CN213717030U - Connection piece, battery and battery module that battery was used - Google Patents
Connection piece, battery and battery module that battery was used Download PDFInfo
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- CN213717030U CN213717030U CN202022514465.2U CN202022514465U CN213717030U CN 213717030 U CN213717030 U CN 213717030U CN 202022514465 U CN202022514465 U CN 202022514465U CN 213717030 U CN213717030 U CN 213717030U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model belongs to the technical field of battery production and manufacture, in particular to a connecting sheet for a battery, a battery and a battery module, which comprises a pole connecting part (1); the two tab connecting parts (2) are respectively and fixedly and electrically connected with the two ends of the pole connecting part (1) in the width direction (Y); one of them utmost point ear connecting portion (2) with junction between utmost point post connecting portion (1) is formed with first fusing portion (3), another utmost point ear connecting portion (2) with junction between utmost point post connecting portion (1) is formed with second fusing portion (4), just the fusing time of first fusing portion (3) is less than the fusing time of second fusing portion (4). The utility model discloses can form the fusing time difference, give the time of battery management system reaction, avoid the car to lose the condition of power suddenly, help improving the security of using the battery.
Description
Technical Field
The utility model belongs to the technical field of the battery production is made, concretely relates to connection piece, battery and battery module that battery was used.
Background
Nowadays, secondary batteries have been widely used in the fields of consumer mobile phones, electric tools, medical electronics, and the like due to their excellent properties, and also show good application prospects in the fields of new energy vehicles, energy storage base stations, and the like. When a plurality of secondary batteries are connected into a module, the batteries are assembled in series or in parallel through a bus bar. In order to deal with the external short circuit, a fuse device is arranged in the connecting piece inside the battery, and when the external short circuit of the battery occurs, the connecting piece can be fused quickly, so that the battery is in an open circuit state.
When the secondary battery is assembled into a module in series or a battery pack is used on an automobile, the voltage of the whole system suddenly drops to zero when short circuit occurs, and the automobile suddenly loses power, so that safety accidents can be caused.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: aiming at the defects of the prior art, the connecting sheet for the battery is provided, the fusing time difference can be formed, the reaction time of a battery management system is given, the situation that the automobile loses power suddenly is avoided, and the improvement of the safety of the battery is facilitated.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a connecting sheet for a battery includes a post connecting portion; the at least two tab connecting parts are respectively and fixedly and electrically connected with the two ends of the pole connecting part in the width direction; one of them utmost point ear connecting portion with junction between the utmost point post connecting portion is formed with first fusing portion, another utmost point ear connecting portion with junction between the utmost point post connecting portion is formed with second fusing portion, just the fusing time of first fusing portion is less than the fusing time of second fusing portion.
Preferably, a cross-sectional area of the first fusing part is smaller than a cross-sectional area of the second fusing part.
Preferably, a ratio of a cross-sectional area of the second fusing part to a cross-sectional area of the first fusing part is greater than or equal to 1.2.
Preferably, a cross-sectional area of the first fuse portion or a cross-sectional area of the second fuse portion is 1mm2-20mm2。
Preferably, the first fusing portion and the second fusing portion are each provided with a flux coating.
Preferably, in the height direction, the first fusing part and the second fusing part are provided with through holes, notches or grooves.
Preferably, the through hole or the groove is disposed on a surface of the first fusing part or the second fusing part, and the notch is disposed on two sides of the first fusing part or the second fusing part in a length direction.
Preferably, the distance between the first fusing part and the tab connecting part is 1mm to 10 mm.
Preferably, a distance between the first fusing part and the tab connecting part is 3 mm.
Preferably, the thickness of the connecting sheet is 0.1mm-5 mm.
Preferably, the pole connecting part and the tab connecting part are both of a flat structure, and the connecting sheet is made of the same material as a current collecting material of a pole piece of the battery cell electrically connected with the connecting sheet.
A second object of the utility model is to provide a battery, reach the connection piece as above-mentioned battery usefulness including top cap piece, utmost point post, electric core, casing, utmost point post install in the top cap piece, electric core holding in the casing, top cap piece lid connect in the casing, electric core is provided with utmost point ear, utmost point post through the welding with utmost point post connecting portion connect, utmost point ear through the welding with utmost point ear connecting portion connect.
The utility model discloses a third aim at provides a battery module, including end plate, curb plate, busbar and a plurality of as above-mentioned battery, end plate and curb plate form holding a plurality of the space of battery, a plurality of the battery passes through the busbar is established ties or is parallelly connected.
