Power battery module and battery pack

Abstract

The utility model relates to the technical field of power batteries, in particular to a power battery module and a battery pack. The power battery module comprises a battery cell assembly, a PTC heating assembly and a fixing assembly. The PTC heating assembly comprises a plurality of PTC heating plates which are arranged in a segmented mode. The fixing assembly is arranged on the battery cell assembly, and the PTC heating plate is fixed on the battery cell assembly through the fixing assembly, so that the PTC heating plate is tightly attached to the battery cell assembly. The PTC heating assembly is arranged in a segmented manner, namely, the PTC heating assembly is divided into a plurality of PTC heating plates, so that the assembly difficulty and the assembly error of the PTC heating plates can be reduced, the working efficiency is improved, and the cost is saved. Through the arrangement of the fixing assembly, the PTC heating plate can be tightly attached to the battery cell assembly, so that a gap between the battery cell assembly and the PTC heating plate is avoided, the heating efficiency of the PTC heating plate on the battery cell assembly is improved, and the cost is saved.

Description

Technical Field

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

[0002] With the development of economy and the progress of science and technology, power battery, as one of the main power sources of new energy vehicles, plays a vital role in the development of new energy. Usually, PTC is installed on the battery module, which is mainly used to heat the battery cells in the battery module so that the battery cells can work within the ideal temperature range.

[0003] The battery cells and PTC in the power battery module of the prior art are not closely fitted, resulting in unsatisfactory heating effect of PTC on the battery cells, reducing heating efficiency and increasing costs; at the same time, the current PTC assembly difficulty and assembly error are relatively large, thereby reducing work efficiency.

[0004] Therefore, it is urgent to design a power battery module and a battery pack to solve the above technical problems. Utility Model Content

[0005] The first purpose of the utility model is to provide a power battery module, in which the PTC heating plate is closely fitted to the battery core assembly to improve the heating efficiency; reduce the assembly difficulty and assembly error of the PTC heating plate, improve work efficiency and save costs.

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

[0007] The utility model provides a power battery module, comprising:

[0008] Battery cell components;

[0009] A PTC heating component, wherein the PTC heating component comprises a plurality of PTC heating plates arranged in sections;

[0010] A fixing component is arranged on the battery core component, and the fixing component fixes the PTC heating plate on the battery core component so that the PTC heating plate and the battery core component are closely fitted.

[0011] As an optional technical solution for a power battery module, a mounting hole is provided on the PTC heating plate, and part of the fixing components passes through the mounting hole and is connected to the PTC heating plate.

[0012] As an optional technical solution for a power battery module, the fixing assembly includes a connecting block, a connecting column and a nut. A connecting groove is provided on the battery cell assembly, the connecting block is accommodated in the connecting groove, the connecting column is connected to the upper end surface of the connecting block, and the connecting column extends out of the connecting groove and is passed through the mounting hole. The nut is threadedly connected to the connecting column, and the nut is pressed against the upper end surface of the PTC heating plate to make the PTC heating plate fit tightly against the battery cell assembly.

[0013] As an optional technical solution for a power battery module, the width of the second opening of the connecting groove is smaller than the width of the connecting block, so that the connecting groove limits the connecting block along the height direction of the battery cell assembly.

[0014] As an optional technical solution for a power battery module, the fixing assembly further includes a washer, which is sleeved on the connecting column and located between the nut and the PTC heating plate.

[0015] As an optional technical solution for a power battery module, the fixing assembly and the mounting hole are both provided in plurality, and the fixing assembly and the mounting hole are provided in a one-to-one correspondence.

[0016] As an optional technical solution for a power battery module, the multiple mounting holes on each of the PTC heating plates are arranged at equal intervals.

[0017] As an optional technical solution for a power battery module, a thermally conductive silicone pad is further provided between the PTC heating plate and the battery cell assembly, and two opposite surfaces of the thermally conductive silicone pad are tightly fitted to the PTC heating plate and the battery cell assembly respectively.

[0018] As an optional technical solution for a power battery module, a side of the PTC heating plate away from the battery cell assembly is provided with reinforcing ribs.

