Large module with multiple output poles

Abstract

The utility model provides a large module with a plurality of output poles. The large module comprises an upper cover plate, a lower cover plate, battery cells, busbars, acquisition nickel sheets and the output poles, according to the utility model, a plurality of output poles are respectively arranged at the two sides and the middle part of the module in the large module, so that the length of a copper bar is greatly reduced, the space in the package is increased, the weight of the whole package is reduced, the cost is reduced, and the cost is reduced. And meanwhile, the risk of insulation failure is reduced, and a larger space is avoided for thermal runaway and low-voltage acquisition in the battery pack. The modules are connected through the short copper bars, and finally the module busbars and the short copper bars form a high-voltage loop to be connected with the BDU, so that the length of the copper bars is reduced, the mass of the whole package is reduced, the energy density is improved, and the material cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries and relates to a large module with multiple output poles. Background Art

[0002] During the installation of the battery module, there is a lack of stable and reliable connection between the module bracket and each plate, and it is easy to install it wrong. At this time, the advantage of copper busbars is obvious. Copper busbars are used as electrical connections of battery modules in power battery systems and do not vary with the shape of battery cells. Copper busbars have been widely used in battery connections of new energy vehicles.

[0003] Traditionally, new energy power battery modules are connected by cables. Now, copper busbars are used to replace traditional cables, allowing for a smaller installation space. This not only saves installation time, but also greatly improves the conductivity reliability. The terminal treatment is consistent with the busbar, and the wiring is more beautiful.

[0004] However, at present, in order to form a high-voltage circuit, large-module batteries, whether the output poles are on the same side or on the opposite sides, need a long copper busbar to connect the total positive or negative of the last module to the BDU. This long copper busbar is connected from the front of the battery pack to the back of the battery pack, and its length is generally more than one meter, which increases the mass of the entire pack and reduces the energy density; at the same time, it increases the cost; there is a long copper busbar in the battery pack, which increases the risks of insulation and electrical clearance, and is prone to insulation failure and sparks. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a large module with multiple output poles, which solves the problem that long copper busbars cannot be avoided in the battery pack for high-voltage circuits in the existing large module form, avoids insulation failure and sparking, improves battery energy density, and reduces costs.

[0006] The utility model is realized by the following technical solutions:

[0007] A large module with multiple output poles, including:

[0008] Battery cells, busbars, upper cover, lower cover and nickel sheet collection;

[0009] The battery cell is used to support and connect the upper cover plate and the lower cover plate; the busbar is arranged on the upper cover plate and is welded to the battery cell; the collection nickel sheet is welded on the busbar to collect information of the battery cell; the output poles are respectively arranged on both sides and the middle part of the upper cover plate, and are electrically connected to the busbar.

[0010] Preferably, it also includes a left side plate and a right side plate; the battery cell is arranged in a cavity surrounded by the upper cover plate, the lower cover plate, the left side plate and the right side plate.

[0011] Preferably, the left side plate and the right side plate are connected to the upper cover plate and the lower cover plate respectively by bolts.

[0012] Preferably, the output pole includes a total positive output pole, a total negative output pole, a secondary positive output pole and a secondary negative output pole, the secondary positive output pole and the secondary negative output pole are respectively arranged on both sides of the upper cover plate, and the total positive output pole and the total negative output pole are arranged in the middle part of the upper cover plate.

[0013] Preferably, the total positive output pole is connected to the negative pole of the battery cell of the middle bus, and the total negative output pole is connected to the positive pole of the battery cell of the middle bus; the secondary positive output pole is connected to the negative pole of the battery cell of the side bus; and the secondary negative output pole is connected to the positive pole of the battery cell of the side bus.

[0014] Preferably, the busbar connects a plurality of battery cells in series or in parallel.

[0015] Preferably, the modules are connected by short copper bars.

[0016] Preferably, the module forms a high-voltage circuit through a bus bar and a short copper bus bar, and is connected to the BDU through an output pole.

[0017] Preferably, the battery core is a cylindrical structure.

[0018] Preferably, the multiple battery cells are arranged in an array.

[0019] Compared with the prior art, the utility model has the following beneficial technical effects:

[0020] The utility model provides a large module with multiple output poles, including upper and lower cover plates, battery cells, bus bars, collection nickel sheets and output poles; the battery cell supports are connected to the upper and lower cover plates, the bus bars are welded to the battery cells on the upper cover plate, and the collection nickel sheets are welded to the bus bars to collect battery cell information. The large module of the utility model has multiple output poles arranged on both sides of the module and in the middle of the module, which greatly reduces the length of the copper bus bar, increases the space inside the package, reduces the weight of the entire package, and reduces the risk of insulation failure, leaving more space for avoiding thermal runaway and low-voltage collection in the battery pack.

