Plug-in type battery cell heating mechanism and battery module assembly with same

Abstract

The invention relates to the field of battery packs, in particular to a plug-in type battery cell heating mechanism and a battery module assembly with the battery cell heating mechanism, the plug-in type battery cell heating mechanism comprises an acquisition plate, and the acquisition plate is provided with at least one heating sheet; the heating sheets are distributed between the adjacent single battery cells; according to the invention, the heating sheet in the heating mechanism is electrically connected with the external charging pile through the cable to supply power to the heating sheet, and the heating sheet is located between the adjacent battery packs, so that the heating sheet can fully contact with the batteries, and can effectively contact the battery cells of the batteries of the battery packs in a large area to heat the battery cells; therefore, the heating efficiency and the heating uniformity are greatly improved, the temperature difference of the battery is reduced, and the service life of the battery is effectively ensured.

Description

Technical Field

[0001] The present invention relates to the field of battery packs, and in particular to a plug-in battery core heating mechanism and a battery module assembly having the battery core heating mechanism. Background Art

[0002] Lithium-ion batteries are currently widely used in various small appliances and electric vehicles. The power batteries used in electric vehicles usually operate at a temperature of -20℃-60℃. The power batteries can work better and maintain the life of the battery cells in a suitable temperature environment. High or low temperatures will affect the service life of the battery cells, especially in winter when the ambient temperature is low. The battery life of electric vehicles is severely reduced, which seriously affects the life of the battery. Therefore, it is necessary to consider the low-temperature heating and heating uniformity of the power battery.

[0003] At present, the commonly used heating mode for battery modules in the market is to use silicone heating film or PI film, such as patent: 201811531673.4-battery module heating film, battery pack and its lower shell and battery pack assembly method.

[0004] The layout positions are also different, and the current heating films are all arranged outside the battery module, which has the following shortcomings:

[0005] 1. The heating film is arranged outside the battery module, which makes it easy to bump and damage during transportation and assembly;

[0006] 2. The heating film layout mode has uneven heating, large temperature difference of the battery, which has a great impact on the life;

[0007] 3. The traditional heating film adopts a structure integrating resistance wire and silicone, which has poor anti-aging ability at high temperature. Since silicone is soft and easy to bend, the resistance wire is easy to break.

[0008] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing battery module. Summary of the invention

[0009] The object of the present invention is to provide a battery core heating mechanism which can be plugged into a battery core unit.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is:

[0011] A plug-in battery core heating mechanism comprises a collection plate, on which at least one heating plate is arranged; the heating plates are distributed between adjacent single battery cores.

[0012] The heating plate is arranged perpendicular to the collecting plate.

[0013] The heating plate is arranged in close contact with adjacent single cells.

[0014] A battery module assembly includes a battery cell unit, on which the plug-in battery cell heating mechanism is provided; the battery cell unit includes at least two battery groups, each battery group includes at least one single battery cell; the heating plate in the plug-in battery cell heating mechanism is plugged between adjacent battery groups.

[0015] Insulating spacers are arranged between the single cells in each battery pack.

[0016] The battery cell unit is connected with a fixing mechanism for fixing each single cell and the heating plate.

[0017] The fixing mechanism comprises two insulating sheets spaced apart at the ends of the battery cell units and a fixing belt wound around the battery cell units and the insulating sheets.

[0018] The fixing mechanism comprises two end plates which are spaced apart and arranged at the ends of the battery core unit; two ends of the two end plates are respectively connected by a side plate.

[0019] An insulating film is provided on one side of the side plate close to the battery cell unit.

[0020] The collection board is arranged on the battery cell unit; and the single battery cells in the battery cell unit are connected to the collection board; and a protective cover is also provided on the collection board.

[0021] The advantages of the present invention are:

[0022] The invention discloses a plug-in type battery core heating mechanism and a battery module assembly having the battery core heating mechanism.