The utility model has the advantages that the utility model comprises a pole connecting part; the at least two tab connecting parts are respectively and fixedly and electrically connected with the two ends of the pole connecting part in the width direction; one of them utmost point ear connecting portion with junction between the utmost point post connecting portion is formed with first fusing portion, another utmost point ear connecting portion with junction between the utmost point post connecting portion is formed with second fusing portion, just the fusing time of first fusing portion is less than the fusing time of second fusing portion. Because the soft connecting sheet is arranged in the battery for coping with external short circuit, when the external short circuit of the battery occurs, the soft connecting sheet can be rapidly fused to enable the battery to be in an open circuit state, when the secondary battery is serially assembled into a module or a battery pack to be applied to an automobile, the voltage of the whole system is suddenly reduced to zero when the short circuit occurs, the automobile suddenly loses power and can cause safety accidents, therefore, a first fusing part is formed at the joint between one tab connecting part and the pole connecting part, a second fusing part is formed at the joint between the other tab connecting part and the pole connecting part, the fusing time of the first fusing part is shorter than that of the second fusing part, and during the short circuit process, the first fusing part is firstly fused, while the fusing time of the second fusing part is longer, and the second fusing part is not completely fused, at this time, the battery can not generate direct short circuit and the voltage drop is zero, after second fusing portion fuses, the voltage drop is zero, the time difference of first fusing portion and second fusing portion fusing gives battery management system reaction time, it leads to the incident to prevent that electric automobile operation in-process from losing power suddenly, wherein, the end connection of utmost point post connecting portion is in battery utmost point post, two utmost point ear connecting portion connect respectively in the utmost point ear of electric core, and utmost point ear connecting portion and the fixed electricity of post connecting portion are connected, realize establishing ties between the utmost point ear of battery utmost point post and electric core, the connection piece lies in between the plastic part of top cap piece below and the main part of electric core along the direction of height. The utility model discloses can form the fusing time difference, give the time of battery management system reaction, avoid the car to lose the condition of power suddenly, help improving the security of using the battery.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a fifth embodiment of the present invention.
Fig. 5 is a schematic structural view of the fifth embodiment of the present invention after being developed.
Fig. 6 is a schematic structural diagram of a ninth embodiment of the present invention.
Fig. 7 is a voltage graph of a battery module of a conventional design.
Fig. 8 is a voltage curve diagram of the battery module designed according to the present embodiment.
Wherein the reference numerals are as follows:
1-pole connecting part;
2-tab connection;
3-a first fuse part;
4-a second fuse portion;
5-a through hole;
6-notch;
7-a groove;
8-top cover sheet;
9-pole column;
10-electric core; 101-pole ear;
20-a housing;
30-an end plate;
40-side plates;
50-a busbar;
x-length direction;
y-width direction;
z-height direction.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to fig. 1 to 8, but the present invention is not limited thereto.
Implementation mode one
A connecting sheet for a battery includes a post connecting portion 1; at least two tab connecting parts 2 which are respectively and fixedly and electrically connected with two ends of the pole connecting part 1 in the width direction Y; the junction between one of them utmost point ear connecting portion 2 and utmost point post connecting portion 1 is formed with first fusing portion 3, and the junction between another utmost point ear connecting portion 2 and utmost point post connecting portion 1 is formed with second fusing portion 4, and the fusing time of first fusing portion 3 is less than the fusing time of second fusing portion 4.
Because the soft connecting sheet is provided with the fuse device inside the battery for coping with the external short circuit, when the external short circuit of the battery occurs, the soft connecting sheet can be quickly fused to enable the battery to be in an open circuit state, when the secondary battery is serially assembled into a module or a battery pack to be applied to an automobile, the voltage of the whole system suddenly drops to zero when the short circuit occurs, the automobile suddenly loses power and safety accidents can be caused, therefore, as shown in figure 1, a first fusing part 3 is formed at the joint between one tab connecting part 2 and one post connecting part 1, a second fusing part 4 is formed at the joint between the other tab connecting part 2 and the post connecting part 1, the fusing time of the first fusing part 3 is shorter than that of the second fusing part 4, during the short circuit, the first fusing part 3 is fused firstly, and the second fusing part 4 is fused longer, not fusing completely, direct short circuit and the condition that the voltage drop is zero can not appear in the battery this moment, after second fusing part 4 melts, the voltage drop is zero, the time difference of first fusing part 3 and the 4 fusing of second fusing part gives battery management system reaction time, prevent that electric automobile operation in-process from losing power suddenly and leading to the incident, wherein, the end connection of utmost point post connecting portion 1 is in battery utmost point post 9, two utmost point post connecting portion 2 connect respectively in the utmost point ear 101 of electric core 10, and utmost point post connecting portion 2 and the fixed electricity of utmost point post connecting portion 1 are connected, realize establishing ties between the utmost point ear 101 of battery utmost point post 9 and electric core 10, the connection piece lies in between the plastic part of top cap piece 8 below and the main part of electric core 10 along direction.
