Packaging structure of energy storage equipment and energy storage equipment

Abstract

The utility model discloses a packaging structure of energy storage equipment and the energy storage equipment, the packaging structure comprises a support used for fixing a battery cell, an acquisition plate fixed on the support, a bayonet arranged on the surface of the support and a hasp piece arranged on the acquisition plate, and the hasp piece is matched with a buckle and used for clamping the acquisition plate and the support. The clamping buckle is arranged on the surface of the support, and the hasp piece matched with the clamping buckle is arranged on the collecting plate, so that clamping connection of the collecting plate and the support is achieved. The collecting plate is clamped with the support, the stability is reliable, meanwhile, the clamping buckle and the hasp piece occupy small space, the space utilization rate is increased, and assembling and repeated disassembling and assembling are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to a packaging structure of energy storage equipment and the energy storage equipment. Background Art

[0002] The working principle of the energy storage device is to convert chemical energy into electrical energy through the participation of the electrode components in the battery cell in the electrochemical reaction, and then power the circuit through the lead wire. The energy storage device includes an acquisition board, which is usually equipped with an acquisition circuit and a control circuit. When the energy storage device is working, the acquisition circuit collects the electrical signals and operating parameters such as temperature of the battery cell, and the control circuit processes the collected electrical signals and temperature parameters to control the input and output status of the battery cell. When the battery is in an overcharged or over-discharged state, the acquisition board sends a signal to stop charging or discharging based on the collected electrical signals to avoid battery damage or safety hazards. At the same time, the acquisition board is also used to monitor the temperature of the battery and control the charge and discharge status of the battery according to the temperature of the battery cell to ensure the safe operation of the lithium battery.

[0003] The energy storage device's collection board is usually fixed to the outer surface of the battery support and is electrically connected to the battery through an electrode connector. The existing collection board fixing structure mainly includes screw fixing, block tightening, and welding fixing.

[0004] Screw fixing is the most widely used traditional fixing structure for existing energy storage devices. This structure requires screw holes or embedded nuts on the surface of the bracket, and the collection board is fixed to the bracket by the combination of screws and screw holes or nuts. The stability of the collection board using this structure is relatively reliable, but since nuts or screw holes need to be reserved, it not only reduces the space utilization of the energy storage device, affects the energy density of the battery, but also increases the cost of manufacturing and assembly.

[0005] The clamp fastening is to first fix the acquisition board on the positioning column of the bracket. After the acquisition board is constrained by the positioning column, a clamp is installed at the tail of the positioning column, and a downward pressure is applied to the acquisition board through the clamp, thereby fixing the acquisition board on the surface of the bracket. The use of this structure requires a clearing position corresponding to the clamp to be reserved on the acquisition board. No components can be arranged on this clearing position, which wastes a lot of space and reduces the space utilization of the acquisition board.

[0006] Welding fixation is to connect the acquisition board and the electrode assembly by resistance spot welding or soldering, so that the acquisition board and the bracket are fixedly connected through the welding point. Since this structure does not have any external fixing structure, it only relies on the structural strength of the welding point itself to maintain the fixation of the acquisition board. This is easy to cause the welding point to break under the action of external force, resulting in a high failure rate of the equipment and bringing certain safety hazards. Utility Model Content

[0007] The embodiments of the utility model aim to provide a packaging structure of an energy storage device and an energy storage device, which can at least solve one of the technical problems existing in the prior art.

[0008] The utility model embodiment solves its technical problems by adopting the following technical solutions:

[0009] The present application discloses a packaging structure of an energy storage device, the packaging structure comprising a bracket for fixing a battery cell, and a collection board fixed to the bracket, and further comprising:

[0010] A buckle, wherein the buckle is arranged on the surface of the bracket;

[0011] A buckle piece, the buckle piece is arranged on the collection plate, the buckle piece is adapted to the buckle, and is used for clamping the collection plate and the bracket.

[0012] In this way, by setting a buckle on the surface of the bracket and setting a buckle piece matching the buckle on the collection board, the collection board and the bracket are connected. The collection board and the bracket are connected firmly and reliably, and the buckle and the buckle piece occupy little space, thus improving space utilization and facilitating assembly and repeated disassembly.

