TWM593663U - Conductive frame of batteries - Google Patents

Abstract

The invention provides a conductive frame of batteries for connecting a plurality of battery cells, wherein the conductive frame comprises a first conductive portion and a plurality of second conductive portions, and the upper surface of each second conductive portion is connected to the first conductive portion through a eutectic portion. The lower surface of each second conductive portion is provided with at least one protruding welding portion, wherein the second conductive portion is connected to the housing of the battery cell through the protruding welding portion. The first conductive portion and the second conductive portion are made of different materials, wherein the resistance of the second conductive portion is greater than the resistance of the first conductive portion. Thus, a small current can be used to connect to the conductive frame and the battery cell, which not only reduces the consumption of energy, but also avoids damage of the battery cell during the electric welding process.

Description

Battery conductive frame

The present invention provides a battery conductive frame for connecting battery cells, and can avoid damage to the battery cells during the process of connecting the battery cells.

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 use temperature range, no memory effect, long life, and can be charged many times. Discharge and other advantages, and is widely used in portable electronic products such as mobile phones, notebook computers, digital cameras, etc. In recent years, it has expanded to the automotive field.

The structure of the cell mainly includes the positive electrode material, the electrolyte, the negative electrode material, the separation layer and the case, wherein the separation film separates the positive electrode material and the negative electrode material to avoid short circuit, and the electrolyte is provided on the porous separation film , And work as the conduction of ionic charge. The casing is used to cover the foregoing positive electrode material, separator, electrolyte and negative electrode material. Generally speaking, the casing is usually made of metal material.

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 will be connected by electric welding. During the welding process, it is necessary to increase the temperature of the battery conductive frame and the battery core, and apply the battery conductive frame to the positive electrode or negative electrode casing of the battery core. Press to complete the connection between the battery conductive frame and the battery core. However, in the above-mentioned process of connecting the battery conductive frame and the battery cell, the battery cell case is often damaged due to excessive pressure and/or excessive temperature, which in turn causes damage to the battery cell.

An object of the present invention is to provide a battery conductive frame including a first conductive portion and a plurality of second conductive portions, wherein the first conductive portion is connected to the second conductive portion through the eutectic portion. The first conductive portion and the second conductive portion are made of different metal materials, wherein the resistance of the second conductive portion is greater than the resistance of the first conductive portion. Through the application of the battery conductive frame described in the present invention, the energy consumed when the battery conductive frame and the battery core are connected by electric welding can be reduced, and the damage to the structure of the battery core during the electric welding process can be reduced to improve the product's Yield and reliability.

An object of the present invention is to provide a battery conductive frame, which mainly includes a first conductive portion and a plurality of second conductive portions, wherein the second conductive portion completely overlaps the first conductive portion, and forms a surface on the surface of the first conductive portion Raised. The battery conductive frame is connected to the battery core through the second conductive portion, wherein a gap is formed between the first conductive portion and the battery core, so that the battery liquid gas ejected from the failed battery core can be discharged through the gap, and the battery liquid gas and the battery conduction are reduced The chance of contact with the battery holder or other battery cells and the possible damage.

An object of the present invention is to provide a battery conductive frame for connecting a plurality of battery cells in series and/or parallel, wherein the battery core includes a positive electrode, a negative electrode and an insulating ring, and the insulating ring is used to isolate the positive electrode and the negative electrode of the battery core. The battery conductive frame can be connected to the positive electrode of the battery core through the second conductive portion, wherein the cross-sectional area of the second conductive portion is smaller than the cross-sectional area of the surrounding area formed by the positive electrode or the insulating ring.

The present invention provides a battery conductive frame, including: a first conductive portion; a plurality of second conductive portions, including a first surface and a second surface, wherein the first surface of the second conductive portion is connected to the first via a eutectic portion Conductive part; and at least one protruding welding part, which is provided on the second surface of the second conductive part and used to connect a battery cell, wherein the first conductive part and the second conductive part are made of different materials, and the second conductive part The resistance is greater than the resistance of the first conductive portion.

In the battery conductive frame, the second conductive portion includes at least one concave portion, which is located on the first surface of the second conductive portion, and the position of the concave portion corresponds to the protruding welding portion.

In the battery conductive frame, the second conductive portion partially overlaps the first conductive portion.

In the battery conductive frame, the protruding welding portion on the second conductive portion does not overlap with the first conductive portion.

In the battery conductive frame, the second conductive portion completely overlaps the first conductive portion, and a protrusion is formed on a surface of the first conductive portion, so that there is a gap between the first conductive portion and the connected battery core .

