CN203277547U - secondary battery end cover group - Google Patents

Abstract

The utility model discloses a secondary battery end cover group sets up on the secondary battery casing, secondary battery end cover group includes a shrouding, set up in the one end of casing, on the shrouding and have the plural number and perforate in order to set up two terminal groups respectively, each terminal group wears to locate in perforating including a conductive terminal, and the one end that conductive terminal worn out the shrouding is equipped with an installation department, it is equipped with an at least fixed element who has female screw thread, for being equipped with the locking part of a male screw thread, pass the installation department lock solid in fixed element female screw thread, wherein fixed element is the same with the locking part material. Therefore, the utility model discloses when utilizing locking part lock solid conducting strip to use series connection secondary battery as the group battery, can avoid causing the screw thread to damage because of the difference of soft or hard degree when the lock solid because of conductive terminal and locking part leads to the pine of conducting strip to take off and causes the secondary battery group impedance value to rise.

Description

Secondary battery end cap group

technical field

The utility model relates to a battery end cover group, in particular to a secondary battery end cover group with conductive terminals having high-hardness locking elements.

Background technique

In order to make the battery generate greater power, it is necessary to connect multiple secondary batteries in series. When connecting multiple secondary batteries in series, it is necessary to use a conductive sheet to connect the conductive terminals of the multiple secondary batteries so that the multiple secondary batteries can be connected in series. Battery.

As shown in FIG. 1 for the battery pack, the conductive sheet 74 uses a locking member 72 to penetrate the conductive sheet 74 and then lock the conductive sheet 74 to the conductive terminal 70 to electrically connect the conductive terminals 70 in series. However, since the conductive terminal 70 usually uses a metal material with high conductivity such as copper or aluminum as the conductive terminal 70, and the locking member 72 is usually made of stainless steel, since the hardness of copper or aluminum is lower than that of stainless steel, if you want to disassemble the battery When assembled, the result of repeated locking over a long period of time may cause the conductive terminal 70 to be impacted by the locking member 72 and cause damage to the internal thread.

Furthermore, the materials of the locking member 72 and the conductive terminal 70 are different, so the thermal expansion coefficients are also different, and because the battery will generate a higher temperature during operation, if the expansion coefficients are different, the front of the locking member 72 and the conductive terminal 70 will be easily deformed and loose. Relatively, the conductive sheet will be loosened, which may cause the impedance value of the battery pack to rise, thus causing the battery temperature to rise and cause overheating and other dangers.

In view of this, the utility model proposes a secondary battery end cover set to effectively overcome the above-mentioned problems.

Contents of the invention

The main purpose of this utility model is to provide a secondary battery end cover group, which can avoid thread damage due to the difference in softness and hardness of the material when the conductive terminal and the locking member are locked due to different materials, and can avoid The deformation caused by the different coefficients of thermal expansion, the loosening of the conductive sheet will cause the impedance value of the secondary battery pack to rise, which will cause the battery temperature to rise and cause overheating and other dangers.

Another object of the present invention is to provide a secondary battery end cover assembly, which has a simple structure, low manufacturing cost, high production efficiency, and quick and easy assembly.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A secondary battery end cap set, which is arranged on a secondary battery casing, is characterized in that the secondary battery end cap set includes:

A sealing plate is arranged at one end of the housing, and the sealing plate has a plurality of perforations; and

At least two terminal groups are respectively arranged in the through hole, each of the terminal groups includes: a conductive terminal and at least one locking piece, the conductive terminal is passed through the through hole, and the conductive terminal passes through one end of the sealing plate. There is a mounting part, the conductive terminal is provided with at least one fixing element, and a female thread is provided in the fixing element; a male thread is provided on the locking piece, so as to pass through the mounting part and be locked to the female thread of the fixing element middle.

In the secondary battery end cap set, wherein: the fixing element is made of stainless steel.

In the secondary battery end cap set, wherein: the locking member is made of stainless steel.

Said secondary battery end cap assembly, wherein: the fixing element is a screw cap.

The secondary battery end cover set, wherein: it also includes an insulating coating, which covers the sealing plate and the conductive terminal, and exposes the two ends of the conductive terminal, so as to fix the conductive terminal to the sealing plate superior.