[0013] In a possible implementation, the buckle includes a baffle plate arranged perpendicular to the surface of the bracket, the root of the baffle plate is fixedly connected to the bracket, the end of the baffle plate is away from the bracket, and the root of the baffle plate is provided with a slot parallel to the surface of the bracket;

[0014] The buckle comprises a card arranged on the collection plate, and the card is matched with the card slot.

[0015] By arranging the card to match the card slot, the acquisition board is pushed toward the bracket in a direction perpendicular to the surface of the bracket during assembly, so that the card enters the card slot, and the acquisition board and the bracket can be connected.

[0016] In a possible embodiment, the buckle also includes an elastic portion for generating elastic deformation in a direction perpendicular to the surface of the baffle, the elastic portion extending from the end of the baffle toward the slot, and both ends of the slot are also provided with slots extending toward the end of the baffle, and the slot and the slot are enclosed to form the elastic portion.

[0017] By setting an elastic part on the surface of the baffle, when the collection board is assembled, the card acts on the elastic part, causing it to produce elastic deformation in a direction perpendicular to the baffle, providing space for the card to move, and when the card enters the card slot, the elastic part returns to its original position. This structure enables the buckle to have a certain elastic deformation ability, avoids damage during the installation process, and facilitates repeated disassembly and assembly of the collection board.

[0018] In a possible implementation, a pressing sheet perpendicular to the baffle is further provided at one end of the elastic portion facing the card slot, and the pressing sheet is used to prevent the collection board from falling out of the card slot.

[0019] Since the baffle is a thin sheet structure, the card may fall out of the card slot when the external force is large. By arranging a pressing sheet at one end of the elastic part facing the card slot, the depth of the card slot can be extended to ensure that the card will not fall out of the card slot actively.

[0020] In a possible implementation, the buckle further includes support plates disposed on both sides of the baffle, the bottom of the support plate is fixedly connected to the bracket, and the side edges of the support plate are fixedly connected to the baffle.

[0021] By arranging support plates on both sides of the baffle, the structural strength of the baffle is enhanced and its service life is extended without increasing the thickness of the baffle.

[0022] In a possible implementation, the buckle also includes a clearance groove provided on the collection plate, the clearance groove is opened on both sides of the card, the clearance groove is matched with the support plate, and is used for allowing the support plate to pass through the collection plate during assembly.

[0023] By setting avoidance grooves on both sides of the card, the support plate can pass through the avoidance groove during assembly so that the acquisition plate can be pushed toward the bracket, and then the card can enter between the two support plates until it is inserted into the slot, thereby realizing the connection between the acquisition plate and the bracket.

[0024] In a possible implementation, the top of the support plate is configured as an arc-shaped structure that is convenient for insertion into the avoidance groove during assembly.

[0025] By setting the top of the support plate to be arc-shaped, the size of the top of the support plate is smaller than the air avoidance groove, which plays a guiding role during assembly, making it easier for the support plate to pass through the air avoidance groove, making the installation of the collection board more convenient.

[0026] In a possible implementation manner, the buckle is arranged on an edge of the bracket, and the card corresponding to the buckle is arranged on an edge of the acquisition board.

[0027] The buckle is set on the edge of the bracket, and the corresponding card is set on the edge of the acquisition board, which is convenient for production, processing and assembly, and does not affect the overall layout of the components on the acquisition board.

[0028] In a possible implementation manner, the baffle is a plastic baffle with elastic deformation capability.

[0029] In a possible implementation manner, the height of the card slot is greater than the thickness of the card to form an assembly gap.

[0030] According to the second aspect of the present application, the present application further discloses an energy storage device, comprising:

[0031] Battery cells;

[0032] The packaging structure described above;

[0033] The electrode connector is used to electrically connect the battery cell to the collection board of the packaging structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0035] Figure 1 It is a schematic diagram of the overall structure of the energy storage device of the utility model;

[0036] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0037] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0038] Figure 4 An exploded diagram of the energy storage device of the utility model;

[0039] Figure 5 This is a schematic diagram of the structure of the acquisition board in the embodiment of the utility model;

[0040] Figure 6 This is a front view of the bracket in the embodiment of the utility model;

[0041] Figure 7 for Figure 6 Middle AA section view;

[0042] Figure 8 This is a schematic diagram of the assembly of the lower shell in the embodiment of the utility model;

[0043] Fig. 9 This is a schematic diagram of the upper shell assembly in the embodiment of the utility model;

[0044] Fig.10 This is a schematic diagram of the assembly of the electrode connector in the embodiment of the utility model;

[0045] Fig.11 This is a schematic diagram of the assembly of a PC insulating sheet in an embodiment of the utility model.