The battery conductive frame includes an insulating ring for isolating a positive electrode and a negative electrode of the battery core, the insulating ring has a surrounding area, and the positive electrode of the battery core is located in the surrounding area, and the cross-sectional area of the second conductive portion is less than or It is equal to the surrounding area of the insulating ring or the cross-sectional area of the positive electrode.

In the battery conductive frame, the second conductive portion includes at least one concave portion located on the first surface of the second conductive portion, the position of the concave portion corresponds to the protruding welding portion, and the eutectic portion is connected to the first surface of the second conductive portion And recesses.

In the battery conductive frame, the first conductive portion includes a plurality of branches, which are respectively connected to the second conductive portions.

In the battery conductive frame, the first conductive portion includes a plurality of branches, respectively connected to the plurality of sub-branches, and a second conductive portion is connected through the sub-branches.

Please refer to FIGS. 1 and 2, which are respectively a top view and a side view of an embodiment of a new type battery conductive frame. As shown in the figure, the battery conductive frame 10 mainly includes a first conductive portion 11, at least one second conductive portion 13 and at least one protruding welding portion 151, wherein the first conductive portion 11 and the second conductive portion 13 are made of different materials And connect the first conductive portion 11 and the second conductive portion 13 through a eutectic portion 12.

The second conductive portion 13 includes a first surface 131 and a second surface 133. For example, the first surface 131 and the second surface 133 may be two opposite surfaces on the second conductive portion 13, wherein a portion of the second conductive portion 13 The first surface 131 is connected to the first conductive portion 11 through the eutectic portion 12 to form the main structure of the battery conductive frame 10, and the first conductive portion 11 and the second conductive portion 13 can be connected by welding, for example.

In an embodiment of the present invention, at least one protruding welding portion 155 may be provided on the first surface 131 of the second conductive portion 13, wherein the protruding welding portion 155 may protrude from the first surface 131 of the second conductive portion 13 For bumps, the second conductive portion 13 may be connected to the first conductive portion 11 via the protruding solder portion 155. In practical applications, the first conductive portion 11 and the second conductive portion 13 can be connected by resistance welding, for example, the protruding solder portion 155 on the first surface 131 of the second conductive portion 13 can be contacted under the first conductive portion 11 Power supply to the second conductive portion 13 through the first conductive portion 11 to increase the temperature of the protruding solder portion 155 of the second conductive portion 13 and the first conductive portion 11 in contact, and between the first conductive portion 11 and the first A eutectic portion 12 is formed between the two conductive portions 13.

In addition, the second surface 133 of the second conductive portion 13 is provided with at least one protruding welding portion 151, wherein the protruding welding portion 151 may be a bump protruding from the second surface 133 of the second conductive portion 13, and the second conductive portion 13 may The case 171 of the battery cell 17 is connected via the protruding weld 151, for example, the positive or negative electrode of the case is connected.

In an embodiment of the present invention, the protruding welding portions 155/151 can be formed on the first surface 131 and the second surface 133 of the second conductive portion 13 by stamping, respectively, and the second of the second conductive portion 13 At least one concave portion 157/153 is formed on the surface 133 and the first surface 131, wherein the position of the concave portion 157/153 corresponds to the position of the protruding welding portion 155/151.

Of course, the second conductive portion 13 manufactured by stamping is only an embodiment of the present invention, and is not limited by the scope of the rights of the new type. Therefore, the first surface 131 and the second surface 133 of the second conductive portion 13 have at least one concave portion 153 /157 is not a limitation of this new model. In actual application, the second conductive portion 13 may be manufactured in other ways, for example, the second conductive portion 13 is manufactured by casting, so that there are no concave portions 153/157 on the first surface 131 and the second surface 133 of the second conductive portion 13.

In the embodiment of the present invention, the second conductive portion 13 and the first conductive portion 11 partially overlap, wherein the protruding solder portion 151 and/or the concave portion 153 of the second conductive portion 13 will not overlap with the first conductive portion 11. Specifically, the protruding solder portion 151 and/or the recessed portion 153 may be provided in the region of the second conductive portion 13 that does not overlap with the first conductive portion 11 so that the eutectic connecting the first conductive portion 11 and the second conductive portion 13 The portion 12 does not contact the concave portion 153 of the second conductive portion 13.

In practical application, the second conductive portion 13, the protruding welding portion 151 and the case 171 of the battery core 17 are mainly connected by welding. Welding is a process technology for joining heterogeneous metals by heating or pressing.