The battery has two utmost point posts 9, is first utmost point post, second utmost point post respectively, all sets up on top cap piece 8, and first utmost point post can be positive post also can be negative pole post, and correspondingly, the second utmost point post is negative pole post or positive post. When the number of the battery cells 10 in the battery is large or the tabs of the battery cells 10 are short, connecting sheets are used in the assembly process and are divided into first connecting sheets and second connecting sheets. For example, each of the battery cells 10, the first tab and the second tab is at least two, each of the battery cells 10 is connected with the first tab and the second tab, and when the first tab and the second tab are at least two, the two first tabs can be welded to the tab connecting portions 2 on two sides of the connecting sheet, for example, the folding portions of the two first tabs are respectively located on the tab connecting portions 2 on two sides of the connecting sheet, and the welding portion of the first tab is connected with the first pole through the first connecting sheet. The second utmost point ear all is connected with the second utmost point post through the second connection piece, has realized improving battery internal connection's stability.
Specifically, when the battery is overcharged, the current inside the battery increases; and the cross-sectional area of first fusing portion 3 is less than the cross-sectional area of second fusing portion 4, make the fusing time of first fusing portion 3 be less than the fusing time of second fusing portion 4, first fusing portion 3 can fuse under the effect of increased electric current, thereby the electric connection of the first utmost point ear of disconnection part and first utmost point post, also break off the back when second fusing portion 4, cut off the charging circuit, prevent to initiate the incident, and simultaneously, the time difference of first fusing portion 3 and the fusing of second fusing portion 4 gives battery management system reaction time, prevent to lose power suddenly in the electric automobile operation process and lead to the incident. However, the present invention is not limited thereto, and the melting point of the fusing part can be changed by changing the material of the first fusing part 3 and the second fusing part 4 on the premise that the cross sectional area of the first fusing part 3 is the same as that of the second fusing part 4, even if the fusing time of the first fusing part 3 is shorter than that of the second fusing part 4.
In this embodiment, referring to fig. 5, the first pole is used as the positive electrode, the second pole is used as the negative electrode, the first connecting piece and the second connecting piece are designed to be similar to the shape of the Chinese character 'shan', the first connecting piece is provided with the fusing part, the second connecting piece is also provided with the pole connecting part 1 and the pole connecting part 2, but the fusing part is not provided, but the utility model discloses not so limited, in order to satisfy different battery structures and the protection requirement of breaking, the fusing part can also be provided at the second connecting piece.
In the connection sheet for a battery according to the present invention, in the height direction Z, the first fusing portion 3 and the second fusing portion 4 are both provided with the through hole 5, and the through hole 5 is provided on the surface of the first fusing portion 3 or the second fusing portion 4. In this embodiment, the through hole 5 penetrates through the upper surface and the lower surface of the first fuse part 3 or the second fuse part 4 in the height direction Z, so that the cross sectional area of the first fuse part 3 and the cross sectional area of the second fuse part 4 are reduced, in order to realize that the cross sectional area of the first fuse part 3 is smaller than the cross sectional area of the second fuse part 4, the size of the through hole 5 located in the first fuse part 3 is larger than the size of the through hole 5 located in the second fuse part 4, and the through hole 5 can be designed to be square, circular or oval according to the actual battery structure and market requirements, but the utility model discloses this does not limit, and a notch 6 or a groove 7 can also be adopted, for example, the first fuse part 3 is provided with the through hole 5, and the second fuse part 4 is provided with a notch 6 or a groove 7, so that the cross sectional area of the first fuse part 3 is smaller than the cross sectional area.