Said secondary battery end cap set, wherein: the side of the sealing plate is also provided with an installation part, and the installation part is exposed outside the insulating envelope.

The secondary battery end cap set, wherein: the material of the insulating coating is insulating rubber.

Said secondary battery end cover set, wherein: the installation part is bent on the conductive terminal.

The secondary battery end cap set further includes a fixing seat, which is located under the installation part, and at least one fixing groove for fixing elements is provided on it to accommodate the fixing elements.

The secondary battery end cap set, wherein: the sealing plate is made of metal.

Said secondary battery end cover set, wherein: the sealing plate is also provided with a gas release valve, which is passed through the perforation for releasing the internal pressure of the secondary battery.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages that: the utility model can avoid thread damage caused by the difference in softness and hardness of the conductive terminal and the locking member due to the difference in materials, Or avoid deformation due to different thermal expansion coefficients, causing the conductive sheet to loosen, increasing the impedance value of the secondary battery pack, causing the battery temperature to rise and causing overheating and other dangers, and the utility model has the advantages of simple structure, low production cost, high production efficiency, and Assembly is quick and easy.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of an existing secondary battery pack;

Fig. 2 is a three-dimensional schematic diagram of the utility model installed in the secondary battery;

Fig. 3 is a three-dimensional schematic view of the utility model;

Fig. 4 is an exploded schematic diagram of components of the present utility model;

Fig. 5 is a three-dimensional schematic view of the secondary battery pack of the present invention.

Explanation of reference signs: 1-secondary battery end cover group; 10-sealing plate; 12-perforation; 14-installation part; 20-vent valve; 30-terminal group; 32-conductive terminal; 322-installation part; 34 -fixed seat; 342-fixed groove; 36-fixed element; 362-female thread; 38-fixer; 382-male thread; 40-insulation coating; 50-shell; 60-conductive sheet; 70-conductive terminal; 72-locking piece; 74-conductive sheet.

Detailed ways

Please refer to FIG. 2 to FIG. 4 , as shown in the figure, the secondary battery end cover set 1 of the present utility model is arranged on one end of a secondary battery disposed on the housing 50 , and the secondary battery end cover set 1 includes a sealing plate 10 It is made of metal, and there are a plurality of perforations 12 on the sealing plate 10 to respectively set a gas release valve 20 and two terminal groups 30. Each terminal group 30 includes a conductive terminal 32 pierced in the perforation 12 to connect with the secondary battery case. The electric core (not shown in the figure) in the body 50 is connected, and the electric core is respectively connected to the conductive terminal 32, to produce the positive and negative conductive terminal 32; One end of the conductive terminal 32 passing through the sealing plate 10 is provided with a mounting part 322, the mounting part 322 is bent on the conductive terminal 32, and a fixing seat 34 is provided under the mounting part 322, and at least one fixing element fixing groove 342 is provided in the fixing seat 34 to accommodate a fixing element 36, and a female part is arranged in the fixing element 36. Thread 362, in this embodiment, the fixing element 36 is a nut; and a locking member 38, the locking member 38 is provided with a male thread 382, and the locking member 38 passes through the mounting portion 322 and is locked to the female thread 362 of the fixing element 36 middle.

The materials of the fixing element 36 and the locking element 38 are all stainless steel, or hard metal with the same hardness, so when the locking element 38 locks the fixing element 36, the locking element 38 will not be locked due to the difference in material hardness. The threads are damaged when fastened to the fixing element 36 , or the fixing element 36 and the locking piece 38 are loosened or deformed due to different coefficients of thermal expansion.

Furthermore, since the fixing element 36 is additionally fixed on the conductive terminal 32, the conductive terminal can still use copper or aluminum with higher conductive efficiency as the conductive terminal 32, so that the utility model can still conduct electricity normally using the fixing element 36, and will not The overall conduction efficiency is reduced due to the addition of the fixing element 36 .

The conductive terminal 32 and the gas release valve 20 in the above-mentioned secondary battery end cap group 1 are all fixed on the sealing plate 10 with an insulating coating 40. The material of the insulating coating 40 can be insulating rubber, and the insulating coating 40 is coated on the on the sealing plate 10, and cover the conductive terminal 32 and the vent valve 20, so that the conductive terminal 32 and the vent valve 20 are fixed on the sealing plate 10, and expose the two ends of the conductive terminal 32 and the vent valve 20, and the sealing plate 10 An installation portion 14 is provided around the side, and the installation portion 14 is exposed outside the insulating coating, so that the sealing plate 10 can be installed in the housing 50 through the installation portion 14 by welding, laser welding or other fixing methods.