In an embodiment of the present invention, the second conductive portion 13, the protruding welding portion 151 and the case 171 of the battery core 17 can be connected by resistance welding. First, the protruding welding portion 151 on the second conductive portion 13 contacts the battery The core 17 is, for example, a case 171 contacting the positive electrode or the negative electrode of the battery cell 17, wherein the case 171 is made of metal.

Then, current is supplied to the second conductive portion 13, the protruding welding portion 151, and the case 171 of the battery cell 17, since the second conductive portion 13, the protruding welding portion 151, and the case 171 of the battery cell 17 are all made of metal and have Because of the resistance, when the current passes through the second conductive portion 13, the protruding welding portion 151 and the case 171 of the battery cell 17, the temperature of the protruding welding portion 151 and the case 171 of the battery cell 17 in contact with it increases.

When the temperatures of the second conductive portion 13, the protruding welding portion 151 and the casing 171 of the battery core 17 reach a certain value, they will melt to form a molten pool. Then, the pressure is applied to the case 171 of the battery core 17 through the second conductive portion 13 and the protruding weld portion 151, so that the protruding weld portion 151 on the second conductive portion 13 sinks into the case 171 of the battery core 17 until the second conductive After the temperature of the portion 13, the protruding welded portion 151, and the case 171 of the battery core 17 drops, the connection between the second conductive portion 13 and the battery core 17 is completed.

Generally speaking, the battery conductive frame is usually made of a material with low resistance and high conductivity characteristics to reduce the energy loss caused when the battery core is charged and discharged through the battery conductive frame. When connecting the low-resistance battery conductive frame and the contacted battery core shell through resistance welding, it is necessary to provide a large current to the battery conductive frame and the battery core shell, and increase the welding of the battery conductive frame and the battery core The energy consumed.

In addition, the battery conductive frame usually has a larger thickness to increase the cross-sectional area of the battery conductive frame and reduce the resistance of the battery conductive frame. However, as the thickness of the battery conductive frame increases, the structural strength of the battery conductive frame will be improved, so that the battery conductive frame is less likely to be deformed when connected to the casing of the battery core. Therefore, when the pressure is applied to the battery core case through the battery conductive frame, it will cause a large deformation of the battery core case, for example, the protruding weld on the battery conductive frame will form a deeper in the battery core case Or a wider depression.

In this way, during the process of connecting the battery conductive frame and the battery cell, the battery cell shell structure may be damaged, for example, a metal crack is generated in the battery cell shell, which may affect the reliability and durability of the battery cell. However, in order to avoid the above-mentioned problems when welding the battery conductive frame and the battery core, selecting a battery conductive frame with high resistance and low conductivity will increase the energy loss caused by the battery core charging and discharging through the battery conductive frame.

In order to solve the above problems, the present invention proposes to manufacture the battery conductive frame 10 from two different materials, wherein the first conductive portion 11 and the second conductive portion 13 are respectively different materials, and the resistance and/or resistance of the second conductive portion 13 The coefficient is greater than the first conductive portion 11, that is, the conductivity of the first conductive portion 11 is higher than that of the second conductive portion 13. For example, the first conductive portion 11 may be copper, and the second conductive portion 13 may be nickel.

Since the second conductive portion 13 has a large resistance, when the second conductive portion 13 of the battery conductive frame 10 and the case 171 of the contacted battery core 17 are connected by resistance welding, the supply to the second conductive portion can be reduced The current of 13 can be connected by resistance welding to the second conductive portion 13 and the housing 171 of the battery core 17, thereby effectively reducing the energy consumed when connecting the battery conductive portion 10 and the battery core 17.

In addition, the thickness of the second conductive portion 13 can be further reduced to reduce the structural strength of the second conductive portion 13, for example, the thickness or cross-sectional area of the second conductive portion 13 is smaller than that of the first conductive portion 11. When the second conductive portion 13 and the case 171 of the battery core 17 are connected by resistance welding, both the second conductive portion 13 and the case 171 of the battery core 17 are deformed, which can reduce the degree of deformation of the case 171 of the battery core 17, For example, the protruding welding portion 151 on the second conductive portion 13 may be deformed during resistance welding, and may reduce the depth of the deformation portion 173 caused by the protruding welding portion 151 pressing the case 171 of the battery cell 17 and/or Or area, as shown in Figure 3. In this way, the structure of the casing 171 of the battery core 17 can be prevented from being damaged during the process of connecting the battery conductive frame 10 and the battery core 17, for example, the metal casing of the battery core 17 can be prevented from cracking, so as to improve the durability of the battery core 17 and Reliability.

