certain elasticity to the sidewall 211, so the shape of the notch 213 is not limited in the embodiments of the present application.

The embodiment of the present application further provides a battery pack, which includes at least one battery module 100 of the above embodiments, and the battery pack can be used alone with one battery module 100, or a plurality of battery modules 100 can be assembled to form a battery pack for use. So, the battery package is through adopting foretell battery module 100, and first connecting portion 12 and second connecting portion 21 form the electricity through the conducting surface among the above-mentioned battery module 100 and connect, and the area of conducting surface is greater than the cross-sectional area of utmost point post 11, has increased the area of overflowing between the battery monomer 10, improves the ability of overflowing between the battery monomer 10.

The embodiment of the application further provides an electric device which comprises the battery pack. The electric equipment can be energy storage equipment, vehicles, electric appliances and the like. The electric equipment has the advantage of strong overcurrent capacity by adopting the battery pack.

In the application examples, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mating," "connecting," "engaging," and the like are to be construed broadly and include, for example, "connecting" that may be a fixed connection, a removable connection, or an integral connection. The specific meanings of the above terms in the examples of the application can be understood by those skilled in the art according to specific situations.

In the description of the embodiments of the application, it is to be understood that the terms "top surface", "end portion", "top portion", and the like refer to orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are only for convenience in describing the embodiments of the application and for simplicity in description, and do not indicate or imply that the devices or units referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the embodiments of the application.

In the description herein, the description of the terms "some embodiments," "a specific embodiment," etc. means 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 embodiments of the application. In this specification, the schematic representations of the terms used above do not necessarily 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.

The above description is only a preferred embodiment of the application example, and is not intended to limit the application example, and various modifications and changes may be made to the application example by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the applied embodiment shall be included in the protection scope of the applied embodiment.

Claims

1. A battery module, comprising:

the battery pack comprises a battery single body (10), wherein the battery single body (10) comprises a pole post (11), the pole post (11) is provided with a first connecting part (12), and the first connecting part (12) is provided with a conductive surface;

the cover cap (20), the cover cap (20) is provided with at least two second connecting parts (21), and the at least two second connecting parts (21) are respectively matched with the first connecting parts (12) of the at least two single batteries (10);

the first connecting portion (12) and the second connecting portion (21) are electrically connected through the conductive surface, the whole surface of the conductive surface has overcurrent capacity, and the area of the conductive surface is larger than the cross-sectional area of the pole (11).

2. The battery module according to claim 1, wherein the first connection part (12) and the second connection part (21) are tightly connected by an adhesive having conductivity.

3. The battery module according to claim 2, wherein the top surface (121) of the first connecting portion (12) is formed with a groove (13), and the groove (13) is filled with the adhesive.

4. The battery module according to claim 3, wherein the grooves (13) are cylindrical grooves, the diameter of the grooves (13) is 3 to 6mm, and the depth of the grooves (13) is 0.5 to 2mm.

5. The battery module according to claim 2, wherein the second connecting portion (21) is formed with a through-hole (23), and the through-hole (23) is used for injecting an adhesive.

6. The battery module according to claim 1, wherein the first connection part (12) has a top surface (121) and a side surface (122), and at least one of the top surface (121) and the side surface (122) is a conductive surface.

7. The battery module according to claim 6, wherein the side surface (122) of the first connecting portion (12) is a conductive surface, and the second connecting portion (21) is fitted over the first connecting portion (12) and electrically connected to the side surface (122) of the first connecting portion (12).

8. The battery module according to claim 6, wherein the cap (20) includes a connecting plate (22) and two second connecting portions (21), and the two second connecting portions (21) are provided at both ends of the connecting plate (22), respectively.

9. The battery module according to claim 8, wherein the second connecting portion (21) includes a side wall (211) having a cylindrical shape, and the side wall (211) of the second connecting portion (21) is closely fitted to the side surface (122) of the first connecting portion (12).

10. The battery module according to claim 9, wherein the second connection part (21) further comprises a bottom wall (212) formed at the bottom of the side wall (211), the top surface (121) and the side surface (122) of the first connection part (12) are both conductive surfaces, and the top surface (121) and the side surface (122) of the first connection part (12) are in contact with the side wall (211) and the bottom wall (212) of the second connection part (21), respectively.

11. The battery module according to claim 9, wherein the side wall (211) of the second connection part (21) has a circular cross-section, and the diameter of the cross-section of the side wall (211) is greater than the width of the connection plate (22).

12. The battery module according to claim 9, wherein the side wall (211) is formed with a plurality of notches (213).

13. A battery pack comprising the battery module according to any one of claims 1 to 12.

14. An electric device comprising the battery pack according to claim 13.