TWM624127U - battery module - Google Patents

Abstract

This creation relates to a battery module, including an insulating base, a pair of electrodes and a plurality of battery packs, each electrode is arranged on the insulating base, each electrode has a lap joint and a wiring portion exposed on the insulating base, and each battery A pair of tabs extends smoothly in the package, and at least a part of the ends of the tabs are respectively attached to the corresponding overlapping parts; the tabs are not easily deformed, and the battery module can have good electrical conductivity Efficiency and service life and easy replacement of battery packs.

Description

battery module

This creation is about a battery module, especially a battery module whose tabs are not easily distorted, have good electrical conductivity, and are convenient to replace battery packs.

Due to the advantages of high energy conversion efficiency, long service life and high stability, lithium iron batteries are gradually being widely used in various electronic products. A ductile soft bag body will be used as the outer packaging of the lithium iron battery, that is, a soft pack battery (Laminate Polymer Battery or Polymer Battery), and it can be connected in series or parallel with other soft pack batteries according to different power requirements, thus forming a battery pack. The battery module is used as a power source for the electronic device.

When a general pouch battery is connected in series or parallel, the tabs and electrode posts of each pouch battery are usually connected by soldering. However, in order for the tabs of each pouch battery to overlap with the electrode posts, the tabs are often twisted and deformed, and especially the tabs of the pouch batteries that are farther outside the electrode post, the resistance impedance at the distorted and deformed part of the tabs will be greatly increased. Lifting, the temperature at the twisted deformation of the tab increases, and it breaks due to shear stress, which leads to problems such as poor electrical conductivity, low service life, and difficulty in replacement and maintenance of the pouch battery.

In view of this, the creator of the present invention has devoted himself to the research and application of the theory, aiming at the above-mentioned deficiencies of the prior art, to try his best to solve the above-mentioned problems, which has become the goal of the creator's improvement.

The main purpose of this creation is to make the tabs less likely to be twisted and deformed, and the battery module can have good electrical conductivity and service life, and it is convenient to replace the battery pack.

In order to achieve the above-mentioned purpose, the present invention provides a battery module including an insulating base, a pair of electrodes and a plurality of battery packs, each electrode is mounted on the insulating base, and each electrode has an overlap portion and is exposed on the insulating base In a connection part of the seat, each battery pack has a pair of tabs extending smoothly, and at least a part of the ends of the tabs are respectively attached to the corresponding overlapping parts.

The invention also has the following effects: the studs extending vertically from the wiring portion to the direction away from the overlapping portion can facilitate the user to perform wiring operations. The positive and negative terminals of different battery packs can be connected through the series electrodes, so that the two battery packs can be connected in series. The battery packs and the tabs can be preliminarily fixed by the insulating tapes attached to the sides of the battery packs and the outside of the tabs. The turning section of the series electrode is protruded with a detection column extending out of the substrate, so that the voltage and current can be easily measured so as to know whether the circuit is normal without disassembling the power module. The battery pack can be prevented from being deformed or damaged by the casing installed outside the battery pack as protection.

The detailed description and technical content of this creation will be described with the drawings as follows, but the attached drawings are only for illustrative purposes and are not intended to limit this creation.

The present invention provides a battery module, please refer to FIG. 1 to FIG. 5 , which mainly includes an insulating base 10 , a pair of electrodes 20 and a plurality of battery packs 30 .

The insulating base 10 is generally in the shape of a long strip, which can be made of plastic or other materials with good insulating properties, which is not limited in the present invention. Specifically, the insulating base 10 includes a substrate 11 and a partition wall 12 disposed at the bottom center of the substrate 11 .

The pair of electrodes 20 includes a positive electrode 21 and a negative electrode 22, and each electrode 20 is a copper sheet, but the invention is not limited to this, as long as it is a metal sheet body with good electrical conductivity. Each electrode 20 is erected on the insulating base 10 , and each electrode 20 has an overlapping portion 23 and a wiring portion 24 exposed on the insulating base 10 . Specifically, each overlapping portion 23 is embedded in the insulating base 10 , and each wiring portion 24 is protruded and exposed above the substrate 11 . In this embodiment, each wiring portion 24 is vertically bent from the corresponding overlapping portion 23, so that each wiring portion 24 is horizontally attached to the outer surface of the substrate 11 of the insulating base 10, but this is not the case in this invention. Limited, for example, each wiring portion 24 and each corresponding overlapping portion 23 may also be non-bending sheet bodies in the same plane and are perpendicular to the substrate 11 together. Preferably, each wiring portion 24 can also have a stud 241 extending vertically in a direction away from each overlapping portion 23 , so that the wiring operation can be facilitated by the user. In addition, in the present embodiment, the overlapping parts 23 are located on the left and right sides of the partition wall 12, but the present invention is not limited to this, for example, the overlapping parts 23 can also be located in the partition wall 12, or The overlapping parts 23 can also be located on the same side of the partition wall 12, and can be adjusted according to the design requirements.