[0023] The present invention uses a heating plate in the heating mechanism, and the heating plate is electrically connected to an external charging pile through a cable to power the heating plate. The heating plate is located between adjacent battery packs, so that the heating plate can fully contact the battery and can effectively and widely contact the battery cells of the battery pack to heat the battery cells, thereby greatly improving the heating efficiency and heating uniformity, reducing the battery temperature difference, and effectively ensuring the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0025] Figure 1 FIG. 1 is a schematic structural diagram of a first embodiment of the present invention.

[0026] Figure 2 FIG. 2 is a schematic structural diagram of a second embodiment of the present invention.

[0027] The marks in the above figure are:

[0028] 1. Heating mechanism, 2. Fixing, 3. Battery pack. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0030] A plug-in battery cell heating mechanism 1 includes a collection plate 11, on which at least one heating plate 12 is provided; the heating plates 12 are distributed between adjacent single battery cells 31; the plug-in battery cell heating mechanism 1 disclosed in the present invention is mainly used for heating operations of each battery pack 3 in a battery cell unit. In the present invention, the heating plate 12 in the heating mechanism 1 is electrically connected to an external charging pile through a cable to power the heating plate 12, and the heating plate 12 is located between adjacent battery packs 3, so that the heating plate 12 can fully contact the battery, and can effectively and widely contact the battery cells of the battery pack 3 to heat the battery cells, thereby greatly improving the heating efficiency and heating uniformity, reducing the battery temperature difference, and effectively ensuring the service life of the battery.

[0031] Specifically, in the present invention, the plug-in battery cell heating mechanism 1 mainly includes a collection board 11. The collection board 11 can use an existing structure, and at least one heating plate 12 is provided on the collection board 11; it is generally determined according to the number of battery packs 3, and generally a heating plate 12 is arranged between adjacent battery packs 3; in actual use, the heating plate 12 of the present invention is distributed between adjacent single battery cells 31; specifically, it is distributed in the area between the single battery cells 31 in adjacent battery packs 3.

[0032] Furthermore, in the present invention, the heating plate 12 is arranged perpendicular to the collection plate 11; through the above design, the present invention facilitates the insertion of the heating plate 12 between adjacent battery groups 3, and at the same time, the heating plate 12 in the present invention is arranged in close contact with the adjacent single cells 31; and both sides of the heating plate 12 are in close contact with the single cells 31 of the adjacent battery group 3, and the size of the heating plate 12 in the present invention matches the size of the single cells 31 in the battery group 3, so that the heating plate 12 can fully contact with the battery group 3, and can effectively and widely contact the single cells 31 of the battery group 3 to heat the cells, thereby greatly improving the heating efficiency and heating uniformity.

[0033] A battery module assembly includes a battery cell unit, on which the plug-in battery cell heating mechanism 1 is provided; the battery cell unit includes at least two battery packs 3, each battery pack 3 includes at least one single battery cell 31; the heating plate 12 in the plug-in battery cell heating mechanism 1 is plugged between adjacent battery packs 3; the heating plate 12 of the present invention is located between adjacent battery packs 3, so that the heating plate 12 can fully contact with the battery, can effectively and widely contact the battery cells of the battery pack 3, and heat the battery cells, thereby greatly improving the heating efficiency and heating uniformity, reducing the battery temperature difference, and effectively ensuring the service life of the battery.

[0034] Furthermore, in the present invention, an insulating spacer 4 is arranged between the single cells 31 in each battery pack 3; the insulating spacer 4 plays an isolating role, and two single cells 31 are separated by the insulating spacer 4, which can effectively prevent the positive and negative electrodes from contacting each other and causing an internal short circuit.

[0035] Furthermore, in the present invention, the battery cell unit is connected with a fixing mechanism 2 for fixing each single cell and the heating plate 12; the setting of the fixing mechanism 2 facilitates the connection between each single cell 31 in the battery cell unit, and also facilitates the installation and fixation of the heating plate 12 between the battery cell units.

[0036] In the present invention, the fixing mechanism 2 has a variety of implementation schemes, which can be selected according to specific needs.

