CN201365119Y

CN201365119Y - Power battery protection device

Info

Publication number: CN201365119Y
Application number: CNU2009200502553U
Authority: CN
Inventors: 王鹏; 邓平华; 陈卫; 孙作勇
Original assignee: Dongguan Amperex Electronics Technology Ltd; Dongguan Amperex Technology Ltd
Current assignee: Dongguan Amperex Electronics Technology Ltd; Dongguan Amperex Technology Ltd
Priority date: 2009-01-16
Filing date: 2009-01-16
Publication date: 2009-12-16
Anticipated expiration: 2019-01-16

Abstract

A power battery protection device includes a terminal, a busbar and a fuse, wherein the terminal and the busbar are electrically connected via the fuse. Compared with the prior art, the power battery protection device of the utility model is provided with a fuse between the terminal and the busbar. When a short circuit occurs in the power battery, causing the current in the entire circuit to exceed the maximum safe current, the fuse will be melted and disconnected, thereby timely cutting off the current of the entire circuit, thereby avoiding safety accidents and protecting the power battery and electronic equipment from damage.

Description

The electrokinetic cell protective device

Technical field

The utility model relates to a kind of electrokinetic cell protective device, the especially a kind of protective device that can protect electrokinetic cell to be without prejudice when short circuit.

Background technology

Development along with modern society, increasing electronic equipment, especially various mobile devices such as video camera, notebook computer, portable DVD player and digital camera etc., application has more and more widely all been arranged, because it is portable that these equipment have mostly, therefore, all needing to use electrokinetic cell is power supply, and high-energy power battery preferably, as lithium ion battery etc.Though high-energy power battery can provide energy source for electronic equipment at any time; but owing to reasons such as the use of high-energy chemistry material and concentration of energy; the security performance of high-energy battery but can not get satisfactory solution always; such as; electrokinetic cell is short-circuited owing to being squeezed, colliding or running into other fortuitous events through regular meeting in charging, discharge or use.During short circuit, electrokinetic cell can produce very big electric current, and the accumulation of heat may cause electrokinetic cell that burning even blast take place, and works the mischief for simultaneously electronic equipment and user thereof.

In view of this, necessaryly provide a kind of electrokinetic cell protective device, make electrokinetic cell when short circuit, above-mentioned security incident can not take place.

The utility model content

The purpose of this utility model is: a kind of electrokinetic cell protective device that can protect electrokinetic cell to be without prejudice when short circuit is provided.

For solving the problems of the technologies described above, the utility model provides a kind of electrokinetic cell protective device, and it comprises binding post, bus-bar and safety plate, and described binding post and bus-bar are electrically connected via safety plate.

As a kind of improvement of the utility model electrokinetic cell protective device, described safety plate comprises two plates that fully contact with binding post and bus-bar respectively, and two plates of safety plate are connected by a fuse-link.

As a kind of improvement of the utility model electrokinetic cell protective device, the cross-sectional area of fuse-link is not more than 4 square millimeters.

As a kind of improvement of the utility model electrokinetic cell protective device, described safety plate is installed on the safety plate support that insulating material makes, and the safety plate spacer support frame only is electrically connected the two between binding post and bus-bar by safety plate.

As a kind of improvement of the utility model electrokinetic cell protective device, described safety plate support is provided with the main body between two plates that are interval in safety plate, and the side edge of main body is offered a groove, and the fuse-link of described safety plate is contained in the described groove.

A kind of improvement as the utility model electrokinetic cell protective device; the main body of described safety plate support is provided with two annular boss; offer through hole respectively on two plates of described safety plate, the annular boss of safety plate support is contained in respectively in the corresponding through hole of plates of safety plate.

A kind of improvement as the utility model electrokinetic cell protective device; described binding post comprises electric current exit and the less link of diameter that diameter is bigger; described safety plate support and bus-bar all are sheathed on the link of described binding post, and are fixed by nut.

A kind of improvement as the utility model electrokinetic cell protective device is provided with insulating trip between described nut and the bus-bar.

As a kind of improvement of the utility model electrokinetic cell protective device, an end of described binding post is electrically connected with bus-bar by safety plate, and the other end is connected with the circuit of inside battery.

