Battery core group pressurizing device

Abstract

The utility model discloses a pressurizing device for a battery core pack. The pressurizing device comprises an accommodating piece, a pressurizing unit and a plurality of second pressing plates, the containing part is used for installing a plurality of battery cores, the pressurizing unit comprises two pressurizing parts, each pressurizing part comprises a driving mechanism, a spring, a push plate and a first pressing plate, the driving mechanisms are arranged at the two ends of the containing part respectively, the power ends of the driving mechanisms are located in the containing space, the push plates are connected with the driving mechanisms, and the first pressing plates are connected with the push plates through the springs; the plurality of second pressing plates are arranged between the two first pressing plates, a battery core is placed between the adjacent second pressing plates, each second pressing plate comprises a buffer plate and two bearing plates, the two bearing plates are arranged on the two sides of the buffer plate, and the buffer plate is elastic. And the first pressing plate and the second pressing plate can slowly apply pressure to the battery core body, so that the battery core body is prevented from being damaged, the electrolyte in the bag is uniformly spread, and the capacity of the battery is further increased.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery core pack pressurizing device and a shell structure. Background Art

[0002] As we all know, a secondary battery is a device that converts electrical energy supplied from the outside into chemical energy, stores it, and then converts it back into electrical energy when needed. Lithium secondary batteries such as cylindrical batteries and prismatic batteries are classified as pouch-type batteries. In the above-mentioned pouch-type secondary batteries, when charging, the electrolyte filled inside the bag reacts and produces gas, causing the two sides of the bag to swell outward. Therefore, in order to increase the capacity of the battery, the two sides of the bag of the secondary battery are squeezed. Traditional pressurizing equipment usually applies pressure directly on both sides of the battery core pack, which can easily damage the battery core, thereby affecting the performance of the battery core pack. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a battery core pack pressurizing device, in which a first pressing plate and a second pressing plate can slowly apply pressure to the battery core to avoid damage to the battery core, thereby spreading the electrolyte in the bag evenly and increasing the capacity of the battery.

[0004] The technical solution of the utility model is as follows:

[0005] A battery core group pressurizing device includes a container, a pressurizing unit and a plurality of second press plates. The container has an open upper surface and a container space, and the container space is used to install a plurality of battery cores; the pressurizing unit includes two pressurizing members, and the pressurizing members include a driving mechanism, a spring, a push plate and a first press plate, wherein the driving mechanism is respectively arranged at both ends of the container, and the power end of the driving mechanism is located in the container space, the push plate is connected to the driving mechanism, and can perform linear motion along the length direction of the container under the action of the driving mechanism, and the first press plate is connected to the push plate through the spring; a plurality of second press plates are arranged between two first press plates, and the battery cores are placed between adjacent second press plates, and the second press plate includes a buffer plate and two pressure plates, and the two pressure plates are arranged on both sides of the buffer plate, and the buffer plate has elasticity.

[0006] Preferably, there are multiple springs, which are evenly arranged between the push plate and the first pressure plate.

[0007] Preferably, it further comprises a guide portion, which is arranged on both sides of the accommodating member and extends along the length direction of the accommodating member, and the second pressing plate is connected to the guide portion so as to be able to move linearly along the guide portion.

[0008] Specifically, the guide portion is a guide plate, a guide groove is provided on the inner wall of the guide plate, and protrusions matching the guide groove are provided on both sides of the second pressing plate.

[0009] Specifically, the guide portion is a guide rod, the guide rod is connected to the accommodating member and extends along the length direction of the accommodating member, through holes are provided on both sides of the second pressing plate, and the second pressing plate is connected to the guide rod through the through holes.

[0010] Preferably, the thickness of the second pressing plate is set between 20-50 mm.

[0011] Preferably, the thickness of the buffer plate is greater than the thickness of the pressure plate.

[0012] Specifically, the buffer plate is a rubber plate, and the pressure-bearing plate is a metal plate or a hard plastic plate.