[0037] In the present invention, the fixing mechanism 2 includes two insulating sheets 21 spaced apart at the ends of the battery cell units and a fixing belt 22 wrapped around the battery cell units and the insulating sheet 21; the insulating sheet 21 of the present invention acts as the end module end plate 23 of the module, which can limit the end position of each single battery cell 31. At the same time, in the present invention, the fixing belt 22 acts as a cable tie, and the fixing belt 22 is subsequently fixed to the battery cell unit and the insulating sheet 21 in the circumferential direction.

[0038] Furthermore, in the present invention, the fixing mechanism 2 includes two end plates 23 spaced apart at the ends of the battery cell unit; the two ends of the two end plates 23 are connected by a side plate 24 respectively; the two end plates 23 and the two side plates 24 of the present invention form a box structure with openings at the top and bottom, which surrounds the battery cell unit during subsequent use to provide better protection.

[0039] In addition, in the present invention, the end plate 23 adopts an aluminum end plate 23, and the side plate 24 adopts an aluminum side plate 24. The end plate 23 and the side plate 24 are welded into a group to protect the battery module. At the same time, the battery pack 3 and the heating plate 12 are stably fixed. The structure is firm and not easy to break or damage, and has good high temperature resistance, corrosion resistance, and aging resistance. At the same time, in order to play an isolation and protection role, an insulating film is provided on the side of the side plate 24 close to the battery cell unit described in the present invention to reduce leakage problems.

[0040] Furthermore, in the present invention, the acquisition board 11 is arranged on the battery cell unit; and the single battery cell 31 in the battery cell unit is connected to the acquisition board 11; the acquisition board 11 can realize the acquisition of electrical signals and other signals, and the acquisition board 11 also acts as a hanging board to facilitate the plugging and fixing of the heating plate 12 in the battery cell unit.

[0041] Meanwhile, a protective cover 5 is also provided on the collecting plate 11 in the present invention; a protective cover 5 is provided at the top of the collecting plate 11; the protective cover 5 is used to protect the collecting plate 11 to prevent foreign impurities or pollutants from falling onto the collecting plate 11 and causing corrosion to the collecting plate 11.

[0042] specific:

[0043] The present invention

[0044] The purpose is to provide a battery module structure with a heating function to solve the problems of uneven heating, easy bending, and weak structure of the existing battery module heating structure.

[0045] The technical solution of the present invention to solve the above technical problems is as follows:

[0046] A battery module structure with a heating function, comprising: a battery module, a heating mechanism 1 and a fixing mechanism 2, wherein the battery module comprises at least two parallel battery packs 3;

[0047] The heating mechanism 1 includes a collection plate 11 and a heating plate 12 vertically arranged at the bottom of the collection plate 11. The heating plate 12 is located between adjacent battery groups 3, and the battery group 3 is located below the collection plate 11. The fixing mechanism 2 is arranged outside the battery module and is used to fix the battery group 3 and the heating plate 12.

[0048] The beneficial effects of adopting the above technical solution are as follows: through the heating plate 12 in the heating mechanism 1, the heating plate 12 is electrically connected to the external charging pile through a cable to power the heating plate 12, and the heating plate 12 is located between adjacent battery packs 3, so that the heating plate 12 can fully contact the battery, and can effectively and widely contact the battery cells of the battery pack 3 to heat the battery cells, thereby greatly improving the heating efficiency and heating uniformity, reducing the battery temperature difference, and effectively ensuring the service life of the battery; the battery pack 3 and the heating plate 12 are fixed by the fixing mechanism 2, the structure is firm and not easy to break or damage, and the stability of the structure is improved.

[0049] Furthermore, the fixing mechanism 2 includes an end plate 23 , an insulating sheet 21 and a fixing belt 22 . The end plate 23 , the insulating sheet 21 are respectively arranged on two sides of the battery module, and the fixing belt 22 is arranged around the outer periphery of the insulating sheet 21 of the end plate 23 on both sides.

[0050] The beneficial effects of adopting the above technical solution are: the two ends of the battery module are fixed by the end plate 23 insulating sheet 21, and then the fixing belt 22 is wrapped around the outer periphery of the end plate 23 insulating sheet to tighten the battery module and the heating plate 12 to achieve the purpose of fixation, facilitate assembly and ensure installation accuracy, while ensuring the reliability of the module.