A pair of tabs 31 extends smoothly from the top of each battery pack 30 , and ends of at least a part of the tabs 31 are respectively attached and electrically connected to the corresponding overlapping portions 23 . The pair of tabs 31 of each battery pack 30 includes a positive tab 311 and a negative tab 312 , and at least a part of the positive tabs 311 is correspondingly attached to the overlapping portion 23 of the positive electrode 21 . At least a part of the ears 312 is correspondingly attached to the overlapping portion 23 of the negative electrode 22 . In this embodiment, the connection method of each tab 31 and each overlap portion 23 is welding (such as surface mount welding technology SMT or laser welding), but the invention is not limited to this, as long as each tab can be connected 31 and each overlapping portion 23 can be fixed to each other and kept electrically connected. In this way, each tab 31 is attached smoothly, so that it is not easy to bend and can maintain good electrical conductivity, and due to the low resistance impedance, it is not easy to generate overheating or generate shear stress to cause breakage, so that the service life of each battery pack 30 can be prolonged. , and at the same time, it is also convenient for maintenance personnel to quickly perform desoldering to replace or repair each battery pack 30 . Preferably, the battery module of the present invention may further include a plurality of insulating tapes 40 . The insulating tapes 40 are attached to the sides of the battery packs 30 and the outside of the tabs 31 , so that the battery packs 30 and the tabs 31 can be preliminarily fixed and effectively insulated to prevent other substances from affecting the electrical conductivity of the battery packs 30 . effectiveness. In this embodiment, the insulating tape 40 may be a PI (KAPTON) tape with high temperature resistance and a flame retardant rating of UL-V0 or higher, but the present invention is not limited to this.

The following describes the connection methods of different numbers of battery packs 30 in the battery module:

When the number of battery packs 30 is two and connected in parallel, the positive tab 311 of one of the battery packs 30 is attached to the lap portion 23 of the positive electrode 21 for connection, and the negative tab 312 corresponds to the lap portion of the negative electrode 22 . 23 is attached for connection, and the two overlapping parts 23 of the positive electrode 21 and the negative electrode 22 are preferably located on the same side of the partition wall 12 or inside the partition wall 12 so that the battery pack 30 can be kept vertically arranged. The positive tab 311 of the other battery pack 30 is attached to the outside of the positive tab 311 of the previous battery pack 30 , and the negative tab 312 is attached to the outside of the negative tab 312 of the previous battery pack 30 . Therefore, each of the positive electrodes 311 is electrically connected to the positive electrode 21 , and each of the negative electrodes 312 is electrically connected to the negative electrode 22 , so that the two battery packs 30 can be connected in parallel.

When the number of battery packs 30 is two and connected in series, the battery module of the present invention may further include a series electrode 50 . The series electrode 50 is a metal sheet body with good electrical conductivity, and is attached to the partition wall 12 of the insulating base 10 . Specifically, the series electrode 50 is generally in the shape of a lightning bolt and has two welding sections 51 on the left and right sides of the partition wall 12 and a turning section 52 embedded in the partition wall 12 . The positive tab 311 of one battery pack 30 and the negative tab 312 of the other battery pack 30 are attached and connected to the second welding section 51 respectively, and the other negative tab 312 and the other positive tab 311 are attached and connected to the negative electrode 22 respectively The overlapping portion 23 of the positive electrode 21 and the overlapping portion 23 of the positive electrode 21 can connect the two battery packs 30 in series through the series electrode 50 . In this embodiment, the series electrode 50 is a composite material sheet made of a mixture of metals such as zinc, copper, silver, lead or tin, and the ratio of each metal can be adjusted according to different current thresholds. , so the present invention does not limit it. In this way, when the current exceeds a certain threshold, a fuse mechanism can be generated, so as to prevent the excessive current from affecting other battery packs 30 and the overall circuit, and block the series connection between the battery packs 30 to prevent other battery packs 30 from being connected in series. There is also a chain reaction that is destroyed.

When the number of battery packs 30 is four, and the battery packs 30 are connected in parallel in groups of two and then connected in series, the connection method is basically the same as the series connection of two battery packs 30 , the difference is only the extra two battery packs 30 are located on the left and right sides respectively, and the positive tab 311 and the negative tab 312 of the extra two battery packs 30 are attached to the outside of the positive tab 311 and the negative tab 312 of the adjacent battery pack 30 respectively. Thereby, the extra two battery packs 30 can be respectively connected in parallel with the two battery packs 30 originally connected in series, so as to achieve the effect that two parallel battery packs 30 are connected in series.

