CN111916643A - Electricity core subassembly and battery package - Google Patents
Electricity core subassembly and battery package Download PDFInfo
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- CN111916643A CN111916643A CN202010743817.3A CN202010743817A CN111916643A CN 111916643 A CN111916643 A CN 111916643A CN 202010743817 A CN202010743817 A CN 202010743817A CN 111916643 A CN111916643 A CN 111916643A
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Abstract
The invention provides an electric core assembly and a battery pack, wherein the electric core assembly comprises N electric cores which are arranged in a stacked mode, and the N electric cores are fixedly connected in sequence; the first battery cell and the second battery cell are electrically connected in series through a series connection plate; the series connection plate is provided with a first conducting layer and a second conducting layer, the first conducting layer is electrically connected with the second conducting layer, a positive electrode tab of the first battery cell is fixed and electrically connected with the first conducting layer, and a negative electrode tab of the second battery cell is fixed and electrically connected with the second conducting layer; the material of the first conducting layer is the same as that of a positive electrode lug of the first battery cell, and the material of the second conducting layer is the same as that of a negative electrode lug of the second battery cell; the first battery cell and the second battery cell are any two adjacent battery cells in the N battery cells; n is a positive integer greater than 1. The embodiment of the invention reduces the production cost of the electric core assembly.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to an electric core assembly and a battery pack.
Background
From the market development at home and abroad, the market share of the soft-package polymer lithium ion battery is continuously promoted. The diversified series-parallel combination mode also puts higher requirements on the welding of the battery core tab and the acquisition connecting plate.
For the battery pack in the prior art, due to the nature of the battery, the positive electrode tab of each battery cell in the battery pack is generally made of aluminum, and the negative electrode tab is made of copper. In the prior art, the aluminum of the positive electrode tab is generally converted into nickel, then the nickel tab is welded to one side of the bus plate made of metallic nickel, and the positive electrode tab is welded to the other side of the bus plate. Therefore, in the prior art, the connecting structure in the electric core assembly is complex, and the production cost is high.
Disclosure of Invention
The embodiment of the invention provides an electric core assembly and a battery pack, and aims to solve the problems that the electric core assembly in the prior art is complex in connection structure and high in production cost.
In a first aspect, an embodiment of the present invention provides an electric core assembly, including:
the battery comprises N battery cells which are arranged in a stacked mode, wherein the N battery cells are sequentially and fixedly connected;
the first battery cell and the second battery cell are electrically connected in series through a series connection plate; the series connection plate is provided with a first conducting layer and a second conducting layer, the first conducting layer is in conducting connection with the second conducting layer, a positive electrode tab of the first battery cell is fixed and in conducting connection with the first conducting layer, and a negative electrode tab of the second battery cell is fixed and in conducting connection with the second conducting layer;
the material of the first conducting layer is the same as that of a positive electrode lug of the first battery cell, and the material of the second conducting layer is the same as that of a negative electrode lug of the second battery cell; the first battery cell and the second battery cell are any two adjacent battery cells in the N battery cells; n is a positive integer greater than 1.
Optionally, the battery core assembly further includes a first side plate and a second side plate, the first side plate is fixedly connected to one side of the N battery cells, and the second side plate is fixedly connected to the other side of the N battery cells opposite to the first side plate;
the first side plate is fixedly connected with the second side plate through a screw, and the N battery cells are clamped and fixed by the first side plate and the second side plate.
Optionally, the battery core assembly further includes M battery cell supports, where the battery cell supports are located between the first battery cell and the second battery cell and are respectively and fixedly connected to the first battery cell and the second battery cell; m is a positive integer greater than 1.
Optionally, the battery cell bracket includes a first fixing member, a second fixing member and a fixing plate, and the first fixing member and the second fixing member are respectively disposed at two ends of the fixing plate and fixedly connected to the fixing plate.
Optionally, the screw includes a first screw and a second screw, the first fixing parts in the M cell supports are all fixedly connected to the first screw, and the second fixing parts in the M cell supports are all fixedly connected to the second screw.
Optionally, the positive electrode tab and the negative electrode tab of each battery cell are respectively located at two ends of the battery cell;
the positive electrode lug of the first battery cell comprises a first bent part, and the negative electrode lug of the second battery cell comprises a second bent part; the first bending part is fixedly attached to the first conducting layer, and the second bending part is fixedly attached to the second conducting layer.
Optionally, the first bent portion and the first conductive layer are attached and fixed by laser welding, and the second bent portion and the second conductive layer are attached and fixed by laser welding.
