Battery assembly and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery assembly and a battery, which comprise a busbar assembly, a cooling device and a hot pressing film, the busbar assembly comprises a busbar, and the cooling device comprises a cooling pipe attached to the busbar. The hot-pressing film covers the busbar in a hot-pressing mode, and the cooling pipe is located between the hot-pressing film and the busbar. According to the battery assembly and the battery, the busbar directly connected with the battery core can be better cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery assembly and a battery. Background Art

[0002] The CCS (Cells Contact System, integrated busbar) component is part of the battery assembly and can realize functions such as series and parallel connection of battery cells, as well as temperature sampling and voltage sampling of battery cells.

[0003] At present, charging and discharging at high temperatures have a great impact on batteries, especially in hot summer. Charging and discharging at high temperatures poses a risk of thermal runaway of the battery, causing the CCS components to overheat. In order to avoid thermal runaway of the battery, existing batteries generally have a liquid cooling plate at the bottom of the battery to absorb the heat of the battery, but this does not solve the problem of high bus temperature at the top of the battery. The heat on the bus needs to pass through the battery body before it can be transferred to the liquid cooling plate, and the cooling effect of the bus is poor.

[0004] In view of this, it is necessary to design a battery assembly and a battery to better cool the busbar. Utility Model Content

[0005] The utility model aims to provide a battery assembly and a battery, which can better cool the busbar.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery assembly, comprising a busbar assembly, a cooling device and a hot pressing film;

[0008] The busbar assembly includes a busbar, and the cooling device includes a cooling pipe attached to the busbar;

[0009] The hot pressing film is hot pressed and laminated on the bus bar, and the cooling tube is located between the hot pressing film and the bus bar.

[0010] Optionally, an assembly groove is provided on the bus bar, and the cooling pipe is embedded in the assembly groove.

[0011] Optionally, the cooling pipe fits against the groove side walls and groove bottom wall of the assembly groove.

[0012] Optionally, a heating device is also included;

[0013] The heating device comprises a heating wire, the heating wire is attached to the bus bar, and the heating wire is located between the hot pressing film and the bus bar;

[0014] The heating wire comprises a heating wire and an insulating heat-conductive film wrapping the heating wire.

[0015] Optionally, the heating wire is connected in series to all the bus bars.

[0016] Optionally, it further comprises a flexible circuit board; the flexible circuit board is connected to the busbar assembly, and the hot pressing film is at least partially hot pressed and laminated on the flexible circuit board;

[0017] A temperature acquisition module for acquiring the temperature of the battery pack is installed on the flexible circuit board, and the temperature acquisition module is electrically connected to the cooling device and the heating device.

[0018] Optionally, the cooling tube is a heat-conducting insulating tube; or, the cooling tube is a metal tube, and an insulating heat-conducting coating is provided between the cooling tube and the bus bar.

[0019] Optionally, the busbar assembly includes a plurality of rows of the busbars, the busbars in each row are connected to the same cooling tube, and two adjacent cooling tubes are connected in parallel.

[0020] Optionally, a blister tray is further included, the busbar assembly and the flexible circuit board are both mounted on the blister tray, and the hot pressing film is hot-pressed and covered on the blister tray.

[0021] A battery comprises a battery assembly as described in any one of the above items.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] In this embodiment, the cooling tube is directly attached to the bus to exchange heat with the bus, thereby effectively absorbing the heat on the bus and preventing the bus from being overheated. In addition, the hot pressing film is hot-pressed and laminated on the bus, and the cooling tube is located between the hot pressing film and the bus. The hot pressing film can always maintain good contact between the bus and the cooling tube, ensuring that the cooling tube has a good cooling effect on the bus. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0026] Figure 1 A schematic diagram of the installation structure of the busbar, cooling tube and hot pressing film provided in the embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the installation structure of a battery assembly provided in an embodiment of the utility model;

[0028] Figure 3 for Figure 2 A magnified schematic diagram of position A in the middle;

[0029] Figure 4 A schematic diagram of the installation structure of the busbar, cooling tube and heating wire provided in the embodiment of the utility model;

[0030] Figure 5 An exploded schematic diagram of a battery assembly provided in an embodiment of the utility model;

[0031] Figure 6 for Figure 5 A magnified schematic diagram of position B in the middle;

[0032] Figure 7 A schematic diagram of the structure of a cooling device provided by an embodiment of the utility model;

[0033] Figure 8 A schematic structural diagram of a heating device provided in an embodiment of the utility model.

[0034] Illustrations: 1. Bus assembly; 101. Assembly groove; 11. Bus; 2. Cooling device; 21. Cooling tube; 3. Hot pressing film; 4. Heating device; 41. Heating wire; 5. Flexible circuit board; 6. Blister tray. DETAILED DESCRIPTION

[0035] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. It should be noted that 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 centrally arranged component at the same time.

