CN219917297U - Secondary battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a secondary battery. The secondary battery includes a case, a cold water pipe, and at least one battery; wherein the battery is a soft package battery, and all the batteries are accommodated in the shell; the battery can generate heat in the working process, so that a cold water pipeline is arranged in the shell to radiate the battery, when the cold water pipeline is arranged, the part of the cold water pipeline in the shell and at least one side of each battery are propped against the cold water pipeline, and the cold water pipeline is communicated with an external pipeline through a water inlet and a water outlet which are arranged in the shell, so that the cold water pipeline can be propped against at least one side of the battery, and further the heat radiation effect on the battery can be achieved rapidly; therefore, the secondary battery can improve the heat dissipation efficiency, balance the internal temperature, avoid the condition of abnormal internal temperature or local high temperature, and maintain the wettability of the battery.

Description

Secondary battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a secondary battery.

Background

The existing battery has the problems that the temperature abnormality or local high temperature occurs in the battery due to the heat dissipation problem.

Disclosure of Invention

The object of the present utility model includes, for example, providing a secondary battery capable of improving the efficiency of heat dissipation, equalizing the temperature of the inside, and avoiding the occurrence of abnormal temperature or local high temperature in the inside.

Embodiments of the utility model may be implemented as follows:

the utility model provides a secondary battery, which comprises a shell, a cold water pipeline and at least one battery;

the cold water pipeline and at least one battery are accommodated in the shell, and at least one side of each battery is propped against the cold water pipeline; the shell is provided with a water inlet and a water outlet which are respectively communicated with the water inlet end and the water outlet end of the cold water pipeline;

wherein, the battery is a soft package battery.

In alternative embodiments, the cold water conduit is located between two cells, or the cold water conduit is located on the same side of both cells.

In an alternative embodiment, each cell comprises two oppositely disposed large faces, two oppositely disposed bottom faces and two oppositely disposed top faces, the cold water pipe being in abutment with at least one large face, at least one bottom face and at least one top face.

In an alternative embodiment, a transitional cambered surface is arranged at the joint of the large surface and the bottom surface, at the joint of the top surface and the large surface and at the joint of the bottom surface and the top surface;

or, the secondary battery further comprises a plurality of corner soft strips, and the corner soft strips are covered at the joint of the large surface and the bottom surface, the joint of the top surface and the large surface and the joint of the bottom surface and the top surface.

In an alternative embodiment, the secondary battery further includes a cap plate and a fixing plate;

at least one end of the shell is provided with an opening, and the cover plate covers the opening; the fixed plate is fixedly connected with one or two of the cover plate and the shell;

wherein, cold water pipeline and all batteries are all connected with the fixed plate.

In an alternative embodiment, the fixing plate is fixedly connected with the cover plate and the shell; the fixed plate comprises a first connecting part and a second connecting part, wherein the first connecting part is connected with the shell, and the second connecting part is connected with the cover plate.

In an alternative embodiment, each battery comprises two pouch cells; along the thickness direction of the fixed plate, two soft package batteries are distributed on two sides of the fixed plate, and at least one side surface of each soft package battery is attached to the fixed plate.

In an alternative embodiment, the cold water pipe comprises two sub-pipes; along the thickness direction of the fixed plate, two sub-pipelines are distributed on two sides of the thickness direction of the fixed plate and are abutted with the soft package battery; the shell is provided with two water inlets and two water outlets, the two water inlets are respectively communicated with the water inlet ends of the two sub-pipelines, and the two water outlets are respectively communicated with the water outlet ends of the two sub-pipelines.

In an alternative embodiment, injection molding through holes are formed in two opposite sides of the fixing plate, and the injection molding through holes are avoided from the cold water pipeline; the secondary battery further includes an injection molding member which is coated on the outer circumference of the battery in the thickness direction of the fixing plate and passes through the injection molding through hole.