Optionally, the positive electrode tab of the first cell is made of aluminum, and the negative electrode tab of the second cell is made of copper.
Optionally, the first battery cell and the second battery cell are respectively bonded to the fixing plate through glue.
In a second aspect, an embodiment of the present invention provides a battery pack, including the electric core assembly according to any one of the above embodiments.
According to the invention, the first conducting layer and the second conducting layer are arranged on the serial connection plate in the battery pack assembly, for the first battery cell and the second battery cell which are arranged adjacently, the positive pole lug of the first battery cell is fixed and conductively connected with the first conducting layer, the negative pole lug of the second battery cell is fixed and conductively connected with the second conducting layer, the material of the first conducting layer is the same as that of the positive pole lug of the first battery cell, and the material of the second conducting layer is the same as that of the negative pole lug of the second battery cell, so that the lug is not required to be switched, the connecting structure of the battery pack assembly is further simplified, and the cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of an electrical core assembly provided by an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a tandem plate provided in an embodiment of the present invention;
fig. 3 is a schematic diagram of connection between a first battery cell and a battery cell support, where the first battery cell and the second battery cell are provided in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1 to 3, in a first aspect, an embodiment of the present invention provides an electric core assembly, including:
the first cell 11 and the second cell 12 are electrically connected in series through a series plate 20; a first conducting layer 21 and a second conducting layer 22 are arranged on the series plate 20, the first conducting layer 21 is in conducting connection with the second conducting layer 22, a positive electrode tab of the first cell 11 is fixed and in conducting connection with the first conducting layer 21, and a negative electrode tab of the second cell 12 is fixed and in conducting connection with the second conducting layer 22;
the material of the first conductive layer 21 is the same as that of the positive electrode tab of the first cell 11, and the material of the second conductive layer 22 is the same as that of the negative electrode tab of the second cell 12; the first cell 11 and the second cell 12 are any two adjacent cells 10 in the N cells 10; n is a positive integer greater than 1.
In the embodiment of the invention, the battery cell assembly is an important component in a soft package of the lithium ion battery pack, and the battery cell assembly is electrically connected with other electronic components through a lead or a bus board, so that the soft package of the lithium ion battery pack can be obtained. The above-mentioned electric core assembly often includes electric core 10 of N electricity connections in order to satisfy specific power supply demand, and the series connection of polylith electric core 10 wherein can promote the supply voltage of electric core assembly, and parallelly connected electric current and the capacity that can promote electric core assembly. The cell assembly of the embodiment of the invention may adopt N cells 10 electrically connected in series, and the number of the cells may be specifically set according to the required power supply voltage.
For the N battery cells 10, a cuboid may be formed by stacking, wherein two adjacent battery cells 10 are sequentially and fixedly connected. The two adjacent battery cells 10 are electrically connected in series, and the positive electrode tab of the first battery cell 11 and the negative electrode tab of the second battery cell 12 may be electrically connected through a series plate 20.
For each cell 10, the positive electrode tab may be made of aluminum and the negative electrode tab may be made of copper. In order to enable the positive electrode tab in the first cell 11 to be electrically connected with the negative electrode tab in the second cell 12, the series plate 20 may be a metal plate, and is provided with a first conductive layer 21 and a second conductive layer 22, where the first conductive layer 21 is made of the same material as the positive electrode tab, and the second conductive layer 22 is made of the same material as the negative electrode tab, and the specific material may be set according to the tab material. Therefore, the anode tab, such as the aluminum tab, is directly electrically connected with the aluminum conducting layer, and the cathode tab, such as the copper tab, is directly electrically connected with the copper conducting layer. It should be understood that in other embodiments, the above-described tandem plates 20 may also be made of copper aluminum composite.
Meanwhile, the positional relationship between the first conductive layer and the second conductive layer on the series board 20 may be set according to actual needs, that is, the series board 20 may have an upper layer of aluminum, a lower layer of copper, or a lower layer of aluminum and an upper layer of copper, and is not limited further herein.
According to the invention, the first conducting layer 21 and the second conducting layer 22 are arranged on the series plate 20 in the battery assembly, for the first battery cell 11 and the second battery cell 12 which are arranged adjacently, the positive pole lug of the first battery cell 11 is fixed and conductively connected with the first conducting layer 21, the negative pole lug of the second battery cell 12 is fixed and conductively connected with the second conducting layer 22, the material of the first conducting layer 21 is the same as that of the positive pole lug of the first battery cell 11, and the material of the second conducting layer 22 is the same as that of the negative pole lug of the second battery cell 12, so that the lug is not required to be connected, the connecting structure of the battery assembly is simplified, and the cost is reduced.