[0046] Figure numbers and corresponding meanings:

[0047] Battery cell 1, pole piece 10, busbar 11, PC insulating sheet 12;

[0048] Bracket 2, upper shell 21, lower shell 22;

[0049] Acquisition board 3;

[0050] Buckle 4, baffle 40, slot 41, elastic portion 42, slot 43, pressing sheet 44, support plate 45;

[0051] The buckle 5, the card 51, and the air-avoiding groove 52. DETAILED DESCRIPTION

[0052] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element, or there can be one or more centered elements between them. When an element is described as "connected" to another element, it can be directly connected to another element, or there can be one or more centered elements between them. The orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or position relationship shown in the accompanying drawings, only for the convenience of describing the utility model 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 utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Unless otherwise defined, the features such as "parallel", "perpendicular" and "same" used in the embodiments of the present invention include "parallel", "perpendicular", "same" and other situations in the strict sense, as well as "approximately parallel", "approximately perpendicular", "approximately the same" and other situations that contain certain errors. For example, the above-mentioned "approximately" may mean that the difference between the compared objects is 10% of the average value of the compared objects, or within 5%. When the number of a component or element is not specifically specified below in the embodiments of the present invention, it means that the component or element may be one or more, or may be understood as at least one. "At least one" refers to one or more, and "multiple" refers to at least two.

[0053] Unless otherwise defined, all technical and scientific terms used in this specification 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 in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0054] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the described embodiments of 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.

[0055] The energy storage device disclosed in this embodiment is as follows: Figure 1-Figure 4 As shown, it includes a plurality of battery cells 1 and a packaging structure arranged outside the battery cells 1. The packaging structure includes a bracket 2 for fixing the battery cells 1, and a collection board 3 fixed to the bracket 2, and the collection board 3 is electrically connected to the battery cells 1 through an electrode connector. The packaging structure also includes a buckle 4 arranged on the surface of the bracket 2, and a buckle 5 arranged on the collection board, the buckle 4 is adapted to the buckle 5, and the collection board 3 is clamped with the bracket through the buckle 4 and the buckle 5.

[0056] In this way, by setting a buckle 4 on the surface of the bracket 2 and setting a buckle 5 that matches the buckle 4 on the collection plate 3, the collection plate 3 and the bracket 2 are connected by a buckle. The collection plate 3 and the bracket 2 are fixedly connected by a buckle structure, which is more reliable. At the same time, the buckle 4 and the buckle 5 occupy less space, which improves the space utilization. During assembly, as long as the collection plate 3 is pressed on the surface of the bracket 2 according to the assembly direction, so that the buckle 4 and the buckle 5 are clamped, the installation of the collection plate 3 can be completed. Compared with the traditional fixed structure, the assembly difficulty is greatly reduced and the assembly time is shortened, thereby improving the production efficiency of the product.

[0057] like Figure 1-Figure 5 As shown, the buckle 4 is arranged on the edge of the bracket 2 , and the buckle 5 is arranged on the edge of the collection plate 3 corresponding to the buckle 4 .

[0058] By arranging the buckle 4 on the edge of the bracket 2 and the corresponding buckle 5 on the edge of the acquisition board 3 , it is convenient for production, processing and assembly without affecting the overall layout of components on the acquisition board 3 .

[0059] like Figure 2-Figure 3 As shown, the buckle 4 includes a baffle 40 arranged perpendicular to the surface of the bracket 2, the root of the baffle 40 is fixedly connected to the bracket 2, and the end of the baffle 40 is away from the bracket 2. A card slot 41 parallel to the surface of the bracket 2 is opened at the root of the baffle 40. Correspondingly, the buckle 5 includes a card 51 arranged on the collection board 3, and the card 51 is adapted to the card slot 41. During assembly, the collection board 3 is pushed toward the bracket 2 in a direction perpendicular to the surface of the bracket 2, so that the card 51 enters the card slot 41, and the collection board 3 and the bracket 2 can be connected.