In addition, since the resistance value of the first conductive portion 11 is low, the resistance value of the battery conductive frame 10 will not increase greatly due to the arrangement of the second conductive portion 13, which can reduce the charging of the battery core 17 through the battery conductive frame 10 Energy loss caused by discharge.

In the embodiment of FIG. 1 of the present invention, the appearance of the first conductive portion 11 is similar to a fishbone shape, and has a plurality of branches 111, wherein each branch 111 of the first conductive portion 11 is connected to a first through the eutectic portion 12 Two conductive portions 13, for example, the first conductive portion 11 may include six branches 111, and six second conductive portions 13 are respectively connected through the six branches 111, wherein the six second conductive portions 13 are respectively connected to a battery cell 17 , So that the battery conductive frame 10 connects six battery cells 17 in series and/or in parallel.

In another embodiment of the present invention, as shown in FIG. 4, each branch 111 of the first conductive portion 11 may be provided with a plurality of sub-branches 113, wherein each sub-branch 113 is connected to a second conductive portion 13, Each branch 111 of the first conductive portion 11 is connected to the plurality of second conductive portions 13 respectively. For example, the first conductive portion 11 may include six branches 111, wherein each branch 111 is connected to two secondary branches 113 respectively, and each secondary branch 113 is connected to a second conductive portion 13 respectively, so that each branch 111 passes through two A second conductive portion 13 is connected to a battery cell 17.

Specifically, the number of branches 111 and sub-branches 113 on the first conductive portion 11 and the number of second conductive portions 13 and battery cores 17 connected to the first conductive portion 11 are not limited by the scope of the present invention.

Please refer to FIGS. 5 and 6, which are a top view and a side view, respectively, of another embodiment of the new battery conductive frame. As shown, the battery conductive frame 20 mainly includes a first conductive portion 21, at least one second conductive portion 23, and at least one protruding welding portion 251, wherein the first conductive portion 21 and the second conductive portion 23 are made of different materials , And connected through a eutectic section 22.

Specifically, the second conductive portion 23 includes a first surface 231 and a second surface 233, wherein the first surface 231 of the second conductive portion 23 is connected to the first conductive portion 21 through the eutectic portion 22 to form a battery conductive frame 20's main structure.

In an embodiment of the present invention, at least one protruding welding portion 255 may be provided on the first surface 231 of the second conductive portion 23, wherein the protruding welding portion 255 may protrude from the first surface 231 of the second conductive portion 23 For bumps, the second conductive portion 23 may be connected to the first conductive portion 21 via the protruding solder portion 255. In practical applications, the first conductive portion 21 and the second conductive portion 23 can be connected by resistance welding. For example, the protruding solder portion 255 on the first surface 231 of the second conductive portion 23 can be contacted under the first conductive portion 21 Power supply to the second conductive portion 23 through the first conductive portion 21 to increase the temperature of the protruding solder portion 255 of the second conductive portion 23 and the first conductive portion 21 in contact, and between the first conductive portion 21 and the first A eutectic portion 22 is formed between the two conductive portions 23.

In the embodiment of the present invention, as shown in FIG. 6, the cross-sectional area A2 of the second conductive portion 23 is smaller than the cross-sectional area A1 of the first conductive portion 21, wherein the second conductive portion 23 completely overlaps the first conductive portion 21, and A protrusion is formed on the surface of the first conductive portion 21, for example, the first conductive portion 21 completely overlaps the first surface 231 and/or the second surface 233 of the second conductive portion 23. After the second conductive portion 23 is connected to the first conductive portion 21 through the eutectic portion 22, the second conductive portion 23 will form a convex conductive portion on the surface of the first conductive portion 21 (below surface).

The second surface 233 of the second conductive portion 23 is provided with at least one protruding welding portion 251, wherein the protruding welding portion 251 may be a bump protruding from the second surface 233 of the second conductive portion 213, and the second conductive portion 23 The first surface 231 may be provided with at least one concave portion 253, wherein the installation position of the concave portion 253 corresponds to the installation position of the protruding welding portion 251. In different embodiments, the first surface 231 of the second conductive portion 23 may not have the concave portion 253.