Further, the cell assembly may further include a first side plate and a second side plate, the first side plate is fixedly connected to one side of the N cells 10, and the second side plate is fixedly connected to the other side of the N cells 10 opposite to each other;
the first side plate and the second side plate are fixedly connected through a screw, and the N cells 10 are clamped and fixed by the first side plate and the second side plate.
The materials of the first side plate and the second side plate can be set according to actual requirements, and in the embodiment of the invention, the first side plate and the second side plate can be both steel plates.
According to the embodiment of the invention, the first side plate and the second side plate are arranged, the screw holes can be formed in the two ends of the first side plate and the second side plate, and the screw holes are matched and fixed through the screw rods and the screw holes, so that the N electric cores 10 can be protected, the expansion degree of the electric cores 10 can be limited when the electric cores 10 expand, and the safety of the electric core assembly is improved.
Further, the battery core assembly further includes M battery cell supports 30, where the battery cell supports 30 are located between the first battery cell 11 and the second battery cell 12, and are respectively and fixedly connected to the first battery cell 11 and the second battery cell 12; m is a positive integer greater than 1.
It should be understood that the number M of the cell holders 30 is determined by the number N of the cells 10. For example, in one embodiment, when N is an even number, M may be N/2.
The positive electrode tab of the first cell 11 and the negative electrode tab of the second cell 12 may be located at the same end, so as to facilitate electrical connection.
The battery cell support 30 includes a first fixing member 31, a second fixing member 32, and a fixing plate 33, where the first fixing member 31 and the second fixing member 32 are respectively disposed at two ends of the fixing plate 33 and fixedly connected to the fixing plate 33.
In an embodiment of the invention, the cell support 30 may be a rectangular frame with flanges and fixing members disposed at two ends, the first cell 11 and the second cell 12 may be disposed at two sides of the rectangular frame, and the positive electrode tab and the negative electrode tab may be fixedly connected to the first fixing member 31 and the second fixing member 32, respectively, so as to facilitate electrical connection between the first cell 11 and the second cell 12.
The materials of the first fixing member 31, the second fixing member 32 and the fixing plate 33 may be set according to actual requirements. In one embodiment, the first fixing member 31, the second fixing member 32 and the fixing plate 33 may be made of aluminum. In other embodiments, the first fixing element 31, the second fixing element 32 and the fixing plate 33 may be made of other metal materials. Meanwhile, the first fixing member 31 and the second fixing member 32 may be fixedly coupled to the fixing plate 33 by welding.
Specifically, the screws include a first screw and a second screw, the first fixing members 31 in the M cell supports 30 are all fixedly connected to the first screw, and the second fixing members 32 in the M cell supports 30 are all fixedly connected to the second screw.
In an embodiment of the present invention, both ends of the M battery cell supports 30 may be provided with screw holes, and the first screw rod and the second screw rod respectively pass through the screw holes at both ends of the M battery cell supports 30, so as to fix the M battery cell supports 30 between the first side plate and the second side plate.
Further, in order to facilitate the arrangement of the cell support and the cell and facilitate the electrical connection between the positive and negative electrode tabs of the cell and the serial connection plate, in an embodiment of the present invention, the positive electrode tab and the negative electrode tab of each of the cells 10 may be respectively located at two ends of the cell 10. It should be understood that, in other embodiments, the positive electrode tab and the negative electrode tab of the battery cell 10 may also be located at the same end of the battery cell, and may be determined according to actual needs.
The positive electrode tab of the first cell 11 includes a first bent portion, and the negative electrode tab of the second cell 12 includes a second bent portion; the first bent portion is bonded and fixed to the first conductive layer 21, and the second bent portion is bonded and fixed to the second conductive layer 22.
Specifically, the first bending portion and the first conductive layer 21 may be bonded and fixed by laser welding. Accordingly, the second bending portion and the second conductive layer 22 may be bonded and fixed by laser welding.
Further, the positive electrode tab of the first cell 11 is made of aluminum, and the negative electrode tab of the second cell 12 is made of copper.
Further, the first battery cell 11 and the second battery cell 12 are respectively bonded to the fixing plate 33 by glue.
It should be noted that foam may be further disposed between the first cell 11 and the fixing plate 33, and the first cell 11 is bonded to the fixing plate 33 by applying glue on both sides of the foam. Correspondingly, foam may be disposed between the second electrical core 12 and the fixing plate 33.
