TWM634304U - Conductive frame of batteries - Google Patents

Abstract

The present invention provides a battery conductive frame, which includes a conductive sheet, a plurality of first protruding welding parts and a fixing unit. The first protruding welding part is arranged on the first surface of the conductive sheet, and the conductive sheet is connected to the battery core through the first protruding welding part. The fixing unit includes a fixing part and a pressing part, wherein the fixing part is used to connect the battery core, and the pressing part is used to press the second surface of the conductive sheet to improve the connection strength between the conductive sheet and the battery core, And avoid the separation of the conductive sheet from the battery core.

Description

battery conductive frame

The present invention provides a battery conductive frame for connecting battery cores, which can improve the connection strength with the battery cores and prevent the battery conductive frame from being separated from the battery cores.

Secondary batteries mainly include nickel-metal hydride batteries, nickel-cadmium batteries, lithium-ion batteries, and lithium-polymer batteries. Lithium batteries have high energy density, high operating voltage, wide operating temperature range, no memory effect, long life, and can be recharged many times. Discharge and other advantages, and are widely used in portable electronic products such as mobile phones, notebook computers, digital cameras, etc., and in recent years have expanded to the automotive field.

The structure of the battery core (Cell) mainly includes positive electrode material, electrolyte, negative electrode material, separator and casing, in which the separator separates the positive electrode material and the negative electrode material to avoid short circuit, and the electrolyte is placed on the porous separator , and works as a conduction of ionic charges. The shell is used to cover the above-mentioned positive electrode material, separator, electrolyte and negative electrode material. Generally speaking, the shell is usually made of metal material.

When in use, a plurality of battery cells are connected in series and/or in parallel through the battery conductive frame to form a battery pack, so that the battery pack can output the voltage required by the product. Generally speaking, the battery conductive frame and the battery core are connected by electric welding. During the electric welding process, the temperature of the battery conductive frame and the battery core needs to be increased, and the battery conductive frame is applied to the positive and/or negative shell of the battery core. Press to complete the connection between the battery conductive frame and the battery core. However, in the process of welding or using the battery pack, the battery conductive frame and the battery core may be loosened due to external force, and the battery pack cannot be used normally.

An object of the present invention is to provide a battery conductive frame, which mainly includes a conductive sheet and a fixing unit, wherein the conductive sheet is welded to the battery core through at least one first protruding welding portion, and is used to connect a plurality of battery cells in series or in parallel. The fixing unit can also be connected to the battery core by welding, and contact and press part or all of the conductive sheets to strengthen the connection strength between the conductive sheet and the battery core. Through the setting of the battery conductive frame described in the present invention, it can effectively prevent the battery conductive frame from being loosened from the battery core due to the action of external force during the process of making or using the battery pack, and can effectively improve the reliability of the product. Spend.

In order to achieve the above-mentioned purpose, the present invention proposes a battery conductive frame, including: a conductive sheet, including a first surface and a second surface, wherein the first surface and the second surface are two surfaces facing each other; The first protruding welding part is arranged on the first surface of the conductive sheet and is used to connect a plurality of battery cells; and a fixing unit includes a fixing part and at least one pressing part, wherein the fixing part is used to connect the battery cores, and The pressing portion is used for pressing the conductive sheet.

In at least one embodiment of the present invention, the pressing portion of the fixing unit overlaps with the first protruding welding portion of the conductive sheet.

In at least one embodiment of the present invention, at least one second protruding welding part is located at the pressing part of the fixing unit, and the pressing part of the fixing unit is connected to the second surface of the conductive sheet through the second protruding welding part.

In at least one embodiment of the present invention, at least one third protruding welding part is located at the fixing part of the fixing unit, and the fixing part of the fixing unit is connected to the battery core through the third protruding welding part.

In at least one embodiment of the present invention, the fixing unit includes two fixing parts, which are respectively connected to different battery cells.