[0019] A second objective of the utility model is to provide a battery pack having high assembly efficiency and heating efficiency, small assembly error and assembly difficulty, and low production cost.

[0020] To achieve this purpose, the utility model adopts the following technical solutions:

[0021] The utility model provides a battery pack, which comprises a battery management system and the above-mentioned power battery module, wherein the power battery module is electrically connected to the battery management system.

[0022] The beneficial effects of the utility model include at least:

[0023] The utility model provides a power battery module, which includes a battery cell assembly, a PTC heating assembly and a fixed assembly. Among them, the PTC heating assembly includes a plurality of PTC heating plates arranged in sections. The fixed assembly is arranged on the battery cell assembly, and the fixed assembly fixes the PTC heating plate on the battery cell assembly so that the PTC heating plate and the battery cell assembly fit closely. By arranging the PTC heating assembly in sections, that is, dividing the PTC heating assembly into a plurality of PTC heating plates for arrangement, the assembly error of the operator when assembling the PTC heating assembly can be reduced, thereby ensuring the heating efficiency. At the same time, arranging the PTC heating assembly in sections can also reduce the assembly difficulty of the operator, save time and effort, and improve the work efficiency of the operator. In addition, arranging the PTC heating assembly in sections into a plurality of PTC heating plates can also facilitate the maintenance and repair of the power battery module in the later stage. When the after-sales personnel detect that a certain battery cell has a fault, the operator only needs to remove the PTC heating plate above the battery cell to maintain the battery cell without removing all the PTC heating plates, which saves time and effort and improves work efficiency. By setting the fixing component, the PTC heating plate and the battery cell component can be closely fitted, thereby avoiding a gap between the battery cell component and the PTC heating plate, improving the heating efficiency of the PTC heating plate on the battery cell component and saving costs.

[0024] The utility model also provides a battery pack, which has high assembly efficiency and heating efficiency, small assembly error and assembly difficulty, and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of a power battery module provided by an embodiment of the utility model;

[0027] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0028] Figure 3 An exploded view of a power battery module provided by an embodiment of the utility model;

[0029] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0030] Figure 5This is a schematic diagram of the structure of the fixing assembly provided in an embodiment of the utility model.

[0031] Reference numerals

[0032] 100, battery cell assembly; 110, connecting groove; 200, PTC heating plate; 210, mounting hole; 220, reinforcing rib; 300, fixing assembly; 310, connecting block; 320, connecting column; 330, nut; 340, washer; 400, thermal conductive silicone pad. DETAILED DESCRIPTION

[0033] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] In the description of this embodiment, unless otherwise specified, the term "plurality" refers to a quantity of two or more than two.

[0038] The present embodiment provides a power battery module, in which the PTC heating plate and the battery cell assembly are tightly fitted, thereby improving the heating efficiency; reducing the assembly difficulty and assembly error of the PTC heating plate, improving work efficiency and saving costs.

[0039] like Figure 1-Figure 5 As shown, the power battery module mainly includes a battery cell assembly 100, a PTC heating assembly and a fixing assembly 300. Among them, the PTC heating assembly includes a plurality of PTC heating plates 200 arranged in sections. The fixing assembly 300 is arranged on the battery cell assembly 100, and the fixing assembly 300 fixes the PTC heating plate 200 on the battery cell assembly 100 so that the PTC heating plate 200 and the battery cell assembly 100 are closely fitted.

[0040] Based on the above design, in this embodiment, by setting the PTC heating component in sections, that is, dividing the PTC heating component into several PTC heating plates 200 for setting, it is possible to reduce the assembly error of the operator when assembling the PTC heating component, so that the heating area of ​​the PTC heating component is as close to the battery cell assembly 100 as possible, thereby ensuring the heating efficiency. At the same time, the segmented setting of the PTC heating component can also reduce the assembly difficulty of the operator, save time and effort, and improve the work efficiency of the operator. In addition, setting the PTC heating component in sections into several PTC heating plates 200 can also facilitate the maintenance and repair of the power battery module in the later stage. When the after-sales staff detects that a certain battery cell has a fault, the operator only needs to remove the PTC heating plate 200 above the battery cell to maintain the battery cell, without removing all the PTC heating plates 200, saving time and effort, and improving work efficiency. Moreover, in this embodiment, the PTC heating component is segmented into several PTC heating plates 200, which can reduce the production and manufacturing cost of the PTC heating component and improve economic efficiency.