Since the second conductive portion 23 completely overlaps the first conductive portion 21, the protruding solder portion 251 and/or the concave portion 253 on the second conductive portion 23 also overlap the first conductive portion 21. When the first surface 231 of the second conductive portion 23 has a concave portion 253, the eutectic portion 22 connecting the first conductive portion 21 and the second conductive portion 23 may be located only on the first surface 231 of the second conductive portion 23, wherein the concave portion In 253, the eutectic portion 22 is not provided. In different embodiments, the first surface 231 and the concave portion 253 of the second conductive portion 23 are all provided with the eutectic portion 22.

In an embodiment of the present invention, the second conductive portion 23, the protruding welding portion 251 and the case 271 of the battery core 27 can be connected by resistance welding to complete the connection between the second conductive portion 23 and the battery core 27. In the present embodiment, the battery conductive frame 20 is made of two different materials, wherein the resistance and/or resistivity of the second conductive portion 23 is greater than that of the first conductive portion 21, that is, the conductivity of the first conductive portion 21 is higher than that of the second Conductive part 23. For example, the first conductive portion 21 may be copper, and the second conductive portion 23 may be nickel.

Therefore, when the battery conductive frame 20 and the case 271 of the contacted battery core 27 are connected by resistance welding, the current supplied by the first conductive portion 21 to the second conductive portion 23 and the case 271 of the battery core 27 can be reduced. The energy consumed when connecting the battery conductive portion 20 and the battery core 27 can be effectively reduced.

In addition, the thickness of the second conductive portion 23 can also be reduced to reduce the structural strength of the second conductive portion 23, so that the protruding welding portion 251 on the second conductive portion 23 will also be deformed during the resistance welding process, which can be reduced The depth and/or area of the deformed portion 273 generated by the protrusion welding portion 251 pressing the case 271 of the battery core 27 is shown in FIG. 7 to avoid damaging the case structure of the battery core 27 when connected.

In the embodiment of FIG. 5 of the present invention, the appearance of the first conductive portion 21 is similar to a fish-bone shape, having a plurality of branches 211, and respectively connected to each branch 211 of the first conductive portion 21 through the eutectic portion 22 The second conductive portions 23, wherein each second conductive portion 23 completely overlaps the branch 211 of the connected first conductive portion 21, respectively.

In another embodiment of the present invention, as shown in FIG. 8, each branch 211 of the first conductive portion 21 may be connected to a plurality of secondary branches 213 respectively, wherein each secondary branch 213 is respectively connected to a second conductive portion 23, Each branch 211 of the first conductive portion 21 is connected to a plurality of second conductive portions 23 respectively, and a battery cell 27 is connected through the plurality of second conductive portions 23.

Specifically, the number of branches 211 and sub-branches 213 on the first conductive portion 21, and the number of second conductive portions 23 and battery cores 27 connected to the first conductive portion 21 are not limited by the scope of the present invention.

Since the second conductive portion 23 completely overlaps the first conductive portion 21 and protrudes from the surface (as shown below) of the first conductive portion 21, when the battery conductive frame 20 is connected to the case 271 of the battery core 27 through the second conductive portion 23 A gap G is formed between the first conductive portion 21 and the connected battery core 27, as shown in FIG. 7. When the battery core 27 is damaged and gas of the battery liquid is ejected, the ejected battery liquid gas may be discharged through the gap G between the first conductive portion 21 and the battery core 27, and the battery liquid gas and the battery conductive frame 20 and/or The time or opportunity for other battery cells 27 to contact to reduce damage to other battery cells 27.

In an embodiment of the present invention, the battery cell 27 may include a positive electrode 272 and a negative electrode 274, and the positive electrode 272 and the negative electrode 274 of the battery cell 27 are separated by an insulating ring 275. Specifically, the insulating ring 275 may form a surrounding area 24 in which the positive electrode 272 of the battery cell 27 is located in the surrounding area 24 of the insulating ring 275, the area of the positive electrode 272 is less than or equal to the area of the surrounding area 24, and the negative electrode 274 is located The outside of the insulating ring 275.

In an embodiment of the present invention, the cross-sectional area A2 of the second conductive portion 23 is less than or equal to the cross-sectional area A3 of the surrounding area 24 inside the insulating ring 275, that is, the cross-sectional area A2 of the second conductive portion 23 is less than or equal to the The cross-sectional area of the positive electrode 272. When the battery conductive frame 20 is connected to the positive electrode of the battery cell 27, only the second conductive portion 23 will be in contact with the positive electrode located in the insulating ring 275.