[0051] Furthermore, the fixing mechanism 2 also includes end plates 23 and side plates 24 . The end plates 23 are respectively arranged on both sides of the battery module. An insulating film is attached to the inner side of the side plates 24 . The side plates 24 are respectively arranged on both sides of the battery module and adjacent to the end plates 23 .

[0052] The beneficial effect of adopting the above technical solution is: another structure of the fixing mechanism 2 surrounds and fixes the battery module, the heating plate 12, etc. through the end plate 23 and the side plate 24, thereby fixing the battery module and the heating plate 12.

[0053] Furthermore, the battery pack 3 is composed of two single cells 31 , and the two single cells 31 are separated by a separator 4 .

[0054] The beneficial effect of adopting the above technical solution is that the spacers 4 are arranged between the single cells 31, which can effectively prevent the positive and negative electrodes from contacting each other and causing an internal short circuit.

[0055] Furthermore, a protective cover 5 is provided on the top of the collection plate 11 .

[0056] The beneficial effects of adopting the above technical solution are as follows: the protective cover 5 is used to protect the collection plate 11, and prevents foreign impurities or pollutants from falling onto the collection plate 11 and causing corrosion to the collection plate 11.

[0057] Furthermore, at least one heating plate 12 is provided.

[0058] The beneficial effects of adopting the above technical solution are: the number of heating plates 12 is determined according to the number of battery packs 3, and the heating plates 12 can effectively and widely contact the battery cells of the battery pack 3 to heat the battery cells, thereby greatly improving the heating efficiency and heating uniformity, reducing the battery temperature difference, and effectively ensuring the service life of the battery.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The heating plate 12 of the present invention is located between adjacent battery packs 3, so that the heating plate 12 can fully contact the battery, and can effectively and widely contact the battery cells of the battery pack 3 to heat the battery cells, thereby greatly improving the heating efficiency and heating uniformity, reducing the battery temperature difference, and effectively ensuring the service life of the battery.

[0061] The present invention fixes the battery pack 3 and the heating plate 12 by means of the fixing mechanism 2, so that the structure is firm and not easy to break or damage, thereby improving the stability of the structure.

[0062] The heating plate 12 structure is integrated with a ceramic heating plate 12, a PCB collection board 11 and a protective cover 5; the integrated ceramic heating plate 12 is evenly installed in the middle of the power battery, and the heating surface is in full contact with the surface of the battery cell.

[0063] like Figure 1 As shown, a battery module structure with a heating function includes: a battery module, a heating mechanism 1 and a fixing mechanism 2, the battery module includes at least two parallel battery packs 3; the battery pack 3 is composed of two single cells 31, and the two single cells 31 are separated by a separator 4, and the separator 4 can effectively prevent the positive and negative electrodes from contacting each other and causing an internal short circuit.

[0064] At least two battery packs 3 are provided, and different numbers of battery packs 3 can be provided according to battery capacity requirements, such as three, four, five, etc.

[0065] The number of battery packs 3 in the present application is six.

[0066] The heating mechanism 1 includes a collection plate 11, and a heating plate 12 vertically arranged at the bottom of the collection plate 11. The heating plate 12 adopts an existing ceramic heating plate 12 or an epoxy plate or a mica plate, and the heating wire can adopt a tungsten wire, a nickel solder wire, etc.; the heating plate 12 is located between adjacent battery groups 3, and there is a gap between adjacent battery groups 3 for the heating plate 12 to pass through, and the two sides of the heating plate 12 are in contact with the single cells 31 of the adjacent battery groups 3. The size of the heating plate 12 in the present application matches the size of the single cell 31 in the battery group 3, so that the heating plate 12 can fully contact the battery group 3 , can effectively and widely contact the battery cells of the battery pack 3, heat the cells, thereby greatly improving the heating efficiency and heating uniformity; and the battery pack 3 is located below the acquisition board 11, and the single cells 31 in the battery pack 3 are electrically connected to the acquisition board 11. The acquisition board 11 in this application adopts the PCB acquisition board 11 or FPC integrated circuit board commonly used in existing battery modules. The fixing mechanism 2 is surrounded by the outside of the battery module and is used to fix the battery pack 3 and the heating plate 12; the fixing mechanism 2 is used to fix the battery module and the heating plate 12, thereby improving the structural stability. The wiring port of the heating plate 12 is connected to the cable, and the cable is plugged into the external charging pile to power it.