In an alternative embodiment, the secondary battery further includes a cap plate; at least one end of the shell is provided with an opening, and the cover plate covers the opening;

the cold water pipeline is fixedly connected with the cover plate and the shell; all the batteries are connected with the cold water pipeline;

the cold water pipeline is plate-shaped, is arranged between the two large surfaces, and the soft package battery is fixedly connected with the cold water pipeline through the binding piece; the cold water pipeline comprises a third connecting part and a fourth connecting part, the third connecting part is connected with the shell, and the fourth connecting part is connected with the cover plate.

The beneficial effects of the embodiment of the utility model include:

the secondary battery includes a case, a cold water pipe, and at least one battery; wherein each battery comprises at least one soft package battery, and all batteries are accommodated in the shell; the battery can generate heat in the working process, so that a cold water pipeline is arranged in the shell to radiate the battery, when the cold water pipeline is arranged, the part of the cold water pipeline in the shell and at least one side of each battery are propped against the cold water pipeline, and the cold water pipeline is communicated with an external pipeline through a water inlet and a water outlet which are arranged in the shell, so that a radiating circulation loop is formed, and therefore, the cold water pipeline can be propped against at least one side of the battery through the arrangement mode, and further, the battery can be rapidly radiated; therefore, the secondary battery can improve the heat dissipation efficiency, balance the internal temperature, avoid the condition of abnormal internal temperature or local high temperature, and package the bare cell in the existing shell into a soft-packaged battery in a soft-packaged mode so as to ensure the wettability of the battery.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, 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 utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a structure of a secondary battery according to an embodiment of the present utility model;

fig. 2 is a partial sectional view of a secondary battery according to an embodiment of the present utility model;

FIG. 3 is a schematic view illustrating installation of a cold water pipe in an embodiment of the present utility model;

FIG. 4 is a schematic view of an installation of a cold water pipe in other embodiments of the present utility model;

FIG. 5 is a partial schematic view of FIG. 3 at A;

FIG. 6 is a schematic view illustrating a first view of a fixing plate according to another embodiment of the present utility model;

fig. 7 is a schematic structural view of a second view of a fixing plate according to another embodiment of the present utility model.

Icon: 100-a secondary battery; 110-a housing; 120-a cold water pipeline; 130-battery; 111-water inlet; 112-water outlet; 131-soft package battery; 132-large surface; 133-bottom surface; 134-top surface; 140-cover plate; 150-fixing plates; 113-opening; 151-first connection; 152-a second connection; 121-subducting; 153-injection molding through holes; 122-a third connection; 123-fourth connection; 124-binding holes.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

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 utility model, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

Referring to fig. 1-3, the present embodiment provides a secondary battery 100, the secondary battery 100 including a housing 110, a cold water pipe 120, and at least one battery 130;

the cold water pipeline 120 and at least one battery 130 are accommodated in the shell 110, and at least one side of each battery 130 is propped against the cold water pipeline 120; the shell 110 is provided with a water inlet 111 and a water outlet 112, and the water inlet 111 and the water outlet 112 are respectively communicated with the water inlet end and the water outlet end of the cold water pipeline 120;

wherein, the battery 130 is a soft package battery 131.

Referring to fig. 1 to 3, the secondary battery 100 operates according to the following principle:

the secondary battery 100 includes a case 110, a cold water pipe 120, and at least one battery 130; wherein each battery 130 comprises at least one soft pack battery 131, and all batteries 130 are accommodated in the housing 110; the battery 130 generates heat during operation, and thus, a cold water pipe 120 is provided in the housing 110 to radiate heat from the battery 130;

and when setting up cold water pipe 120, adopt cold water pipe 120 be located the part of casing 110 and at least one side of every battery 130 all support with cold water pipe 120 to through setting up the water inlet 111 and the delivery port 112 and the outside pipeline intercommunication of casing 110, thereby form the heat dissipation mode of heat dissipation circulation loop, such heat dissipation mode can effectively dispel the heat to each battery 130, thereby balanced inside temperature, and improve radiating efficiency, in order to avoid inside temperature anomaly or the circumstances of local high temperature to keep the wettability of battery 130.