In a connection tab for a battery according to the present invention, a ratio of a cross-sectional area of the second fusion portion 4 to a cross-sectional area of the first fusion portion 3 is 1.2 or more, and the cross-sectional area of the first fusion portion 3 or the cross-sectional area of the second fusion portion 4 is 1mm2. The ratio of the cross sectional area of the second fusing part 4 to the cross sectional area of the first fusing part 3 is limited, so that the second fusing part 4 and the first fusing part 3 are prevented from fusing at the same time due to the fact that the difference between the cross sectional area of the second fusing part 4 and the cross sectional area of the first fusing part 3 is too small, reaction time cannot be given to a battery management system, power is suddenly lost in the running process of the electric automobile, and safety accidents are caused. Wherein, the user can adjust the cross-sectional area and the cross-sectional area of the second fusing part 4 according to the requirements of the actual fusing time difference and the reaction time of the battery management systemThe ratio of the cross-sectional areas of the first fusing parts 3 is changed to change the time difference between the fusing of the second fusing parts 4 and the first fusing parts 3, which is helpful for improving the application range of the connecting piece. The cross-sectional area of first fusing portion 3 or the cross-sectional area of second fusing portion 4 are the minimum, prevent that the cross-sectional area undersize, lead to first fusing portion 3 or second fusing portion 4 to trigger the fusing easily, and less electric current can lead to first fusing portion 3 or the fusing of second fusing portion 4 promptly, influences the life of connection piece.
In the connection sheet for a battery according to the present invention, the distance between the first fusing part 3 and the tab connecting part 2 is 1 mm. It is minimum to inject the distance between first fusing portion 3 and utmost point ear connecting portion 2, prevent that first fusing portion 3 and utmost point ear connecting portion 2 distance are too near, make the regional undersize of connection between first fusing portion 3 and utmost point ear connecting portion 2, not only lead to still overlap joint on utmost point ear connecting portion 2 after 3 fusing of first fusing portion, influence 3 normal disconnection of first fusing portion, still lead to the mechanical strength decline of junction, cause the connection piece to take place the condition of buckling, can also increase the intensity in fusing area, avoid the connection piece fracture when receiving the vibration. In addition, the distance between the second fusing part 3 and the tab connecting part 2 can be limited, and the fusing function of the connecting sheet can be satisfied.
In the connection sheet for a battery according to the present invention, the thickness of the connection sheet is 0.1 mm. The thickness of injecing the connection piece is the minimum, prevents the thickness undersize of connection piece, leads to the mechanical strength of junction to descend, causes the connection piece to take place the condition of buckling, can also guarantee the intensity of connection piece, avoids the connection piece fracture when receiving the vibration.
In the connection piece that according to the utility model discloses a battery was used, utmost point post connecting portion 1 and utmost point ear connecting portion 2 are flat structure, and the connection piece material is the same rather than the mass flow material of the electric core 10's of electricity connection pole piece. The pole connecting part 1 and the lug connecting part 2 both adopt a flat structure, which is beneficial to simplifying the production process of the pole connecting part 1 and the lug connecting part 2, thereby reducing the production cost of the connecting sheet; the connecting sheet is made of the same current collecting material as the pole pieces of the battery cell 10 electrically connected thereto, i.e. the same metal material as the positive and negative pole pieces, for example, the connecting sheet connected to the negative pole piece is made of copper, which helps to reduce the voltage difference between the two.
The utility model discloses a theory of operation is:
the junction between one of them utmost point ear connecting portion 2 and utmost point post connecting portion 1 is formed with first fusing portion 3, the junction between another utmost point ear connecting portion 2 and the utmost point post connecting portion 1 is formed with second fusing portion 4, and the fusing time of first fusing portion 3 is less than the fusing time of second fusing portion 4, in the short circuit process, the fusing time of first fusing portion 3 is shorter, take place fusing earlier, and the fusing time of second fusing portion 4 is longer, complete fusing not, direct short circuit and the condition that the voltage drop is zero can not appear in the battery this moment, until second fusing portion 4 melts the back, the voltage drop is zero, the time difference of first fusing portion 3 and the fusing of second fusing portion 4 gives battery management system reaction time, prevent that electric automobile operation in-process from losing power suddenly and leading to the incident.