[0013] Preferably, the pressurizing units are in multiple groups, and the multiple groups of pressurizing units are arranged.

[0014] Specifically, the driving mechanism is a hydraulic cylinder.

[0015] The beneficial effects of the utility model are:

[0016] A spring and a first pressure plate connected to the push plate are arranged on the inner side of the push plate, and the second pressure plate between adjacent battery cells is also composed of a buffer plate and two pressure plates. During the extrusion process, the first pressure plate and the second pressure plate can slowly apply pressure to the battery cell to avoid damage to the battery cell and make the gap between each battery cell as compact as possible, so that the electrolyte in the bag is evenly spread, thereby increasing the capacity of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0018] In the attached picture:

[0019] Figure 1 It is a front view of the first embodiment of the battery core pack pressurizing device of the utility model;

[0020] Figure 2 A top view of a first embodiment of a battery core pack pressurizing device according to the utility model;

[0021] Figure 3 It is a top view of the second embodiment of the battery core pack pressurizing device of the utility model.

[0022] The components represented by the reference numerals are:

[0023] 1 first pressure plate, 2 spring, 3 push plate, 4 driving mechanism, 5 receiving member, 6 buffer plate, 7 pressure plate, 8 guide plate, 9 guide rod, 10 battery core. DETAILED DESCRIPTION

[0024] See also Figures 1 to 3 The utility model provides a battery core pack pressurizing device, including a receiving member 5, a pressurizing unit and a plurality of second press plates.

[0025] The container 5 has an open upper surface and a containing space, and the containing space is used to install a plurality of battery cells. Specifically, the container 5 may include a bottom plate and a plurality of side plates, and the plurality of side plates are fixed on the bottom plate.

[0026] The pressurizing unit includes two pressurizing members, which include a driving mechanism 4, a spring 2, a push plate 3 and a first press plate 1, wherein the driving mechanism 4 is respectively arranged at both ends of the accommodating member 5, that is, the driving mechanism 4 is fixed on two opposite side plates of the accommodating member 5, and the power end of the driving mechanism 4 is located in the accommodating space, the push plate 3 is connected to the driving mechanism 4, and can perform linear motion along the length direction of the accommodating member 5 under the action of the driving mechanism 4, and the first press plate 1 is connected to the push plate 3 through the spring 2. By arranging the spring 2 between the push plate 3 and the first press plate 1, the impact of the first press plate 1 on the battery core can be reduced, so that the first press plate 1 slowly presses the battery core to avoid damage to the battery core.

[0027] Specifically, the driving mechanism 4 is a hydraulic cylinder, and its piston rod is located in the accommodation space of the accommodation member 5. The hydraulic cylinder has a small inertia and can reduce the impact on the battery core.

[0028] A plurality of second pressing plates are arranged between two first pressing plates 1, and the battery core is placed between adjacent second pressing plates. The second pressing plates include a buffer plate 6 and two pressure-bearing plates 7, and the two pressure-bearing plates 7 are arranged on both sides of the buffer plate 6. The pressure-bearing plates 7 and the buffer plate 6 can be bonded by colloid, and the buffer plate 6 has elasticity. Through the above arrangement, the impact force of the second pressing plate on the battery core can be reduced, thereby avoiding damage to the battery core, and making the gap between each battery core as compact as possible, so that the electrolyte in the bag is evenly spread, thereby increasing the capacity of the battery.

[0029] Specifically, the buffer plate 6 is a rubber plate, and the pressure plate 7 is a metal plate or a hard plastic plate, so that the pressure plate 7 has a certain support.

[0030] In one embodiment, the number of springs 2 is multiple and evenly arranged between the push plate 3 and the first pressing plate 1, so that the thrust of the push plate 3 is evenly transmitted to the first pressing plate 1 through the springs 2, and then evenly acts on the battery core. For example, the number of springs 2 can be four.

[0031] Optionally, the pressurizing device in the present application also includes a guide portion, which is arranged on both sides of the accommodating member 5 and extends along the length direction of the accommodating member 5. The second pressure plate is connected to the guide portion so that it can move linearly along the guide portion. The guide plate 8 is used to guide the second pressure plate so that the second pressure plate can move linearly.