[0041] By setting the fixing component 300, the PTC heating plate 200 can be closely fitted to the battery cell component 100, thereby avoiding a gap between the battery cell component 100 and the PTC heating plate 200, improving the heating efficiency of the PTC heating plate 200 on the battery cell component 100, and saving costs.

[0042] Optionally, the battery cell assembly 100 in this embodiment includes a plurality of battery cells, and the plurality of battery cells are connected in parallel or in series.

[0043] like Figure 3 As shown, in this embodiment, a mounting hole 210 is opened on the PTC heating plate 200 , and a part of the fixing assembly 300 passes through the mounting hole 210 and is connected to the PTC heating plate 200 .

[0044] Specifically, the PTC heating plate 200 in this embodiment can be set to two, three, four, etc., the fixing assembly 300 and the mounting hole 210 are both set to multiple, and the fixing assembly 300 and the mounting hole 210 are set in a one-to-one correspondence. For example, the fixing assembly 300 and the mounting hole 210 are both set to eight, ten, twelve, etc. The multiple mounting holes 210 on each PTC heating plate 200 are arranged at equal intervals, thereby improving the stress condition of the PTC heating plate 200, avoiding stress concentration on the PTC heating plate 200, and at the same time ensuring that the lower surface of the PTC heating plate 200 is in close contact with the battery cell assembly 100 as much as possible.

[0045] Furthermore, if Figure 3-Figure 5 As shown, the fixing assembly 300 in this embodiment includes a connecting block 310, a connecting column 320 and a nut 330. The battery cell assembly 100 is provided with a connecting groove 110, the connecting block 310 is accommodated in the connecting groove 110, the connecting column 320 is connected to the upper end surface of the connecting block 310, and the connecting column 320 extends out of the connecting groove 110 and is penetrated in the mounting hole 210, the nut 330 is threadedly connected to the connecting column 320, and the nut 330 is pressed against the upper end surface of the PTC heating plate 200 so that the PTC heating plate 200 and the battery cell assembly 100 are closely fitted. In other words, the mounting hole 210 of the PTC heating plate 200 in this embodiment passes through the connecting column 320, and then the nut 330 is screwed on the connecting column 320 to fasten the PTC heating plate 200 to the battery cell assembly 100, and the PTC heating plate 200 and the battery cell assembly 100 can be closely fitted.

[0046] The connection groove 110 in this embodiment is a through groove, that is, along the length direction of the power battery module, both ends of the connection groove 110 have a first opening, so that the connection block 310 can be easily inserted into the connection groove 110. The top of the connection groove 110 also has a second opening, so that the connection column 320 can pass through the connection groove 110. Preferably, two connection grooves 110 are provided in this embodiment, and the two connection grooves 110 are arranged in parallel.

[0047] Furthermore, the connection groove 110 in this embodiment can not only install the fixing assembly 300, but also the width of the second opening of the connection groove 110 is smaller than the width of the connection block 310, so that the connection groove 110 limits the connection block 310 along the height direction of the battery cell assembly 100, thereby preventing the fixing assembly 300 from being separated from the battery cell assembly 100, and improving the reliability and stability of the power battery module. It can be understood that the first opening and the second opening are connected.

[0048] like Figure 3-Figure 5As shown, in this embodiment, the fixing assembly 300 further includes a washer 340, which is sleeved on the connecting column 320 and is located between the nut 330 and the PTC heating plate 200. The arrangement of the washer 340 can improve the stress of the PTC heating plate 200 and avoid the stress concentration of the PTC heating plate 200. At the same time, it can also play a certain protective role on the PTC heating plate 200 and prevent the nut 330 from damaging the PTC heating plate 200.

[0049] Optionally, the fixing assembly 300 in this embodiment is made of metal material to improve the strength of the fixing assembly 300 and extend its service life.