In at least one embodiment of the present invention, there are a plurality of fixing units, which are respectively connected to a plurality of battery cells.

In at least one embodiment of the present invention, the fixing unit includes two pressing parts, and is connected to the same battery cell through the two pressing parts.

In at least one embodiment of the present invention, the conductive sheet includes a plurality of branches, and the first protruding welding portion is disposed on the branches.

In at least one embodiment of the present invention, the conductivity of the fixing unit is lower than that of the conductive sheet.

In at least one embodiment of the present invention, the thickness of the fixing unit is smaller than that of the conductive sheet.

Please refer to FIG. 1 and FIG. 2 , which are respectively a schematic cross-sectional view and a top perspective view of an embodiment of the battery conductive frame and the battery core of the present invention. The battery conductive frame 10 is mainly used to connect a plurality of battery cells 12 , and includes a conductive sheet 11 and at least one fixing unit 13 , wherein the conductive sheet 11 is used to connect a plurality of battery cells 12 in series or in parallel.

Generally speaking, the conductive sheet 11 is usually made of metal material with low resistance and high conductivity, such as copper, so as to reduce the energy loss caused when the battery core 12 is charged and discharged through the conductive sheet 11 .

In practical applications, the conductive sheet 11 and the casing 121 of the battery core 12 are mainly connected by welding, such as resistance welding. Welding is a technology for joining dissimilar metals by heating or pressing. When the conductivity of the conductive sheet 11 is high, it may be unfavorable to weld the conductive sheet 11 and the battery core 12 through resistance welding.

The conductive sheet 11 includes a first surface 111 and a second surface 113, wherein the first surface 111 and the second surface 113 are two surfaces facing each other on the conductive sheet 11, for example, the first surface 111 is the lower surface, and the second Surface 113 is the upper surface. A plurality of first protruding welding parts 115 are arranged on the first surface 111 of the conductive sheet 11, wherein the first protruding welding parts 115 can be bumps on the first surface 111 of the protruding conductive sheet 11, and are used to connect battery cells 12.

In an embodiment of the present invention, the first protruding welding portion 115 can be formed on the first surface 111 of the conductive sheet 11 by stamping, and at least one concave portion can be formed on the second surface 113 of the conductive sheet 11, wherein The position of the concave portion corresponds to the position of the first protruding welding portion 115 .

Of course, forming the first protruding welding portion 15 on the conductive sheet 11 by stamping is only an embodiment of the present invention, rather than limiting the scope of the present invention. In actual application, the conductive sheet 11 can be manufactured in other ways, for example, the conductive sheet 11 and the first protruding welding portion 115 can be manufactured by casting, wherein there will be no concave portion on the second surface 113 of the conductive sheet 11 .

During the welding process, the first protruding welding portion 115 of the conductive sheet 11 can be connected to the case 121 of the battery core 12 , wherein the case 121 is made of metal, for example, connected to the positive pole or the negative pole of the case 121 . Then, the welding current is sent to the conductive sheet 11 , the first protruding welding portion 115 and the casing 121 of the battery core 12 , so that the temperature of the contacting first protruding welding portion 115 of the conductive sheet 11 and the casing 121 rises.

When the temperature of the conductive sheet 11 , the first protruding welding portion 115 and the casing 121 of the battery core 12 reaches a certain value, they will melt to form a molten pool. Then through the conductive sheet 11 and the first protruding welding portion 115, pressure is applied to the housing 121 of the battery core 12, so that the first protruding welding portion 115 sinks into the housing 121 of the battery core 12, and the conductive sheet 11, the first protruding After the temperature of the welding portion 115 and the casing 121 of the battery core 12 drops, the connection between the conductive sheet 11 and the battery core 12 is completed.

Although the connection between the conductive sheet 11 and the battery core 12 can be completed through the above-mentioned method, since the conductive sheet 11 and the battery core 12 are only connected to the contact point of the battery core 12 through the first protruding welding portion 115, the conductive sheet will The connection relationship between 11 and the battery core 12 is not firm, and may cause the conductive sheet 11 to separate from the battery core 12 during subsequent manufacturing or use.