[0032] It should be noted that the guide portion can adopt different structural forms. For example, the guide portion is a guide plate 8, the inner wall of the guide plate 8 is provided with a guide groove, and protrusions matching the guide groove are provided on both sides of the second pressing plate. The number of guide grooves can be two, and the guide protrusions on the second pressing plate correspond to the guide grooves. In addition, the guide portion can also be a guide rod 9, which is connected to the accommodating member 5 and extends along the length direction of the accommodating member 5. Through holes are provided on both sides of the second pressing plate, and the second pressing plate is connected to the guide rod 9 through the through holes.

[0033] In one embodiment, the thickness of the second pressure plate is set between 20-50 mm. In addition, the thickness of the buffer plate 6 can be appropriately increased so that the thickness of the buffer plate 6 is greater than the thickness of the pressure plate 7 to improve the cushioning property of the second pressure plate.

[0034] Optionally, there are multiple groups of pressurizing units, and the multiple groups of pressurizing units are arranged in parallel, so that multiple battery cell groups can be pressurized.

[0035] The above are only preferred implementations of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery core pack pressurizing device, characterized in that: include: A container (5) having an open upper surface and a container space, wherein the container space is used to install a plurality of battery cells; A pressurizing unit, the pressurizing unit comprising two pressurizing members, the pressurizing members comprising a driving mechanism (4), a spring (2), a push plate (3) and a first press plate (1), wherein the driving mechanism (4) is respectively arranged at both ends of the accommodating member (5), and the power end of the driving mechanism (4) is located in the accommodating space, the push plate (3) is connected to the driving mechanism (4), and can perform linear motion along the length direction of the accommodating member (5) under the action of the driving mechanism (4), and the first press plate (1) is connected to the push plate (3) through the spring (2); A plurality of second pressure plates, wherein the plurality of second pressure plates are arranged between two of the first pressure plates (1), and the battery core is placed between adjacent second pressure plates, wherein the second pressure plates include a buffer plate and two pressure-bearing plates, wherein the two pressure-bearing plates are arranged on both sides of the buffer plate, and the buffer plate is elastic.

2. The battery core pack pressurizing device according to claim 1, characterized in that: The springs (2) are multiple in number and are evenly arranged between the push plate (3) and the first pressure plate (1).

3. The battery core pack pressurizing device according to claim 1, characterized in that: It also includes a guide portion, which is arranged on both sides of the accommodating member (5) and extends along the length direction of the accommodating member (5), and the second pressing plate is connected to the guide portion so as to be able to move linearly along the guide portion.

4. The battery core pack pressurizing device according to claim 3, characterized in that: The guide portion is a guide plate (8), the inner wall of the guide plate (8) is provided with a guide groove, and protrusions matching the guide groove are provided on both sides of the second pressing plate.

5. The battery core pack pressurizing device according to claim 3, characterized in that: The guide portion is a guide rod (9), which is connected to the accommodating member (5) and extends along the length direction of the accommodating member (5). Through holes are provided on both sides of the second pressing plate, and the second pressing plate is connected to the guide rod (9) through the through holes.

6. The battery core pack pressurizing device according to claim 1, characterized in that: The thickness of the second pressing plate is set between 20-50 mm.

7. The battery core pack pressurizing device according to claim 1, characterized in that: The thickness of the buffer plate is greater than the thickness of the pressure bearing plate.

8. The battery core pack pressurizing device according to claim 1, characterized in that: The buffer plate is a rubber plate, and the pressure-bearing plate is a metal plate or a hard plastic plate.

9. The battery core pack pressurizing device according to claim 1, characterized in that: The number of the pressurizing units is multiple groups, and the multiple groups of pressurizing units are arranged.

10. The battery core pack pressurizing device according to claim 1, characterized in that: The driving mechanism (4) is a hydraulic cylinder.

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