Next, please refer to FIG. 4 and FIG. 5, as shown in the figure, it illustrates how the secondary battery end cap assembly 1 of this embodiment uses the locking piece 38 and the fixing element 36 to lock the conductive sheet 60 on the conductive terminal 32, so as to A plurality of secondary batteries are connected in series through the conductive sheet 60 to form a battery pack. As shown in the figure, the example battery pack of this embodiment has three secondary batteries, namely a first secondary battery 80, a second secondary battery 81 and a third secondary battery 82, wherein the positive electrode of the first secondary battery 80 is connected to the The negative pole of the second secondary battery 81 is connected with a conductive strip 60, and then the positive pole of the second secondary battery 81 is connected with the negative pole of a third secondary battery 82 with a conductive strip 60, so as to utilize a plurality of conductive strips 60 to connect multiple The secondary batteries are connected in series to form a battery pack to generate greater battery power.

Since the fixing element 36 and the locking element 38 of this case are hard metals with the same hardness, when the locking element 38 locks the fixing element 36, the locking element 38 will not be locked to the fixing element due to the difference in hardness of the material. 36 can cause thread damage, and can avoid loosening or deformation of the fixing element 36 and the locking member 38 due to different thermal expansion coefficients, so as to cause the conductive sheet 60 to loosen, resulting in an increase in the impedance value of the battery pack, causing the battery temperature to rise and cause overheating and other dangers .

To sum up, the utility model can avoid thread damage due to the difference in softness and hardness of the conductive terminal and the locking member due to different materials, or avoid deformation due to different thermal expansion coefficients, resulting in loosening of the conductive sheet , so that the impedance value of the secondary battery pack increases, resulting in the danger of overheating caused by the temperature rise of the battery, and the utility model has the advantages of simple structure, low manufacturing cost, high production efficiency, and quick and easy assembly.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the protection scope of the present utility model.

Claims (11)

1. a secondary battery end cover group, be located on the housing of a secondary cell, it is characterized in that, this secondary battery end cover group comprises:

One shrouding is arranged at an end of this housing, has plurality of through holes on this shrouding; And

At least two terminal group, be arranged at respectively in this perforation, each this terminal group comprises: a conducting terminal and at least one locking part, this conducting terminal is arranged in this perforation, the end that this conducting terminal passes this shrouding is provided with an installation portion, this conducting terminal is provided with at least one retaining element, in this retaining element and be provided with a negative thread; This locking part is provided with a pin thread, is locked in this negative thread of this retaining element to pass this installation portion.

2. secondary battery end cover group according to claim 1, it is characterized in that: the material of this retaining element is stainless steel.

3. secondary battery end cover group according to claim 2, it is characterized in that: the material of this locking part is stainless steel.

4. secondary battery end cover group according to claim 1, it is characterized in that: this retaining element is nut.

5. secondary battery end cover group according to claim 1 is characterized in that: also comprise an insulation coating, it is coated on this shrouding and this conducting terminal, and the two ends of exposing this conducting terminal, so that this conducting terminal is fixed on this shrouding.

6. secondary battery end cover group according to claim 5, it is characterized in that: the side of this shrouding also is equipped with an installing department, and this installing department exposes outside this insulation coating.

7. secondary battery end cover group according to claim 5, it is characterized in that: the material of this insulation coating is electro-insulating rubber.

8. secondary battery end cover group according to claim 1, it is characterized in that: this installation portion bends on this conducting terminal.

9. secondary battery end cover group according to claim 8, it is characterized in that: also comprise a holder, it is positioned under this installation portion, which is provided with at least one retaining element holddown groove, with accommodating this retaining element.

10. secondary battery end cover group according to claim 1, it is characterized in that: the material of this shrouding is metal material.

11. secondary battery end cover group according to claim 1 is characterized in that: this shrouding also is provided with a gas bleeder valve, it is arranged in this perforation, for discharging this secondary cell section internal pressure.

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