[0050] like Figure 2-Figure 3 As shown, a thermally conductive silicone pad 400 is further provided between the PTC heating plate 200 and the battery cell assembly 100 in this embodiment, and the two opposite sides of the thermally conductive silicone pad 400 are tightly fitted with the PTC heating plate 200 and the battery cell assembly 100 respectively. The provision of the thermally conductive silicone pad 400 facilitates heat transfer between multiple battery cells to maintain the temperature balance of the power battery module and extend the service life of the power battery module. At the same time, the provision of the thermally conductive silicone pad 400 has the effects of buffering and shock absorption, reduces the risk of the battery cell assembly 100 being damaged by the outside world, and improves the reliability of the power battery module.

[0051] like Figure 3 As shown, the PTC heating plate 200 in this embodiment is provided with a reinforcing rib 220 on one side away from the battery cell assembly 100. By way of example, a plurality of reinforcing ribs 220 may be provided on each PTC heating plate 200. For example, two, three, four, etc. reinforcing ribs 220 may be provided on each PTC heating plate 200, thereby improving the strength of the PTC heating plate 200, extending the service life, and saving costs. This embodiment does not specifically limit the shape and number of the reinforcing ribs 220.

[0052] This embodiment also provides a battery pack, which includes a battery management system and the above-mentioned power battery module, and the power battery module is electrically connected to the battery management system to prevent or avoid abnormal conditions such as over-discharge, over-charge or over-temperature of the battery cell. The battery pack has high assembly efficiency and heating efficiency, small assembly error and assembly difficulty, and low production cost.

[0053] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0054] Note that in the description of this specification, the reference terms "some embodiments", "other embodiments", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A power battery module, characterized in that: include: A battery cell assembly (100); A PTC heating component, the PTC heating component comprising a plurality of PTC heating plates (200) arranged in sections; A fixing component (300), the fixing component (300) being arranged on the battery core component (100), and the fixing component (300) fixing the PTC heating plate (200) on the battery core component (100); The PTC heating plate (200) is provided with a mounting hole (210), and part of the fixing assembly (300) passes through the mounting hole (210) to be connected to the PTC heating plate (200); The fixing assembly (300) comprises a connecting block (310), a connecting column (320) and a nut (330); a connecting groove (110) is provided on the battery cell assembly (100); the connecting block (310) is accommodated in the connecting groove (110); the connecting column (320) is connected to the upper end surface of the connecting block (310); the connecting column (320) extends out of the connecting groove (110) and is inserted into the mounting hole (210); the nut (330) is threadedly connected to the connecting column (320); and the nut (330) is pressed against the upper end surface of the PTC heating plate (200) so that the PTC heating plate (200) and the battery cell assembly (100) are tightly fitted.

2. The power battery module according to claim 1, characterized in that: The width of the second opening of the connection groove (110) is smaller than the width of the connection block (310), so that the connection groove (110) limits the connection block (310) along the height direction of the battery cell assembly (100).

3. The power battery module according to claim 1, characterized in that: The fixing assembly (300) further comprises a washer (340), wherein the washer (340) is sleeved on the connecting column (320), and the washer (340) is located between the nut (330) and the PTC heating plate (200).

4. The power battery module according to claim 1, characterized in that: The fixing components (300) and the mounting holes (210) are both provided in plurality, and the fixing components (300) and the mounting holes (210) are provided in a one-to-one correspondence.

5. The power battery module according to claim 4, characterized in that: The plurality of mounting holes (210) on each of the PTC heating plates (200) are arranged at equal intervals.

6. The power battery module according to any one of claims 1 to 5, characterized in that: A thermally conductive silicone pad (400) is further provided between the PTC heating plate (200) and the battery cell assembly (100), and two opposite surfaces of the thermally conductive silicone pad (400) are respectively tightly fitted to the PTC heating plate (200) and the battery cell assembly (100).

7. The power battery module according to any one of claims 1 to 5, characterized in that: A reinforcing rib (220) is protrudingly provided on a side of the PTC heating plate (200) away from the battery core assembly (100).

8. A battery pack, characterized in that: The battery pack comprises a battery management system and a power battery module according to any one of claims 1 to 7, and the power battery module is electrically connected to the battery management system.

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