The reason why the secondary battery 100 can secure wettability of the battery 130 is as follows:

the existing battery adopts a mode of combining a bare cell and a metal shell, the shell is generally positively charged, in order to prevent the shell from being in collision with a negative electrode in the cell, an insulating layer is sleeved outside the cell, and considering that a round angle is formed at the bottom of the shell by stamping the metal shell to damage the cell, a bottom insulating support piece is arranged at the bottom of the cell so as to lift the cell to the upper part of the round angle, so that the cell is prevented from being damaged by the round angle, but electrolyte can flow between the insulating support piece and the bottom of the shell under the influence of gravity at the moment, so that the bottom of the cell cannot contact the electrolyte, and the membrane cannot exert capillary action for absorbing the electrolyte; in this embodiment, the aluminum plastic film is not formed by stamping, and no rounding is present, so that the phenomenon that the battery cell cannot absorb the bottom electrolyte due to the insulating support member is avoided, and thus the wettability of the bare battery cell in the battery 130 can be ensured.

Further, referring to fig. 1-3, in the present embodiment, when the cold water pipe 120 is configured, in order to enable the cold water pipe 120 to perform a heat dissipation function on each of the batteries 130 in the housing 110, the cold water pipe 120 may be located between the two batteries 130 or the cold water pipe 120 may be located on the same side of the two batteries 130. Note that, since each of the batteries 130 includes at least one soft pack battery 131, when the cold water pipe 120 is provided, in order to enable the cooling water pipe 120 to perform a heat dissipation function on each of the soft pack batteries 131, in other embodiments of the present utility model, a manner of disposing the cold water pipe 120 on each of a plurality of sides of the battery 130 may be adopted.

Referring to fig. 4 in conjunction with fig. 1 to 3, in other embodiments of the present utility model, when the batteries 130 are disposed, the batteries 130 are disposed in a hexahedral manner, so each of the batteries 130 includes two large faces 132 disposed opposite to each other, two bottom faces 133 disposed opposite to each other, and two top faces 134 disposed opposite to each other, and therefore, when the cold water pipes 120 are disposed on multiple sides of the batteries 130, the cold water pipes 120 can be abutted against at least one large face 132, at least one bottom face 133, and at least one top face 134, so that at least three sides of the batteries 130 can dissipate heat under the effect of the cold water pipes 120, thereby improving heat dissipation efficiency.

Based on the above-mentioned structural arrangement, in order to prevent the corner of the battery from damaging the housing 110 or the adjacent battery 130 when the battery 130 is arranged, in this embodiment, the connection between the large surface 132 and the bottom surface 133, the connection between the top surface 134 and the large surface 132, and the connection between the bottom surface 133 and the top surface 134 are all provided with transitional cambered surfaces, so that the battery 130 and the housing 110 can be protected by the arrangement of the transitional cambered surfaces; in addition, the secondary battery 100 may further include a plurality of corner soft strips, and the corner soft strips are covered at the connection between the large surface 132 and the bottom surface 133, the connection between the top surface 134 and the large surface 132, and the connection between the bottom surface 133 and the top surface 134, so that the battery 130 and the case 110 may be protected by the corner soft strips.

Further, referring to fig. 1 to 5, in the present embodiment, when the secondary battery 100 is provided, the secondary battery 100 further includes a cap plate 140 and a fixing plate 150; at least one end of the housing 110 is provided with an opening 113, and the cover plate 140 covers the opening 113; the fixing plate 150 is fixedly connected with one or both of the cover plate 140 and the housing 110; wherein the cold water pipe 120 and all the batteries 130 are connected to the fixing plate 150.

In addition, in order to improve the mounting stability of the fixing plate 150, the fixing plate 150 is connected to the housing 110 and the cover plate 140, so that the fixing plate 150 includes a first connection portion 151 and a second connection portion 152, the first connection portion 151 is connected to the housing 110, and the second connection portion 152 is connected to the cover plate 140, in order to facilitate the connection of the fixing plate 150 to the housing 110 and the cover plate 140.