[0037] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0038] Embodiment 1

[0039] The embodiment of the utility model provides a battery assembly, which can effectively improve the cooling effect of the bus bar 11 and reduce the difficulty of installing the cooling device.

[0040] See also Figures 1 to 8 The battery assembly includes a bus assembly 1, a cooling device 2 and a hot pressing film 3; the hot pressing film 3 can shrink when heated, thereby covering the corresponding components.

[0041] In this embodiment, the bus assembly 1 includes a bus 11, and the bus 11 is directly connected to the pole part of the battery cell, so it is easy to have a high temperature. The cooling device 2 includes a cooling tube 21 attached to the bus 11; the hot pressing film 3 is heated and hot pressed on the bus 11, so that the cooling tube 21 is pressed on the surface of the bus 11, and the cooling tube 21 is located between the hot pressing film 3 and the bus 11 to complete the fixation. A cooling liquid or a cooling air flow for cooling generally flows in the cooling tube 21.

[0042] Specifically, the hot pressing film 3 is equivalent to applying pressure to the cooling tube 21, so that the cooling tube 21 always keeps in contact with the bus 11, so that the cooling tube 21 has a good cooling effect on the bus 11. In this embodiment, the cooling tube 21 directly cools the bus 11, which can effectively prevent the bus 11 from being overheated.

[0043] In a specific embodiment, the top surface of the bus 11 is a plane. In this embodiment, a hot pressing film 3 is used to hot press and laminate the cooling tube 21, so the cooling tube does not need to be fixed by threaded fasteners, making the installation of the cooling tube 21 faster and greatly improving the installation efficiency.

[0044] It should also be noted that the cooling tube 21 directly cools the bus 11 with a higher temperature, and the cooling efficiency is higher. Therefore, there is no need to set a liquid cooling plate with a large volume and weight, which is beneficial to reducing the total volume and total mass of the battery.

[0045] Optionally, an assembly groove 101 is provided on the busbar 11, and the cooling pipe 21 is embedded in the assembly groove 101. Optionally, the cooling pipe 21 fits the groove side wall and the groove bottom wall of the assembly groove 101. Specifically, the cooling pipe 21 is embedded in the assembly groove 101, so that the contact area between the cooling pipe 21 and the busbar 11 can be larger, and the heat transfer efficiency is improved, so as to improve the cooling effect of the busbar 11.

[0046] Optionally, the battery assembly also includes a heating device 4; the heating device 4 includes a heating wire 41, the heating wire 41 is mounted on the bus 11, and the heating wire 41 is located between the hot pressing film 3 and the bus 11; the heating wire 41 includes a heating wire and an insulating heat-conductive film wrapped around the heating wire. In this embodiment, the heating wire 41 is an electric heating wire, and the bus 11 is heated by directly attaching the heating wire 41 to the bus 11, which effectively improves the heating efficiency and avoids the battery temperature being too low when the external environment is cold. It should also be noted that the cooperation between the heating wire 41 and the cooling tube 21 allows the battery to be used in various environments, that is, the battery has a wider range of applications. Specifically, when the temperature is higher than the upper limit temperature set by the battery management system, the cooling device 2 is started by the battery management system; when the temperature is lower than the lower limit temperature set by the battery management system, the cooling device 2 is turned off by the battery management system, and the heating device 4 is started to realize the battery pack heating function.

[0047] Optionally, the heating wire 41 is connected in series to all the busbars 11. It should be specifically noted that the heating wire 41 can be bent arbitrarily, so the bending length is longer on a larger busbar 11, thereby meeting the heating needs of busbars 11 of different areas. It should also be noted that the heating wire 41 is fixed to the busbar 11 by hot pressing and covering the hot pressing film 3, thereby completing the fixing of the heating wire 41, making the assembly of the heating wire 41 simpler and more convenient.

[0048] Optionally, the battery assembly also includes a flexible circuit board 5; the flexible circuit board 5 is connected to the bus assembly 1, and the hot pressing film 3 is at least partially hot pressed and laminated on the flexible circuit board 5; a temperature acquisition module for collecting the temperature of the battery pack is installed on the flexible circuit board 5, and the temperature acquisition module is electrically connected to the cooling device 2 and the heating device 4. The hot pressing film 3 is partially hot pressed on the flexible circuit board 5, so that the flexible circuit board 5 can be well fixed to avoid the problem of excessive position deviation of the flexible circuit board 5. The temperature acquisition module is used to provide the battery management system with the temperature information of the battery, so that the battery management system starts the cooling device 2 or the heating device 4. It should be supplemented that when the cooling device 2 is working, the heating device 4 stops working; when the heating device 4 is working, the cooling device 2 stops working.