Second embodiment
The difference from the first embodiment is that: referring to fig. 2, in the height direction Z of the present embodiment, the first fuse portion 3 and the second fuse portion 4 are provided with notches 6, the notches 6 are provided on both sides of the first fuse portion 3 or the second fuse portion 4 in the length direction X, and the cross-sectional area of the first fuse portion 3 or the cross-sectional area of the second fuse portion 4 is 20mm2The distance between the first fusing part 3 and the tab connecting part 2 is 10mm, and the thickness of the connecting piece is 5 mm. In this embodiment, the notch 6 is disposed on two sides of the first fuse portion 3 or the second fuse portion 4 in the length direction X, so that the cross-sectional area of the first fuse portion 3 and the cross-sectional area of the second fuse portion 4 are reduced, in order to realize that the cross-sectional area of the first fuse portion 3 is smaller than the cross-sectional area of the second fuse portion 4, the size of the notch 6 disposed on the first fuse portion 3 is larger than the size of the notch 6 disposed on the second fuse portion 4, and according to the actual battery structure and market requirements, the notch 6 is only disposed on one side or two sides of the first fuse portion 3 or the second fuse portion 4 in the length direction X, and the notch 6 is designed to be U-shaped, square, semicircular or semi-elliptical, but the utility model discloses this is not limited thereto, and also can adopt the groove 7 or the through hole 5, for example, the first fuse portion 3 is disposed with the notch 6, and the second fuse portion 4 is disposed with the groove 7 or the throughThe cross-sectional area of the broken part 3 is smaller than that of the second fusing part 4; the cross sectional area of the first fusing part 3 or the cross sectional area of the second fusing part 4 is limited to be the maximum value, so that the situation that the fusing time of the first fusing part 3 or the second fusing part 4 is too long due to the overlarge cross sectional area is prevented, namely, the first fusing part 3 or the second fusing part 4 can be fused only by a large current, the safety of a battery is influenced, and the production cost is increased; prescribe the distance between first fusing portion 3 and utmost point ear connecting portion 2 to be the maximum value, prevent that first fusing portion 3 and utmost point ear connecting portion 2 distance are too far away, make the junction area between first fusing portion 3 and utmost point ear connecting portion 2 too big, encroach on the horizontal work piece of battery, lead to the connection piece to occupy bigger space on width direction Y, still lead to the whole manufacturing cost of connection piece to rise, prescribe the thickness of connection piece to be the maximum value, prevent that the thickness of connection piece is too big, lead to manufacturing cost to rise, avoid the connection piece to excessively encroach on the inside space of battery simultaneously, help reducing the whole thickness of battery top cap.
Other structures are the same as those of the first embodiment, and are not described herein again.
Third embodiment
The difference from the first embodiment is that: referring to fig. 3, in the height direction Z of the present embodiment, each of the first fuse portion 3 and the second fuse portion 4 is provided with a groove 7, the groove 7 is provided on the surface of the first fuse portion 3 or the second fuse portion 4, and the cross-sectional area of the first fuse portion 3 is 4mm2The distance between the first fusing part 3 and the tab connecting part 2 was 3 mm. In this embodiment, the groove 7 is formed on the upper surface or the lower surface of the first fuse portion 3 or the second fuse portion 4 in the height direction Z, so that the cross sectional area of the first fuse portion 3 and the cross sectional area of the second fuse portion 4 are reduced, in order to realize that the cross sectional area of the first fuse portion 3 is smaller than the cross sectional area of the second fuse portion 4, the depth or the size of the groove 7 located in the first fuse portion 3 is larger than the depth or the size of the groove 7 located in the second fuse portion 4, and the groove 7 can be designed to be square, semicircular or semi-elliptical according to the actual battery structure and market demand, but the present invention is not limited thereto, and the notch 6 or the through hole 5 can also be adopted, for example, the first fuse portion 3 is provided with the groove 7, and the second fuse portion 4 is provided with the notch 6 orA through hole 5, which satisfies the condition that the cross-sectional area of the first fusing part 3 is smaller than that of the second fusing part 4; the cross sectional area of the first fusing part 3 or the cross sectional area of the second fusing part 4 is limited to be an intermediate value, so that the cross sectional area is prevented from being too large, the production cost is reduced, the first fusing part 3 or the second fusing part 4 is ensured to be fused under a preset current, and the reaction time of the first fusing part 3 or the second fusing part 4 is prolonged; prescribe the distance between first fusing portion 3 and utmost point ear connecting portion 2 and be the median, satisfy and reduce the whole manufacturing cost of connection piece, not only avoid still overlap joint on utmost point ear connecting portion 2 after 3 fuses of first fusing portion, influence the condition of 3 normal disconnection of first fusing portion, still reserve out sufficient space on width direction Y, prevent that utmost point ear is direct to contact with utmost point ear connecting portion 1.
Other structures are the same as those of the first embodiment, and are not described herein again.