As a kind of improvement of the utility model electrokinetic cell protective device, an end of described bus-bar is electrically connected with binding post by safety plate, and the other end is connected with the circuit of outside batteries.

With respect to prior art; the utility model electrokinetic cell protective device is provided with safety plate between binding post and bus-bar; when electrokinetic cell is short-circuited; when causing electric current in the entire circuit to surpass maximum safe current; safety plate promptly can be melted the back and disconnect; thereby in time cut off the electric current of entire circuit, when avoiding security incident, also can protect electrokinetic cell and electronic equipment not to suffer damage.

Description of drawings

Below in conjunction with accompanying drawing and each embodiment, the utility model and useful technique effect thereof are elaborated, wherein:

Fig. 1 is the user mode schematic diagram of the utility model electrokinetic cell protective device.

Fig. 2 is the enlarged drawing of A part among Fig. 1.

Fig. 3 is the stereogram of the safety plate in the electrokinetic cell protective device shown in Figure 1.

Fig. 4 is the stereogram of the safety plate support of the utility model electrokinetic cell protective device.

Embodiment

See also Fig. 1 and Fig. 2, the utility model electrokinetic cell protective device comprises binding post 6, safety plate 5, safety plate support 4, bus-bar 3, insulating trip 2 and nut 1.

Wherein, bus-bar 3 is a laminated structure, and the one end offers through hole, is used for being connected with the binding post 6 of electrokinetic cell 80, and the other end then is connected (figure does not show) with electrokinetic cell 80 circuit external.

Binding post 6 is positive terminals of electrokinetic cell 80, and the one end is electrically connected with bus-bar 3 as shown in the figure, and the other end then is connected (figure does not show) with the positive plate of electrokinetic cell 80.Binding post 6 is the step cylinder, comprises electric current exit 62 and the less link 64 of diameter that diameter is bigger, and the tip of electric current exit 62 is electrically connected with positive plate in the inside of electrokinetic cell 80.The link 64 of binding post 6 is provided with screw thread 66.

In order to guarantee that security incident takes place because of electric current is excessive electrokinetic cell 80 Shi Buhui that is short-circuited, the utility model is provided with a safety plate 5 between bus-bar 3 and binding post 6.See also Fig. 3, safety plate 5 comprises that 52,54, two plates of two plates parallel to each other 52,54 connect by a slice fuse-link 56, and the cross-sectional area of fuse-link 56 is very little, is advisable to be not more than 4 square millimeters.The area sizableness of two

plates

52,54 is respectively applied for bus-bar 3 and fully is connected with binding post 6.All offer a through hole on each

plates

52,54, the through-hole diameter sizableness of the diameter of through hole and bus-bar 3, their diameter are all greater than the diameter of the link 64 of binding post 6.Need to prove that before installation, two

plates

52,54 of safety plate 5 are not parallel to each other, but connect at an angle at fuse-link 56 places.

See also Fig. 4, safety plate support 4 is made by insulating material, and main body 42 is shaped as the lamellar body of offering through hole 43, and the link 64 that the diameter of through hole 43 can be held binding post 6 just passes, and closely cooperates with the outer wall of link 64.If necessary, can be provided with on the through-hole wall of safety plate support 4 and the suitable screw thread of the screw thread 66 of link 64 outer walls.The fuse-link 56 of the thickness of main body 42 and safety plate 5 is highly suitable, and its two sides is respectively equipped with an annular boss 44,46 coaxial with through hole 43.The external diameter of two boss 44,46 is identical, and all the through-hole diameter with the

plates

52,54 of safety plate 5 is suitable, is used for link 64 insulation with binding post 6 of

plates

52,54 and bus-bar 3.The side edge of main body 42 also is provided with a groove 48.

The lamellar body 22 of insulating trip 2 is provided with through hole, and the link 64 that the diameter of through hole can be held binding post 6 just passes, and closely cooperates with the outer wall of link 64.An end face of insulating trip 2 outwards convexes with annular protrusion 24, and the external diameter size of annular protrusion 24 is equal to or slightly less than the through-hole diameter size of bus-bar 3, therefore can be used at interval between the link 64 and bus-bar 3 of binding post 6, so that with the two insulation.