Further, referring to fig. 1-3, in the present embodiment, a mode is adopted in which each battery 130 includes two soft package batteries 131; and along the thickness direction of the fixing plate 150, two soft pack batteries 131 are distributed on two sides of the fixing plate 150, and at least one side surface of each soft pack battery 131 is attached to the fixing plate 150, so that each soft pack battery 131 is connected with the fixing plate 150 in such a manner, and the stability of connection is improved through the arrangement of the fixing plate 150. On this basis, when the cold water pipe 120 is configured, the cold water pipe 120 may include two sub-pipes 121; along the thickness direction of the fixing plate 150, the two sub-pipes 121 are distributed on two sides of the fixing plate 150 and are abutted against the soft pack batteries 131 on the same side. In order to facilitate the communication between the cold water pipe 120 and the external pipe, the casing 110 is provided with two water inlets 111 and two water outlets 112, the two water inlets 111 are respectively communicated with the water inlet ends of the two sub-pipes 121, and the two water outlets 112 are respectively communicated with the water outlet ends of the two sub-pipes 121.

In summary, based on the above-mentioned structural arrangement, please refer to fig. 1-5, in order to improve the connection stability between the fixing plate 150 and the battery 130, injection molding through holes 153 are disposed on two opposite sides of the fixing plate 150, and the injection molding through holes 153 are avoided from the cold water pipeline 120; and the secondary battery 100 further includes an injection molding member that is coated on the outer circumference of the battery 130 in the thickness direction of the fixing plate 150 and passes through the injection molding through-hole 153. Through the setting of injection molding, can improve battery 130's connection stability, simultaneously, because the injection molding passes through injection molding through-hole 153 and binds the electric core at fixed plate 150 thickness direction both ends to can make the length of secondary cell 100 diminish, increase battery 130's space utilization in the module.

In summary, based on the above-mentioned structural arrangement, in other embodiments of the present utility model, when the cold water pipe 120 is arranged, the cold water pipe 120 may be configured in a plate-shaped structure, so as to have the supporting function of the fixing plate 150 as described above, concretely, please refer to fig. 6 and 7, and combine fig. 1-5, the secondary battery 100 includes the cover plate 140, at least one end of the housing 110 is provided with the opening 113, and the cover plate 140 covers the opening 113; based on the above structure, the cold water pipe 120 is fixedly connected with the cover plate 140 and the housing 110, and all the batteries 130 are connected with the cold water pipe 120, so that the plate-shaped cold water pipe 120 can play a role in heat dissipation and also can play a role in fixing and supporting all the batteries 130;

when the plate-shaped cold water pipe 120 is installed, the plate-shaped cold water pipe 120 can be arranged between the two large surfaces 132, so that the contact area between the cold water pipe 120 and the battery 130 can be increased in such a way, and the heat dissipation efficiency and the support stability are further improved; in order to facilitate the fixed connection between the cold water pipe 120 and the cover 140 and between the cold water pipe 120 and the housing 110, the cold water pipe 120 includes a third connecting portion 122 and a fourth connecting portion 123, wherein the third connecting portion 122 is connected to the housing 110, and the fourth connecting portion 123 is connected to the cover 140. In order to improve the connection stability between the plate-shaped cold water pipeline 120 and the battery 130, binding holes 124 are formed on two opposite sides of the cold water pipeline 120, and the binding holes 124 and the cold water pipeline 120 are used for avoiding the area attached to the battery; and the secondary battery 100 further includes a binding member, through which all the pouch batteries 131 are fixedly connected with the cold water pipe 120.

The present utility model is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A secondary battery characterized in that:

the secondary battery (100) includes a case (110), a cold water pipe (120), and at least one battery (130);

the cold water pipeline (120) and at least one battery (130) are accommodated in the shell (110), and at least one side of each battery (130) is abutted against the cold water pipeline (120); the shell (110) is provided with a water inlet (111) and a water outlet (112), and the water inlet (111) and the water outlet (112) are respectively communicated with the water inlet end and the water outlet end of the cold water pipeline (120);

wherein the battery (130) is a soft pack battery (131).