Embodiment IV
The difference from the first embodiment is that: the first fuse portion 3 and the second fuse portion 4 are each provided with a flux coating. Under the condition that the cross sectional area of first fuse portion 3 and the cross sectional area of second fuse portion 4 are the same, first fuse portion 3 can set up more fluxing agent coating, and second fuse portion 4 sets up relatively less fluxing agent coating for the fusing time of first fuse portion 3 is less than the fusing time of second fuse portion 4, but the utility model discloses do not so limit, only first fuse portion 3 sets up the fluxing agent coating, and second fuse portion 4 does not have the fluxing agent coating, and it can to satisfy the fusing time of first fuse portion 3 and be less than the fusing time of second fuse portion 4.
Other structures are the same as those of the first embodiment, and are not described herein again.
Fifth embodiment
The utility model provides a battery, includes top cap piece 8, utmost point post 9, electric core 10, casing 20 and like the connection piece that embodiment mode one's battery was used, utmost point post 9 is installed in top cap piece 8, and electric core 10 holding is in casing 20, and top cap piece 8 lid connects in casing 20, and electric core 10 is provided with utmost point ear 101, and utmost point post 9 is connected with utmost point post connecting portion 1 through the welding, and utmost point ear 101 is connected with utmost point ear connecting portion 2 through the welding.
It should be noted that: referring to fig. 4 and 5, the battery has two poles 9, which are respectively a first pole, a second pole, and are all disposed on the top cover plate 8, each battery cell 10 is connected with a first pole ear and a second pole ear, when the first pole ear and the second pole ear are both at least two, they can be welded at the pole ear connection portions 2 on both sides of the connection piece, the first pole ear is connected with the first pole through the first connection piece, the second pole ear is connected with the second pole through the second connection piece, so as to improve the stability of the internal connection of the battery, concretely, the first pole and the second pole are both connected with the pole ear connection portions 1 through laser welding, and the first pole ear and the second pole are both connected with the pole ear connection portions 2 through ultrasonic welding. In the short circuit process, the fusing time of first fusing part 3 is short, takes place fusing earlier, and the fusing time of second fusing part 4 is longer, and complete fusing is not, and direct short circuit and the condition that the voltage drop is zero can not appear in the battery this moment, and the back is fused to second fusing part 4, and the voltage drop is zero, and the time difference of first fusing part 3 and the fusing of second fusing part 4 gives battery management system reaction time.
Sixth embodiment
The utility model provides a battery, includes top cap piece 8, utmost point post 9, electric core 10, casing 20 and like the connection piece that embodiment mode two's battery was used, utmost point post 9 is installed in top cap piece 8, and electric core 10 holding is in casing 20, and top cap piece 8 lid connects in casing 20, and electric core 10 is provided with utmost point ear 101, and utmost point post 9 is connected with utmost point post connecting portion 1 through the welding, and utmost point ear 101 is connected with utmost point ear connecting portion 2 through the welding.
It should be noted that: the battery cell 10 includes a positive plate, a diaphragm and a negative plate, which can be sequentially stacked and wound, wherein the positive plate includes a positive current collector and a positive active material coated on the surface of the positive current collector, and the negative plate includes a negative current collector and a negative active material coated on the surface of the negative current collector. First utmost point ear is connected in the anodal mass flow body, and the second utmost point ear is connected in the negative pole mass flow body, and the edge of the anodal mass flow body can have the blank area that is not covered by anodal active material, and first utmost point ear can be directly formed through cutting the blank area. Similarly, the second utmost point ear can be directly through cutting the blank area of negative pole mass flow body, and in addition, first utmost point ear and second utmost point ear also can be fixed in the blank area of positive plate and negative pole piece respectively through the welding, can adopt laser welding's mode, are connected first utmost point ear and first utmost point post, and the second utmost point ear is connected with the second utmost point post.
Seventh embodiment
The utility model provides a battery, includes top cap piece 8, utmost point post 9, electric core 10, casing 20 and like the connection piece that embodiment mode three's battery was used, utmost point post 9 is installed in top cap piece 8, and electric core 10 holding is in casing 20, and top cap piece 8 lid connects in casing 20, and electric core 10 is provided with utmost point ear 101, and utmost point post 9 is connected with utmost point post connecting portion 1 through the welding, and utmost point ear 101 is connected with utmost point ear connecting portion 2 through the welding.
Embodiment eight
The utility model provides a battery, includes top cap piece 8, utmost point post 9, electric core 10, casing 20 and like the connection piece that embodiment mode four's battery was used, utmost point post 9 is installed in top cap piece 8, and electric core 10 holding is in casing 20, and top cap piece 8 lid connects in casing 20, and electric core 10 is provided with utmost point ear 101, and utmost point post 9 is connected with utmost point post connecting portion 1 through the welding, and utmost point ear 101 is connected with utmost point ear connecting portion 2 through the welding.