[0049] Optionally, the cooling tube 21 is a heat-conducting insulating tube; or, the cooling tube 21 is a metal tube, and an insulating heat-conducting coating is provided between the cooling tube 21 and the bus 11. For example, the cooling tube 21 is preferably a rubber cooling tube. The cooling tube 21 can also be a copper tube or a rubber tube with a diameter of 0.5 to 3 mm, and the length is generally between 1 and 3 meters.

[0050] Optionally, the busbar assembly 1 includes a plurality of rows of busbars 11, each row of busbars 11 is connected to the same cooling tube 21, and two adjacent cooling tubes 21 are connected in parallel. Specifically, the design of parallel cooling tubes 21 can reduce flow resistance, increase cooling rate, and improve cooling effect.

[0051] Optionally, the battery assembly further includes a blister tray 6, the busbar assembly 1 and the flexible circuit board 5 are both mounted on the blister tray 6, and the hot pressing film 3 is hot pressed and covered on the blister tray 6. Specifically, after the busbar assembly 1, the cooling tube 21, the heating wire 41 and the flexible circuit board 5 are all arranged on the blister tray 6, the hot pressing film 3 is covered on the busbar assembly 1, the cooling tube 21, the heating wire 41 and the flexible circuit board 5 of the blister tray 6, and then the hot pressing film 3 is hot pressed, so that the hot pressing film 3 is hot pressed and covered on the blister tray 6, and after the hot pressing film 3 is cooled, the busbar assembly 1, the cooling device 2, the heating device 4, the flexible circuit board 5 and the blister tray 6 are formed into an integrated structure.

[0052] Embodiment 2

[0053] This embodiment discloses a battery, including the battery assembly as described in the first embodiment.

[0054] Batteries are used to power electrical devices, such as cars, cell phones, portable devices, laptops, ships, spacecraft, medical equipment, electric toys and power tools, etc.

[0055] Among them, cars can be fuel cars, gas cars or new energy cars. New energy cars can be pure electric cars, hybrid cars or extended-range cars, etc.; spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; medical equipment can be various types of testing equipment; electric toys include fixed or mobile electric toys, etc.

[0056] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A battery assembly, characterized in that: It comprises a busbar assembly (1), a cooling device (2) and a hot pressing film (3); The busbar assembly (1) comprises a busbar (11), and the cooling device (2) comprises a cooling pipe (21) attached to the busbar (11); The hot pressing film (3) is hot pressed onto the bus bar (11), and the cooling tube (21) is located between the hot pressing film (3) and the bus bar (11).

2. The battery assembly according to claim 1, characterized in that: An assembly groove (101) is provided on the busbar (11), and the cooling pipe (21) is embedded in the assembly groove (101).

3. The battery assembly according to claim 2, characterized in that: The cooling pipe (21) fits the groove side walls and groove bottom wall of the assembly groove (101).

4. The battery assembly according to claim 1, characterized in that: Also includes a heating device (4); The heating device (4) comprises a heating wire (41), the heating wire (41) is mounted on the bus bar (11), and the heating wire (41) is located between the hot pressing film (3) and the bus bar (11); The heating wire (41) comprises a heating wire and an insulating heat-conductive film wrapping the heating wire.

5. The battery assembly according to claim 4, characterized in that: The heating wire (41) is connected in series to all the bus bars (11).

6. The battery assembly according to claim 4, characterized in that: It also includes a flexible circuit board (5); the flexible circuit board (5) is connected to the busbar assembly (1), and the hot pressing film (3) is at least partially hot pressed and laminated on the flexible circuit board (5); A temperature acquisition module for acquiring the temperature of the battery pack is installed on the flexible circuit board (5), and the temperature acquisition module is electrically connected to the cooling device (2) and the heating device (4).

7. The battery assembly according to claim 1, characterized in that: The cooling pipe (21) is a heat-conducting insulating pipe; or, the cooling pipe (21) is a metal pipe, and an insulating heat-conducting coating is provided between the cooling pipe (21) and the busbar (11).

8. The battery assembly according to claim 6, characterized in that: The busbar assembly (1) comprises a plurality of rows of busbars (11), each row of busbars (11) is connected to the same cooling tube (21), and two adjacent cooling tubes (21) are connected in parallel.

9. The battery assembly according to claim 8, characterized in that: It also comprises a blister tray (6), the busbar assembly (1) and the flexible circuit board (5) are both mounted on the blister tray (6), and the hot pressing film (3) is hot pressed and covered on the blister tray (6).

10. A battery, characterized in that: The invention comprises a battery assembly as claimed in any one of claims 1 to 9.

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