[0021] Furthermore, the modules are connected by short copper bars, and finally a high-voltage circuit is formed through the module bus and the short copper bar to connect the BDU, which reduces the length of the copper bar, reduces the weight of the whole package, improves the energy density, and reduces the material cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a large module structure with multiple output poles;

[0023] Figure 2 It is a schematic diagram of the total positive output pole and the total negative output pole;

[0024] Figure 3 Schematic diagram of the connection between modules Figure 1 ;

[0025] Figure 4 Schematic diagram of the connection between modules Figure 2 ;

[0026] Figure 5 This is a schematic diagram of a large module with multiple output poles;

[0027] In the figure: auxiliary negative output pole 1, auxiliary positive output pole 2, total negative output pole 3, total positive output pole 4, short copper bus 5, upper cover plate 6, lower cover plate 7, left side plate 8, right side plate 9, battery cell 10, bus bar 11, and collection nickel sheet 12. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0030] In order to improve the grouping efficiency, a large module integrated cell 10 is usually used in this field. A large module has only one positive and one negative output pole. Since a high-voltage loop needs to be formed in the package, it is inevitable that a long copper busbar will be connected from the total positive or negative of the module to the BDU.

[0031] A large module with multiple output poles, such as Figure 1 and Figure 5 As shown, including

[0032] Battery cell 10, bus bar 11, output pole, upper cover plate 6, lower cover plate 7 and nickel collection sheet 12;

[0033] The battery cell 10 is used to support and connect the upper cover plate 6 and the lower cover plate 7; the bus bar 11 is arranged on the upper cover plate 6 and is welded to the battery cell 10; the bus bar 11 arranges the multiple battery cells 10 in series and in parallel; the collection nickel sheet 12 is welded on the bus bar 11 to collect information of the battery cell 10;

[0034] The main output pole and the auxiliary output stage are arranged on the large module, and the auxiliary output stage is arranged on both sides of the large module; the main output pole is arranged in the middle of the large module and is electrically connected to the bus 11; the output poles are respectively arranged on both sides and the middle of the upper cover plate 6, and are electrically connected to the bus 11. Figure 2 As shown, the output pole includes a total positive output pole 4, a total negative output pole 3, a sub-positive output pole 2 and a sub-negative output pole 1, the sub-positive output pole 2 and the sub-negative output pole 1 are respectively arranged on both sides of the upper cover plate 6, and the total positive output pole 4 and the total negative output pole 3 are arranged in the middle of the upper cover plate 6. The total positive output pole 4 and the total negative output pole 3 are arranged on the same side of the large module, and the sub-positive output pole 2 and the sub-negative output pole 1 are arranged on both sides of the same side of the module, and the arrangement positions of the total positive output pole 4 and the total negative output pole 3 are opposite to the other side of the large module;

[0035] like Figure 3 and Figure 4 As shown, the total positive output pole 4 is connected to the negative pole of the battery cell 10 of the middle bus 11, and the total negative output pole 3 is connected to the positive pole of the battery cell 10 of the middle bus 11; the secondary positive output pole 2 is connected to the negative pole of the battery cell 10 of the side bus 11; and the secondary negative output pole 1 is connected to the positive pole of the battery cell 10 of the side bus 11.

[0036] It also includes a left side plate 8 and a right side plate 9; the battery cell 10 is arranged in a cavity surrounded by the upper cover plate 6, the lower cover plate 7, the left side plate 8 and the right side plate 9.

[0037] The left side plate 8 and the right side plate 9 are connected to the upper cover plate 6 and the lower cover plate 7 respectively by bolts; a row of bolt holes are arranged at the installation positions corresponding to the upper cover plate 6 and the lower cover plate 7 on the left side plate 8 and the right side plate 9, and a row of bolt holes are also arranged at the side surfaces of the upper cover plate 6 and the lower cover plate 7 and the installation positions corresponding to the left side plate 8 and the right side plate 9; bolts are fixedly connected between the left side plate 8, the right side plate 9, the upper cover plate 6 and the lower cover plate 7 through the bolt holes; the left side plate 8 and the right side plate 9 are also provided with connection parts for installation with automobile equipment;

[0038] The busbar 11 connects the multiple battery cells 10 in series or in parallel. The multiple battery cells 10 are arranged in an array. The battery cells 10 are arranged side by side in the length direction and the width direction.