Ninth embodiment
A battery module comprises an end plate 30, a side plate 40, a bus bar 50 and a plurality of batteries according to the fifth embodiment, wherein the end plate 30 and the side plate 40 form a space for accommodating the batteries, and the batteries are connected in series or in parallel through the bus bar 50.
It should be noted that: referring to fig. 6, when a plurality of batteries are connected into a module, the batteries are assembled in series or in parallel through the bus bars 50, specifically, half of the batteries are connected in series, and the other half of the batteries are connected in parallel, and the number of the batteries connected in parallel can be adjusted according to actual battery modules and market demands. The end plate 30 and the side plate 40 form a frame for accommodating a plurality of batteries, and the battery pack further comprises a bottom plate for supporting a plurality of batteries.
Referring to fig. 7 and 8, in the battery module with the conventional design, the voltage drops to 10.5V at the beginning of the short circuit, and the voltage drops to zero after the short circuit is performed for 0.03 min; according to the battery module designed by the scheme, the short circuit starting voltage drops to 11V, after the short circuit is carried out for 0.01min, the first fusing part 3 is fused, the voltage is further reduced to 8V, and after the short circuit is continued for 0.6min, the voltage drops to zero.
Concretely, in the short circuit process, the fusing time of first fusing part 3 is shorter, take place the fusing earlier, and the fusing time of second fusing part 4 is longer, complete fusing is not, direct short circuit and the condition that the voltage drop is zero can not appear in the battery this moment, voltage reduction is at 8V, after second fusing part 4 fuses, the voltage drop is zero, the time difference of first fusing part 3 and the fusing of second fusing part 4, be within 0.6min promptly, give battery management system reaction time, then the voltage drops to zero, prevent that electric automobile operation in-process from losing power suddenly and leading to the incident.
Detailed description of the preferred embodiment
A battery module comprises an end plate 30, a side plate 40, a bus bar 50 and a plurality of batteries according to the sixth embodiment, wherein the end plate 30 and the side plate 40 form a space for accommodating the batteries, and the batteries are connected in series or in parallel through the bus bar 50.
Description of the invention
A battery module comprises an end plate 30, a side plate 40, a bus bar 50 and a plurality of batteries according to the seventh embodiment, wherein the end plate 30 and the side plate 40 form a space for accommodating the plurality of batteries, and the plurality of batteries are connected in series or in parallel through the bus bar 50.
EXAMPLE twelve
A battery module comprises an end plate 30, a side plate 40, a bus bar 50 and a plurality of batteries according to the eighth embodiment, wherein the end plate 30 and the side plate 40 form a space for accommodating the plurality of batteries, and the plurality of batteries are connected in series or in parallel through the bus bar 50.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A tab for a battery, comprising:
a pole connecting part (1);
the two tab connecting parts (2) are respectively and fixedly and electrically connected with the two ends of the pole connecting part (1) in the width direction (Y);
one of them utmost point ear connecting portion (2) with junction between utmost point post connecting portion (1) is formed with first fusing portion (3), another utmost point ear connecting portion (2) with junction between utmost point post connecting portion (1) is formed with second fusing portion (4), just the fusing time of first fusing portion (3) is less than the fusing time of second fusing portion (4).
2. A tab for a battery according to claim 1, wherein: the cross-sectional area of the first fusing part (3) is smaller than that of the second fusing part (4).
3. A tab for a battery according to claim 2, wherein: the ratio of the cross-sectional area of the second fusion portion (4) to the cross-sectional area of the first fusion portion (3) is greater than or equal to 1.2, and the cross-sectional area of the first fusion portion (3) or the cross-sectional area of the second fusion portion (4) is 1mm2-20mm2。
4. A tab for a battery according to claim 1, wherein: the first fusing part (3) and the second fusing part (4) are both provided with flux coatings.
5. A tab for a battery according to claim 1, wherein: in direction of height (Z), first fusing portion (3) with second fusing portion (4) all are provided with through-hole (5), breach (6) or recess (7), through-hole (5) or recess (7) set up first fusing portion (3) or the surface of second fusing portion (4), breach (6) set up first fusing portion (3) or the both sides of second fusing portion (4) in length direction (X).
6. A tab for a battery according to claim 1, wherein: the distance between the first fusing part (3) and the tab connecting part (2) is 1mm-10 mm.