[0067] In order to protect the collection plate 11 , a protective cover 5 is provided on the top of the collection plate 11 .

[0068] At least one heating plate 12 is provided; the number of the heating plates 12 varies according to the number of the battery packs 3 , so that the cells of the batteries of the battery pack 3 can be evenly heated under the action of the heating plates 12 .

[0069] Example 1

[0070] like Figure 1 As shown, the fixing mechanism 2 includes an end plate 23, an insulating sheet 21 and a fixing belt 22. The end plate 23, the insulating sheet 21 are respectively arranged on two sides of the battery module, and the fixing belt 22 is arranged around the outer periphery of the insulating sheet 21 of the end plate 23 on both sides.

[0071] The end plate 23 and the insulating sheet 21 are arranged on both sides of the battery module, so that the fixing belt 22 can be wrapped around the outer wall thereof for tightening and fixing, thereby achieving the purpose of fixing the battery pack 3 and the heating sheet 12 .

[0072] Example 2

[0073] Compared with the fixing mechanism 2 in Example 1, the fixing mechanism 2 in this embodiment has better fixing strength and a more solid structure.

[0074] like Figure 2As shown, the fixing mechanism 2 further includes an end plate 23 and a side plate 24. The end plates 23 are respectively arranged on both sides of the battery module, and an insulating film is attached to the inner side of the side plate 24. The side plates 24 are respectively arranged on both sides of the battery module and adjacent to the end plates 23. The end plates 23 are made of aluminum end plates 23, and the side plates 24 are made of aluminum side plates 24. The end plates 23 and the side plates 24 are welded into a group to protect the battery module, and at the same time, the battery pack 3 and the heating plate 12 are stably fixed. The structure is firm and not easy to break or damage, and has good high temperature resistance, corrosion resistance, and aging resistance.

[0075] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A plug-in battery core heating mechanism, characterized in that: It comprises a collection board, on which at least one heating plate is arranged; the heating plates are distributed between adjacent single cells.

2. A plug-in battery core heating mechanism according to claim 1, characterized in that: The heating plate is arranged perpendicular to the collecting plate.

3. A plug-in battery core heating mechanism according to claim 1, characterized in that: The heating plate is arranged in close contact with adjacent single cells.

4. A battery module assembly, characterized in that: It comprises a battery cell unit, on which is provided a plug-in battery cell heating mechanism as described in any one of claims 1 to 3; the battery cell unit comprises at least two battery groups, each battery group comprises at least one single battery cell; the heating plate in the plug-in battery cell heating mechanism is plugged between adjacent battery groups.

5. A battery module assembly according to claim 4, characterized in that: Insulating spacers are arranged between the single cells in each battery pack.

6. A battery module assembly according to claim 4, characterized in that: The battery cell unit is connected with a fixing mechanism for fixing each single cell and the heating plate.

7. A battery module assembly according to claim 6, characterized in that: The fixing mechanism comprises two insulating sheets spaced apart at the ends of the battery cell units and a fixing belt wound around the battery cell units and the insulating sheets.

8. A battery module assembly according to claim 6, characterized in that: The fixing mechanism comprises two end plates which are spaced apart and arranged at the ends of the battery core unit; two ends of the two end plates are respectively connected by a side plate.

9. A battery module assembly according to claim 8, characterized in that: An insulating film is provided on one side of the side plate close to the battery cell unit.

10. A battery module assembly according to claim 4, characterized in that: The collection board is arranged on the battery cell unit; and the single battery cells in the battery cell unit are connected to the collection board; and a protective cover is also provided on the collection board.

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