Generally speaking, when the battery cell 27 fails, the battery liquid inside the battery cell 27 is usually ejected from the battery cell 27 by the insulating ring 275 at the boundary between the positive electrode 272 and the negative electrode 274. In the present embodiment, because the second conductive portion 23 is only connected to the positive electrode 272 inside the insulating ring 275, and there is a gap G between the first conductive portion 21 and the insulating ring 275 of the battery cell 27 and the case 271, As a result, the battery liquid gas discharged from the battery cell 27 can be transferred to the outside through the gap G.

The above is only one of the preferred embodiments of the new model, and is not intended to limit the scope of the implementation of the new model, that is, any changes in shape, structure, features and spirit described in the patent application of the new model Modifications should be included in the patent application of this new model.

10: Battery conductive frame 11: The first conductive part 111: branch 113: secondary branch 12: Eutectic Department 13: Second conductive part 131: first surface 133: Second surface 151: Protruding weld 153: recess 17: battery cell 171: Shell 173: Deformation 20: battery conductive frame 21: The first conductive part 211: Branch 213: Secondary branch 22: Eutectic Department 23: Second conductive part 231: The first surface 233: Second surface 24: Surrounding area 251: Protruding weld 253: recess 27: battery cell 271: Shell 272: Positive 273: Deformation 274: negative 275: Insulation ring A1: Cross-sectional area A2: Cross-sectional area A3: Cross-sectional area G: gap

Fig. 1: A top view of an embodiment of a new type of battery conductive frame.

Figure 2: This is a side view of an embodiment of a new type of battery conductive frame and battery core.

Figure 3: This is a side connection diagram of an embodiment of the new-type battery conductive frame and battery core.

Figure 4: A top view of another embodiment of the new battery conductive frame.

Figure 5: A top view of another embodiment of the new battery conductive frame.

Figure 6: A side view of another embodiment of the new type battery conductive frame and battery core.

Figure 7: A side connection diagram of an embodiment of the new type battery conductive frame and battery core

Figure 8: A top view of another embodiment of the new battery conductive frame.

10: Battery conductive frame

11: The first conductive part

12: Eutectic Department

13: Second conductive part

131: first surface

133: Second surface

151: Protruding weld

153: recess

17: battery cell

171: Shell

Claims (10)

A battery conductive frame, including: A first conductive part; A plurality of second conductive portions, including a first surface and a second surface, wherein the first surface of the second conductive portion is connected to the first conductive portion via a eutectic portion; and At least one protruding welding portion is provided on the second surface of the second conductive portion and is used to connect a battery cell, wherein the first conductive portion and the second conductive portion are made of different materials, and the second conductive portion Has a resistance greater than that of the first conductive part. The battery conductive frame as described in Item 1 of the patent application range, wherein the second conductive portion includes at least one concave portion located on the first surface of the second conductive portion, and the position of the concave portion corresponds to the protruding welding portion. The battery conductive frame as described in item 1 of the patent application range, wherein the second conductive portion partially overlaps the first conductive portion. The battery conductive frame as described in item 3 of the patent application range, wherein the protruding welding portion on the second conductive portion does not overlap with the first conductive portion. The battery conductive frame as described in item 1 of the patent application range, wherein the second conductive portion completely overlaps the first conductive portion, and a protrusion is formed on a surface of the first conductive portion so that the first conductive portion There is a gap between the connected battery core. The battery conductive frame as described in item 5 of the patent application scope includes an insulating ring for isolating a positive electrode and a negative electrode of the battery cell, the insulating ring has a surrounding area, and the positive electrode of the battery cell is located in the surrounding area And the cross-sectional area of the second conductive portion is less than or equal to the cross-sectional area of the surrounding area of the insulating ring or the positive electrode. The battery conductive frame as described in item 5 of the patent application range, wherein the second conductive portion includes at least one recessed portion located on the first surface of the second conductive portion, the position of the recessed portion corresponds to the protruding welding portion, and the The eutectic portion connects the first surface of the second conductive portion and the recess. The battery conductive frame as described in item 1 of the patent application range, wherein the first conductive portion includes a plurality of branches, which are respectively connected to the second conductive portions. The battery conductive frame as described in item 1 of the patent application range, wherein the first conductive portion includes a plurality of branches, respectively connected to a plurality of sub-branches, and a second conductive portion is connected through the sub-branches. The battery conductive frame as described in item 1 of the patent application range, wherein the thickness or cross-sectional area of the second conductive portion is smaller than the thickness or cross-sectional area of the first conductive portion.

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