7. A tab for a battery according to claim 1, wherein: the thickness of the connecting sheet is 0.1mm-5 mm.
8. A tab for a battery according to claim 1, wherein: the pole connecting part (1) and the lug connecting part (2) are both of a flat structure, and the connecting sheet is made of the same material as a current collecting material of a pole piece of the battery cell (10) electrically connected with the connecting sheet.
9. A battery, characterized by: the battery connecting piece comprises a top cover plate (8), a pole (9), a battery cell (10), a shell (20) and the connecting piece as claimed in any one of claims 1 to 8, wherein the pole (9) is installed on the top cover plate (8), the battery cell (10) is accommodated in the shell (20), the top cover plate (8) is connected to the shell (20) in a covering mode, the battery cell (10) is provided with a pole lug (101), the pole (9) is connected with the pole connecting portion (1) through welding, and the pole lug (101) is connected with the pole lug connecting portion (2) through welding.
10. A battery module, its characterized in that: comprising an end plate (30), a side plate (40), a busbar (50) and a plurality of cells according to claim 9, wherein the end plate (30) and the side plate (40) form a space for accommodating the plurality of cells, and the plurality of cells are connected in series or in parallel through the busbar (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022514465.2U CN213717030U (en) | 2020-11-04 | 2020-11-04 | Connection piece, battery and battery module that battery was used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022514465.2U CN213717030U (en) | 2020-11-04 | 2020-11-04 | Connection piece, battery and battery module that battery was used |
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| Publication Number | Publication Date |
|---|---|
| CN213717030U true CN213717030U (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022514465.2U Active CN213717030U (en) | 2020-11-04 | 2020-11-04 | Connection piece, battery and battery module that battery was used |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114188196A (en) * | 2021-11-26 | 2022-03-15 | 星恒电源股份有限公司 | Pulling force current-limiting protector and lithium battery module |
| CN114824675A (en) * | 2022-05-20 | 2022-07-29 | 瑞浦兰钧能源股份有限公司 | Battery cell switching piece and welding method thereof |
| WO2023035990A1 (en) * | 2021-09-07 | 2023-03-16 | 欣旺达电动汽车电池有限公司 | Single battery, battery module, and battery pack |
| CN115863934A (en) * | 2022-11-25 | 2023-03-28 | 厦门海辰储能科技股份有限公司 | Battery, battery module and electric equipment |
| CN115911775A (en) * | 2023-02-09 | 2023-04-04 | 深圳海润新能源科技有限公司 | Current collecting component, energy storage device and electric equipment |
| DE102022210587A1 (en) | 2022-10-06 | 2024-04-11 | Robert Bosch Gesellschaft mit beschränkter Haftung | Pouch cell and battery pack |
| WO2024077480A1 (en) * | 2022-10-11 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | Adapter plate, battery cell, battery and electric device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023035990A1 (en) * | 2021-09-07 | 2023-03-16 | 欣旺达电动汽车电池有限公司 | Single battery, battery module, and battery pack |
| CN114188196A (en) * | 2021-11-26 | 2022-03-15 | 星恒电源股份有限公司 | Pulling force current-limiting protector and lithium battery module |
| CN114824675A (en) * | 2022-05-20 | 2022-07-29 | 瑞浦兰钧能源股份有限公司 | Battery cell switching piece and welding method thereof |
| DE102022210587A1 (en) | 2022-10-06 | 2024-04-11 | Robert Bosch Gesellschaft mit beschränkter Haftung | Pouch cell and battery pack |
| WO2024077480A1 (en) * | 2022-10-11 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | Adapter plate, battery cell, battery and electric device |
| CN115863934A (en) * | 2022-11-25 | 2023-03-28 | 厦门海辰储能科技股份有限公司 | Battery, battery module and electric equipment |
| CN115911775A (en) * | 2023-02-09 | 2023-04-04 | 深圳海润新能源科技有限公司 | Current collecting component, energy storage device and electric equipment |
| US11962045B1 (en) | 2023-02-09 | 2024-04-16 | Shenzhen Hithium Energy Storage Technology Co., Ltd. | Energy storage device and power consuming apparatus |
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Effective date of registration: 20220126 Address after: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli new energy battery technology Co.,Ltd. Address before: 523000 Dalang Town, Dongguan, Guangdong province Xiangshan Pine Hill Village Xiangshan Industrial Park Jiayuan Road No. 9 Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: Jiangsu Tafel Power System Co.,Ltd. |
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