It is further explained that a detection column 521 is protruded from the turning section 52 of the series electrode 50 and protrudes through the substrate 11 of the insulating base 10 , so as to facilitate the user to measure the voltage and current without disassembling the power module. It can be known whether the circuit between the battery packs 30 is normal or not, but the present invention does not specifically limit the position of the detection column 521 . In addition, the battery module of the present invention may further include a casing 60 . The housing 60 is a hollow shell and has an opening 61 . The substrate 11 of the insulating base 10 is sealed in the opening 61 so that the outer surface of the substrate 11 away from the partition wall 12 is exposed outside the casing 60 , so that the battery pack 30 can be accommodated in the casing 60 as a protection to avoid deformation of the battery pack 30 At the same time, each overlapping portion 23 is also accommodated in the casing 60, and only the wiring portion 24 is exposed outside for the user to wire. Preferably, the battery module may further include a plurality of bolts A. A locking hole 121 is respectively provided on the front and rear sides of the partition wall 12 of the insulating base 10 , and a through hole 62 is respectively defined in the housing 60 corresponding to each locking hole 121 , and each bolt A passes through the corresponding through hole 62 . The rear is locked in each locking hole 121 , so that both the casing 60 and the insulating base 10 can be fixed, and it is convenient for maintenance personnel to quickly take out the battery pack for maintenance or replacement.

To sum up, this creation has industrial applicability, novelty and progress, and fully meets the requirements for patent application. Of course, this creation can also have other various embodiments, without departing from the spirit and essence of this creation, those skilled in the art can evolve various corresponding changes and deformations according to this creation, but these corresponding changes and deformation shall belong to the protection scope of the patent applied for in this creation.

10: Insulation base 11: Substrate 12: Partition Wall 121: keyhole 20: Electrodes 21: positive pole 22: negative pole 23: Lap joint 24: Wiring Department 241: Stud 30: battery pack 31: polar ears 311: Positive ear 312: Negative ear 40: Insulation tape 50: series electrodes 51: Welding segment 52: Turning paragraph 521: Detection column 60: Shell 61: Opening 62: Through hole A: Bolt

Figure 1 is an exploded perspective view of the insulating base and the outer casing of the present invention.

Figure 2 is an exploded perspective view of this creation.

Figure 3 is a three-dimensional appearance view of this creation.

Figure 4 is a sectional view of this creation.

Figure 5 is another cross-sectional view of the present invention.

10: Insulation base

11: Substrate

12: Partition Wall

121: keyhole

20: Electrodes

21: positive pole

22: negative pole

23: Lap joint

24: Wiring Department

241: Stud

30: battery pack

31: polar ears

311: Positive ear

312: Negative ear

50: series electrodes

51: Welding segment

52: Turning paragraph

521: Detection column

60: Shell

61: Opening

62: Through hole

A: Bolt

Claims (10)

A battery module, comprising: an insulating base; a pair of electrodes disposed on the insulating base, each of the electrodes having an overlapping portion and a wiring portion exposed on the insulating base; and The plurality of battery packs respectively have a pair of tabs extending smoothly, and at least a part of the ends of the tabs are respectively attached to the corresponding overlapping portions. The battery module according to claim 1, wherein at least a part of the tabs is welded to the corresponding overlapping portions respectively. The battery module of claim 1, wherein the overlapping portion of each electrode is embedded in the insulating base, and the wiring portion of each electrode is attached to the outer surface of the insulating base. The battery module as claimed in claim 3, wherein each of the connecting portions respectively vertically extends a stud in a direction away from the overlapping portions. The battery module of claim 1, wherein the pair of electrodes includes a positive electrode and a negative electrode, the pair of electrode tabs of each battery pack includes a positive electrode tab and a negative electrode tab, and at least one of the positive electrode tabs A portion is attached to the lap portion of the positive electrode, and at least a portion of the negative electrode ears is attached to the lap portion of the negative electrode. The battery module according to claim 5, further comprising a series electrode, the series electrode is arranged on the insulating base, wherein the positive terminal of one of the battery packs and the negative terminal of the other battery pack are respectively attached at both ends of the series electrodes. The battery module according to claim 6, wherein the insulating base comprises a base plate and a partition wall disposed at the bottom of the base plate, and two ends of the series electrodes are respectively located on the left and right sides of the partition wall. The battery module as claimed in claim 7, wherein the series electrode is protruded with a detection column protruding through the substrate. The battery module according to claim 1, further comprising a casing having an opening, and the insulating base seals the opening so that the battery case is contained in the casing. The battery module according to claim 9, further comprising a bolt, a locking hole is formed on a side of the insulating base, a through hole is formed in the housing corresponding to the locking hole, and the bolt is locked after passing through the through hole. in this keyhole.

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