2. The secondary battery according to claim 1, wherein:

the cold water pipe (120) is located between the two batteries (130), or the cold water pipe (120) is located at the same side of the two batteries (130).

3. The secondary battery according to claim 2, wherein:

each battery (130) comprises two large faces (132) which are oppositely arranged, two bottom faces (133) which are oppositely arranged and two top faces (134) which are oppositely arranged, and the cold water pipeline (120) is propped against at least one large face (132), at least one bottom face (133) and at least one top face (134).

4. The secondary battery according to claim 3, wherein:

a transitional cambered surface is arranged at the joint of the large surface (132) and the bottom surface (133), at the joint of the top surface (134) and the large surface (132) and at the joint of the bottom surface (133) and the top surface (134);

or, the secondary battery (100) further comprises a plurality of corner soft strips, and the corner soft strips are covered at the connection part of the large surface (132) and the bottom surface (133), the connection part of the top surface (134) and the large surface (132) and the connection part of the bottom surface (133) and the top surface (134).

5. The secondary battery according to any one of claims 1 to 4, wherein:

the secondary battery (100) further includes a cap plate (140) and a fixing plate (150);

at least one end of the shell (110) is provided with an opening (113), and the cover plate (140) covers the opening (113); the fixed plate (150) is fixedly connected with one or two of the cover plate (140) and the shell (110);

wherein the cold water pipe (120) and all the batteries (130) are connected with the fixing plate (150).

6. The secondary battery according to claim 5, wherein:

the fixed plate (150) is fixedly connected with the cover plate (140) and the shell (110); the fixing plate (150) comprises a first connecting portion (151) and a second connecting portion (152), the first connecting portion (151) is connected with the shell (110), and the second connecting portion (152) is connected with the cover plate (140).

7. The secondary battery according to claim 5, wherein:

-each of said batteries (130) comprises two of said pouch batteries (131); along the thickness direction of the fixing plate (150), two soft package batteries (131) are distributed on two sides of the fixing plate (150), and at least one side surface of each soft package battery (131) is attached to the fixing plate (150).

8. The secondary battery according to claim 5, wherein:

-the cold water pipe (120) comprises two sub-pipes (121); along the thickness direction of the fixing plate (150), two sub-pipelines (121) are distributed on two sides of the thickness direction of the fixing plate (150) and are abutted against the soft package battery (131);

the shell (110) is provided with two water inlets (111) and two water outlets (112), the two water inlets (111) are respectively communicated with the water inlet ends of the two sub-pipelines (121), and the two water outlets (112) are respectively communicated with the water outlet ends of the two sub-pipelines (121).

9. The secondary battery according to claim 5, wherein:

injection through holes (153) are formed in two opposite sides of the fixing plate (150), and the injection through holes (153) are away from the cold water pipeline (120); the secondary battery (100) further includes an injection molded member that covers the outer circumference of the battery (130) in the thickness direction of the fixing plate (150) and passes through the injection molded through hole (153).

10. The secondary battery according to any one of claims 1 to 4, wherein:

the secondary battery (100) further includes a cap plate (140); at least one end of the shell (110) is provided with an opening (113), and the cover plate (140) covers the opening (113);

the cold water pipeline (120) is fixedly connected with the cover plate (140) and the shell (110); all of the cells (130) are connected to the cold water pipe (120);

the cold water pipeline (120) is plate-shaped and is arranged between two large faces (132), and the soft package battery (131) is fixedly connected with the cold water pipeline (120) through a binding piece; the cold water pipeline (120) comprises a third connecting portion (122) and a fourth connecting portion (123), the third connecting portion (122) is connected with the shell (110), and the fourth connecting portion (123) is connected with the cover plate (140).