Be provided with screw thread in the nut 1, can be suitable with the link 64 of binding post 6.

During installation, as long as a slice plates 52 of safety plate 5 are sheathed on one of them boss 44 of safety plate support 4, and fuse-link 56 is aimed at the groove 48 of safety plate supports 4, afterwards at fuse-link 56 places bending safety plate 5, make it become as shown in Figure 3 shape, another sheet plates 54 can be sheathed on another boss 46 of safety plate support 4, thereby safety plate 5 is installed on the safety plate support 4.At this moment, the fuse-link 56 of safety plate 5 is contained in groove 48 internal fixation of

safety plate support

4, and 42 of the main bodys of safety plate support 4 are contained between two

plates

52,54 of safety plate 5 and play the spacer insulator effect.Safety plate support 4, bus-bar 3, insulating trip 2 are sheathed on the link 64 of binding post 6 successively, at last nut 1 are tightened on link 64, safety plate support 4, safety plate 5, bus-bar 3, insulating trip 2 are compacted and be fixed in binding post 6.At this moment, 6 of bus-bar 3 and binding posts are connected by safety plate 5, insulate fully in other places.

After using this protective device, during electrokinetic cell 80 discharges, electric current can only flow to bus-bar 3 by safety plate 5 from binding post 6.In case the inside or the outside of electrokinetic cell 80 are short-circuited; when causing electric current in the entire circuit to surpass maximum safe current; the fuse-link 56 of safety plate 5 promptly can be melted the back and disconnect; thereby in time cut off the electric current of entire circuit; when avoiding that security incident takes place, also can protect electrokinetic cell 80 and electronic equipment not to suffer damage.

Certainly, in other embodiments, binding post 6 can be a negative terminal also, that is to say, the utility model electrokinetic cell protective device also can be installed on the negative pole of electrokinetic cell 80.

The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although used some specific terms in this specification, these terms do not constitute any restriction to the utility model just for convenience of description.

Claims

1. A power battery protection device, which includes a terminal post and a bus bar, characterized in that: the power battery protection device further includes a safety plate, and the terminal post and the bus bar are electrically connected through the safety plate.

2. The power battery protection device according to claim 1, characterized in that: the insurance sheet includes two sheet-shaped bodies that are in full contact with the terminal and the bus bar respectively, and the two sheet-shaped bodies of the insurance sheet are fused by one body connection.

3. The power battery protection device according to claim 2, wherein the cross-sectional area of the fuse link is not greater than 4 square millimeters.

4. The power battery protection device according to claim 2 or 3, characterized in that: the safety plate is installed on a safety plate bracket made of insulating material, and the safety plate bracket is spaced between the terminal post and the bus bar. Make the two electrically connected only through the fuse.

5. The power battery protection device according to claim 4, characterized in that: the safety plate bracket is provided with a main body spaced between the two plates of the safety plate, and a groove is opened on the side edge of the main body , the fuse body of the safety plate is accommodated in the groove.

6. The power battery protection device according to claim 5, characterized in that two ring-shaped protrusions are provided on the main body of the safety plate bracket, and through holes are respectively opened on the two sheet-shaped bodies of the safety plate. The annular bosses of the insurance sheet holder are respectively accommodated in the corresponding through holes of the sheet body of the insurance sheet.

7. The power battery protection device according to claim 6, characterized in that: the terminal includes a current lead-out end with a larger diameter and a connection end with a smaller diameter, and the safety plate bracket and the bus bar are sleeved on the The connecting end of the binding post is compressed and fixed by a nut.

8. The power battery protection device according to claim 7, wherein an insulating sheet is provided between the nut and the bus bar.

9. The power battery protection device according to claim 1, wherein one end of the terminal is electrically connected to the busbar through a safety plate, and the other end is connected to the circuit inside the battery.

10. The power battery protection device according to claim 1, characterized in that: one end of the bus bar is electrically connected to the terminal through a safety plate, and the other end is connected to an external circuit of the battery.