In practical applications, the conductive sheet 11 is usually connected to a plurality of battery cells 12 in sequence. For example, after one end of the conductive sheet 11 is connected to the battery cell 12 on the left side of FIG. Battery cell 12 on the right.

As in the above-mentioned welding sequence of the conductive sheet 11 and the plurality of battery cells 12 , the conductive sheet 11 usually exerts pressure on the battery cell 12 during the process of connecting the right battery cell 12 . Although the pressure exerted by the conductive sheet 11 on the battery core 12 is generally not too great, the connection between the conductive sheet 11 and the battery core 12 is only the first protruding welding portion 115 and its contact point. In addition, there is a certain distance between the conductive sheet 11 connecting the two battery cells 12, so that the pressure exerted by the conductive sheet 11 on the right battery cell 12 will protrude at the first joint connecting the conductive sheet 11 and the left battery cell 12. The welding portion 115 creates a moment and may cause the conductive sheet 11 to separate from the battery cell 12 on the left.

In order to avoid the above situation, the present invention further provides a fixing unit 13 on the conductive sheet 11 and the battery core 12 . The fixing unit 13 includes a fixing part 131 and a pressing part 133, wherein the fixing part 131 is used to connect the casing 121 of the battery cell 12, and the pressing part 133 is used to contact and press the conductive sheet 11 to increase the conductive sheet 11 and the connection strength between the battery core 12.

In an embodiment of the present invention, the fixing unit 13 can be a metal sheet, wherein the fixing part 131 and the pressing part 133 have different setting heights, for example, the fixing part 131 is connected to the pressing part 133 through a connecting part 132, wherein the fixing part 131 is roughly parallel to the pressing part 133, and there is an included angle greater than 90 degrees between the connecting part 132 and the fixing part 131 and the pressing part 133. In the drawings of the present invention, the included angle is described as 90 degrees, so that the fixing unit 13 The section is stepped.

In addition, the connecting portion 132 of the fixing unit 13 is attached to the side of the conductive sheet 11 in the new drawings, but in different embodiments, there may be a gap between the connecting portion 132 of the fixing unit 13 and the conductive sheet 11 .

In practical application, after the conductive sheet 11 is connected to one of the battery cells 12 , the fixing unit 13 can be provided on the battery cell 12 connected to the conductive sheet 11 to strengthen the connection relationship between the conductive sheet 11 and the battery cells 12 . Then connect the conductive sheet 11 to another or other battery cores 12 to prevent the conductive sheet 11 from being separated from the connected battery core 12 during the process of connecting the conductive sheet 11 to other battery cells 12 .

In the embodiment of the present invention, there are plural fixing units 13 and battery cells 12 , and each fixing unit 13 is connected to each battery cell 12 respectively.

The fixing portion 131 of the fixing unit 13 can be connected to the casing 121 of the battery cell 12 by welding, and the pressing portion 133 of the fixing unit 13 can also be connected to the conductive sheet 11 by welding, such as resistance welding. Therefore, after the welding between the first surface 111 of the conductive sheet 11 and the casing 121 of the battery core 12 is completed through welding equipment, the same welding equipment can be used to weld the fixing unit 13 to the casing 121 of the battery core 12 and the conductive sheet 11. the second surface 113 .

The fixing unit 13 is mainly used for fixing the conductive sheet 11 on the battery core 12 , and is not used for transmitting current. Therefore, the fixing unit 13 can be made of a low-conductivity metal material to facilitate the connection of the fixing unit 13 and the battery core 12 with the conductive sheet 11 through welding. For example, the fixing unit 13 can be a nickel sheet. Specifically, the conductivity of the fixing unit 13 can be smaller than that of the conductive sheet 11 , and the thickness of the fixing unit 13 can also be smaller than that of the conductive sheet 11 .