[0039] The modules are connected by short copper bars 5; the modules form a high-voltage circuit with the short copper bars 5 through the busbars 11, and are connected to the BDU through the output pole. BDU (Battery Drive Unit) refers to the battery drive unit, which is an important component of new energy vehicles;

[0040] The short copper busbar is a conductive material made of high-purity copper, usually with a rectangular or square cross-section. It is composed of several copper wires or copper foils connected in parallel. This structure makes the short copper busbar have high conductivity and good heat dissipation characteristics. In the power management system, the short copper busbar is used to connect the power input and output modules. It can ensure the current balance between the power modules and provide a stable power supply. In addition, the short-circuit copper busbar can also provide higher power transmission efficiency and meet the equipment's demand for electrical energy. The short copper busbar 5 is made of T2 copper + PVC insulation and has good conductivity. The copper busbar itself is a high-current conductive product and is very suitable for high-voltage and high-current input and output. This is one of the important reasons why the copper busbar is suitable for the connection of electric vehicle power battery modules.

[0041] The battery cell 10 is a cylindrical structure. The cylindrical battery cell 10 has good consistency, good mechanical properties, high bending strength, and low cost. The energy of the single cell of the cylindrical battery cell 10 is small, and the form is easy to control when an accident occurs.

[0042] There is a gap between each copper sheet of the short copper busbar. This design is conducive to heat dissipation. Even if the battery generates a lot of heat due to being in a high-voltage environment, it will not affect the safety of the electric vehicle.

[0043] The copper busbars used in new energy vehicles have good heat dissipation, conductivity, flexible input and output, and can be well connected to the battery module. The structure of the soft copper busbar is relatively compact, which is conducive to optimizing the spatial structure. The manufacturing process is also relatively simple, with high flexibility and integration, making it easier to use and maintain in the future.

[0044] It should be noted that the terms "upper", "lower", "left", "right", "general", "secondary", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0045] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0047] The above description is only a preferred embodiment of the utility model and does not impose any form of limitation on the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A large module with multiple output poles, It is characterized in that include, Battery core (10), busbar (11), upper cover plate (6), lower cover plate (7) and nickel collection sheet (12); The battery cell (10) is used to support and connect the upper cover plate (6) and the lower cover plate (7); the bus bar (11) is arranged on the upper cover plate (6) and is welded to the battery cell (10); the collection nickel sheet (12) is welded to the bus bar (11) and is used to collect information of the battery cell (10); the output poles are respectively arranged on both sides and the middle part of the upper cover plate (6) and are electrically connected to the bus bar (11).

2. A large module with multiple output poles according to claim 1, It is characterized in that It also includes a left side plate (8) and a right side plate (9); the battery core (10) is arranged in a cavity surrounded by the upper cover plate (6), the lower cover plate (7), the left side plate (8) and the right side plate (9).

3. A large module with multiple output poles according to claim 2, It is characterized in that The left side plate (8) and the right side plate (9) are connected to the upper cover plate (6) and the lower cover plate (7) respectively by bolts.

4. A large module with multiple output poles according to claim 1, It is characterized in that The output poles include a total positive output pole (4), a total negative output pole (3), a secondary positive output pole (2) and a secondary negative output pole (1); the secondary positive output pole (2) and the secondary negative output pole (1) are respectively arranged on both sides of an upper cover plate (6); and the total positive output pole (4) and the total negative output pole (3) are arranged in the middle of the upper cover plate (6).

5. A large module with multiple output poles according to claim 4, It is characterized in that The total positive output electrode (4) is connected to the negative electrode of the battery cell (10) of the middle bus (11), and the total negative output electrode (3) is connected to the positive electrode of the battery cell (10) of the middle bus (11); the secondary positive output electrode (2) is connected to the negative electrode of the battery cell (10) of the side bus (11); and the secondary negative output electrode (1) is connected to the positive electrode of the battery cell (10) of the side bus (11).

6. A large module with multiple output poles according to claim 1, It is characterized in that The busbar (11) connects a plurality of battery cells (10) in series or in parallel.

7. A large module with multiple output poles according to claim 1, It is characterized in that The modules are connected by short copper bars (5).

8. A large module with multiple output poles according to claim 7, It is characterized in that The module forms a high-voltage circuit through the busbar (11) and the short copper busbar (5), and is connected to the BDU through the output pole.

9. A large module with multiple output poles according to claim 1, It is characterized in that The battery core (10) is a cylindrical structure.

10. A large module with multiple output poles according to claim 1, It is characterized in that The multiple battery cells (10) are arranged in an array.

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