Referring to fig. 1 and 3 together, a specific installation process of the electrical core assembly according to an embodiment of the present invention may be as follows:
for one end of the battery assembly, the negative electrode tab of the first battery cell 11 is welded to the red copper conductive layer of the series plate 20, and then bent, and then the combined structure of the first battery cell 11 and the series plate 20 is clamped into the battery cell holder 30.
The second battery cell 12 is clamped in the battery cell support 30, the positive electrode tab of the second battery cell 12 is bent, and the bent portion is welded to the aluminum conductive layer of the series plate 20.
And the other end of the battery core assembly is in a mode consistent with the steps of the method, so that the stacking arrangement of a plurality of battery cores is realized.
In a second aspect, the embodiment of the invention further provides a battery pack, which includes the above-mentioned battery pack assembly.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The battery cell assembly is characterized by comprising N battery cells which are stacked, wherein the N battery cells are sequentially and fixedly connected;
the first battery cell and the second battery cell are electrically connected in series through a series connection plate; the series connection plate is provided with a first conducting layer and a second conducting layer, the first conducting layer is in conducting connection with the second conducting layer, a positive electrode tab of the first battery cell is fixed and in conducting connection with the first conducting layer, and a negative electrode tab of the second battery cell is fixed and in conducting connection with the second conducting layer;
the material of the first conducting layer is the same as that of a positive electrode lug of the first battery cell, and the material of the second conducting layer is the same as that of a negative electrode lug of the second battery cell; the first battery cell and the second battery cell are any two adjacent battery cells in the N battery cells; n is a positive integer greater than 1.
2. The battery pack assembly of claim 1, wherein the battery pack assembly further comprises a first side plate and a second side plate, the first side plate is fixedly connected with one side of the N battery cells, and the second side plate is fixedly connected with the other side of the N battery cells opposite to the first side plate;
the first side plate is fixedly connected with the second side plate through a screw, and the N battery cells are clamped and fixed by the first side plate and the second side plate.
3. The battery pack assembly of claim 2, wherein the battery pack assembly further comprises M battery cell supports, the battery cell supports being located between the first battery cell and the second battery cell and being fixedly connected to the first battery cell and the second battery cell, respectively; m is a positive integer greater than 1.
4. The battery core assembly of claim 3, wherein the battery core support includes a first fixing member, a second fixing member, and a fixing plate, and the first fixing member and the second fixing member are respectively disposed at two ends of the fixing plate and are fixedly connected to the fixing plate.
5. The battery core assembly of claim 4, wherein the screws comprise a first screw and a second screw, the first fasteners of the M battery cell holders are all fixedly connected with the first screw, and the second fasteners of the M battery cell holders are all fixedly connected with the second screw.
6. The battery core assembly of claim 4, wherein the first battery core and the second battery core are respectively bonded to the fixing plate by glue.
7. The battery pack of claim 1, wherein the positive and negative tabs of each of the cells are located at opposite ends of the cell;
the positive electrode lug of the first battery cell comprises a first bent part, and the negative electrode lug of the second battery cell comprises a second bent part; the first bending part is fixedly attached to the first conducting layer, and the second bending part is fixedly attached to the second conducting layer.
8. The electric core assembly according to claim 7, wherein the first bending portion and the first conductive layer are fixed by laser welding, and the second bending portion and the second conductive layer are fixed by laser welding.
9. The battery pack of claim 1, wherein the positive tab of the first cell is made of aluminum and the negative tab of the second cell is made of copper.
10. A battery pack comprising the electric core assembly of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743817.3A CN111916643A (en) | 2020-07-29 | 2020-07-29 | Electricity core subassembly and battery package |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743817.3A CN111916643A (en) | 2020-07-29 | 2020-07-29 | Electricity core subassembly and battery package |
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| CN111916643A true CN111916643A (en) | 2020-11-10 |
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| CN202010743817.3A Pending CN111916643A (en) | 2020-07-29 | 2020-07-29 | Electricity core subassembly and battery package |
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Cited By (3)
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| CN112563450A (en) * | 2020-12-11 | 2021-03-26 | 珠海冠宇电池股份有限公司 | Positive plate and battery |
| CN112864534A (en) * | 2021-03-01 | 2021-05-28 | 厦门海辰新材料科技有限公司 | Battery core assembly, battery core module, battery and device using battery |
| CN114361726A (en) * | 2021-07-15 | 2022-04-15 | 北京卫蓝新能源科技有限公司 | Laminate polymer battery module |
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