In an embodiment of the present invention, the surface of the pressing part 133 of the fixing unit 13 can be provided with at least one second protruding welding part 135, wherein the pressing part 133 is connected to the second part of the conductive sheet 11 via the second protruding welding part 135. Surface 113. Through the arrangement of the second protruding welding portion 135 , it is beneficial to connect the pressing portion 133 of the fixing unit 13 and the second surface 113 of the conductive sheet 11 through welding.

In addition, the surface of the fixing portion 131 of the fixing unit 13 can also be provided with at least one third protruding welding portion 137 , wherein the fixing portion 131 is connected to the battery core 12 through the third protruding welding portion 137 . The fixing unit 13 including the second protruding welding portion 135 and the third protruding welding portion 137 is only an embodiment of the present invention, and is not a limitation of the scope of the present invention.

In addition, the pressing part 133 of the fixing unit 13 can cover the conductive sheet 11 above the first protruding welding part 115, so that the pressing part 133 overlaps with the first protruding welding part 115, which is beneficial to further strengthen the conductive sheet through the fixing unit 13. 11 and the connection between the battery core 12.

In the above embodiments of the present invention, the fixing unit 13 is made of metal, and is connected to the battery core 12 and the conductive sheet 11 by welding. In different embodiments, the fixing unit 13 can also be made of non-metal. For example, the fixing unit 13 can be made of plastic, and can be connected to the battery core 12 and/or the conductive sheet 11 by gluing or ultrasonic welding. The fact that the fixing unit 13 is made of metal is only an embodiment of the present invention, and is not a limitation of the scope of rights of the present invention.

In addition, when the fixing unit 13 is connected to the battery core 12 and the conductive sheet 11 by gluing or ultrasonic welding, the fixing unit 13 does not need to have the second protruding welding portion 135 and the third protruding welding portion 137 .

In the embodiment of the present invention shown in FIG. 2, the appearance of the conductive sheet 11 is approximately fork-shaped, and there are a plurality of branches 117 at the end of the conductive sheet 11, wherein there is a space 112 between adjacent branches 117, such as the conductive sheet A plurality of branches 117 are provided at both ends of 11 . The first protruding welding portions 115 are respectively disposed on the branches 117 of the conductive sheet 11 , wherein the plurality of branches 117 at the same end of the conductive sheet 11 are used to connect to the same battery cell 12 .

As shown in Fig. 3 and Fig. 4, the main difference between the embodiment of the present invention and Fig. 1 and Fig. 2 is that in the embodiment of Fig. The number of battery cells 12 is the same, and the connection relationship between the end of the conductive sheet 11 and the battery cells 12 is strengthened through the fixing unit 13 .

In the embodiment shown in FIG. 3 and FIG. 4 , a plurality of battery cells 12 share the same fixing unit 13 . In the new embodiment, the fixing unit 13 includes two fixing parts 131 and a pressing part 133, wherein the two fixing parts 131 of the fixing unit 13 are respectively connected to different battery cells 12, and the pressing part 133 straddles the conductive both ends of sheet 11. The pressing portion 133 is used to contact and cover part or all of the second surface 113 of the conductive sheet 11 , and press the conductive sheet 11 toward the direction of the battery cell 12 .

Specifically, the fixing unit 13 is arranged along the conductive sheet 11, wherein the two fixing parts 131 of the fixing unit 13 are respectively welded to two different battery cells 12, and the pressing part 133 of the fixing unit 13 does not need to be welded on the conductive sheet. 11 on the second surface 113. In different embodiments, the pressing portion 133 of the fixing unit 13 can also be welded on the second surface 113 of the conductive sheet 11 to further enhance the fixing effect of the fixing unit 13 .

As shown in FIG. 5 and FIG. 6 , in the embodiment of the present invention, each battery cell 12 is respectively provided with a fixing unit 13 , wherein the number of fixing units 13 and battery cells 12 is the same. The fixing unit 13 of this embodiment includes two fixing parts 131 and a pressing part 133, wherein the two fixing parts 131 of the fixing unit 13 are connected to the same battery cell 12, and the pressing part 133 contacts and covers the part of the conductive sheet 11 On the second surface 113 , the conductive sheet 11 is pressed against the direction of the battery core 12 .

Since the fixing portions 131 at both ends of the fixing unit 13 are welded to the casing 121 of the same battery cell 12 , the pressing portion 133 of the fixing unit 13 does not need to be welded on the second surface 113 of the conductive sheet 11 . In different embodiments, the pressing portion 133 of the fixing unit 13 can also be welded on the second surface 113 of the conductive sheet 11 to further enhance the fixing effect of the fixing unit 13 .

The above is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention, that is, any equal changes and changes made according to the shape, structure, characteristics and spirit described in the patent scope of the present application. Modifications should be included in the scope of the patent application for the present model.

10: battery conductive frame 11: Conductive sheet 111: first surface 112: Interval 113: second surface 115: The first protruding welding part 117: branch 12: battery cell 121: shell 13: fixed unit 131: fixed part 132: Connecting part 133: Pressing part 135: The second protruding welding part 137: The third protruding weld

[Fig. 1] is a schematic cross-sectional view of an embodiment of the new battery conductive frame and battery core.

[ Fig. 2 ] is a top perspective view of the battery conductive frame and the battery core of the above-mentioned embodiment of the present invention.

[ Fig. 3 ] is a schematic cross-sectional view of another embodiment of the battery conductive frame and the battery core of the present invention.

[ Fig. 4 ] is a top perspective view of the battery conductive frame and the battery core of the above-mentioned embodiment of the present invention.

[ Fig. 5 ] is a schematic cross-sectional view of another embodiment of the battery conductive frame and the battery core of the present invention.

[ FIG. 6 ] is a top perspective view of the battery conductive frame and the battery core of the above-mentioned embodiment of the present invention.

10: battery conductive frame

11: Conductive sheet

111: first surface

113: second surface

115: The first protruding welding part

12: battery cell

121: shell

13: fixed unit

131: fixed part

132: Connecting part

133: Pressing part

135: The second protruding welding part

137: The third protruding weld

Claims (10)

A battery conductive frame, comprising: A conductive sheet comprising a first surface and a second surface, wherein the first surface and the second surface are two surfaces facing each other; A plurality of first protruding welding parts are arranged on the first surface of the conductive sheet and used for connecting a plurality of battery cells; and A fixing unit includes a fixing part and at least one pressing part, wherein the fixing part is used for connecting the battery core, and the pressing part is used for pressing the conductive sheet. The battery conductive frame as claimed in claim 1, wherein the pressing portion of the fixing unit overlaps with the first protruding welding portion of the conductive sheet. The battery conductive frame according to claim 1, comprising at least one second protruding welding part located at the pressing part of the fixing unit, and the pressing part of the fixing unit is connected to the conductive part through the second protruding welding part. The second surface of the sheet. The battery conductive frame according to claim 3, comprising at least one third protruding welding part located on the fixing part of the fixing unit, and the fixing part of the fixing unit is connected to the battery core through the third protruding welding part. The battery conductive rack as claimed in claim 1, wherein the fixing unit includes two fixing parts, which are respectively connected to different battery cells. The battery conductive rack as claimed in claim 1, wherein there are multiple fixing units, which are respectively connected to the multiple battery cells. The battery conductive frame according to claim 6, wherein the fixing unit includes two pressing parts, and the same battery cell is connected via the two pressing parts. The battery conductive frame as claimed in claim 1, wherein the conductive sheet includes a plurality of branches, and the first protruding welding portion is disposed on the branches. The battery conductive rack as claimed in claim 1, wherein the conductivity of the fixing unit is lower than that of the conductive sheet. The battery conductive frame according to claim 1, wherein the thickness of the fixing unit is smaller than that of the conductive sheet.

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