[0060] During the engagement of the card 51 with the card slot 41, as the collection plate 3 moves toward the direction close to the bracket 2, the card 51 continuously squeezes the baffle 40, causing the baffle 40 to produce elastic deformation. When the card 51 moves to the position where the card slot 41 is facing, the card 51 is inserted into the card slot 41, and the external force applied to the baffle 40 disappears instantly, and the baffle 40 is reset. Therefore, the baffle 40 has a certain elastic deformation ability. In this embodiment, the baffle 40 is a plastic baffle made of a plastic material with elastic deformation ability. At the same time, in order to allow the card 51 to smoothly enter the card slot 41, in this embodiment, the height of the card slot 41 is greater than the thickness of the card 51, so that an assembly gap d is formed between the two. This can effectively prevent the card 51 from being stuck outside the card slot 41, reserve enough space for the card 51 to move, and reserve enough tolerance space for production and processing.

[0061] Specifically, in this embodiment, Figure 6-Figure 7 As shown, the height of the card slot 41 is 1.9 mm, and the thickness of the card 51 is 1.6 mm (ie, the thickness of the collection board 3 is 1.6 mm), so that the assembly gap d between the height of the card slot 41 and the thickness of the card 51 is 0.3 mm.

[0062] like Figure 3 As shown, the buckle 4 also includes an elastic portion 42 for generating elastic deformation in a direction perpendicular to the surface of the baffle 40. The elastic portion 42 extends from the end of the baffle 40 to the slot 41. Both ends of the slot 41 are also provided with slots 43 extending toward the end of the baffle 40. The slot 43 and the slot 43 enclose a rectangular or U-shaped elastic portion 42.

[0063] In this way, by providing the elastic part 42 on the surface of the baffle 40, when the collection board 3 is assembled, the card 51 acts on the elastic part 42, so that the end of the elastic part 42 facing the card slot 41 generates elastic deformation in a direction perpendicular to the baffle 40, providing an escape space for the movement of the card 51, so that the collection board 3 can continue to move toward the bracket 2. When the card 51 enters the card slot 41, the external force acting on the elastic part 42 disappears, and the elastic part 42 returns to its original position.

[0064] By adopting such a structure, the elastic deformation of the elastic part 42 relative to the baffle 40 and the elastic deformation of the baffle 40 itself are superimposed on each other, thereby increasing the overall elastic deformation capacity of the buckle 4, providing a larger avoidance space for the movement of the card 51, and avoiding damage caused by excessive squeezing between the card 51 and the baffle 40 during installation, thereby facilitating repeated disassembly and assembly of the collection plate 3 and increasing the service life of the product.

[0065] Since the baffle 40 is a thin sheet structure, when the external force is large, the card 51 may fall out of the card slot 41, thereby causing the collection board 3 to fall off accidentally. In order to solve this problem, a pressing piece 44 perpendicular to the baffle 40 is further provided at one end of the elastic part 42 facing the card slot 41.

[0066] By providing a pressing piece 44 at one end of the elastic portion 42 facing the card slot 41, it is equivalent to extending the depth of the card slot 41 in a direction perpendicular to the baffle 40, thereby ensuring that the card 51 will not actively fall out of the card slot 41, playing a role in preventing the collection plate 3 from accidentally falling off, and further increasing the firmness of the collection plate 3.

[0067] In addition, since the baffle 40 is a thin sheet structure, in order to prevent the baffle 40 from breaking, the buckle 4 in this embodiment also includes support plates 45 arranged on both sides of the baffle 40, the bottom of the support plate 45 is fixedly connected to the surface of the bracket 2, and the side of the support plate 45 is fixedly connected to the side of the baffle 40. The support plate 45 and the baffle 40 can be arranged to be perpendicular to each other, and can also be arranged to form an obtuse angle between the two.

[0068] By arranging support plates 45 on both sides of the baffle plate 40 , the structural strength of the baffle plate 40 is enhanced without increasing the thickness of the baffle plate 40 , thereby preventing the baffle plate 40 from breaking and extending the service life of the buckle 4 .

[0069] like Figure 5 As shown, the buckle 5 also includes a clearance groove 52 provided on the collection plate 3, the clearance groove 52 is opened on both sides of the card 51, and the size of the clearance groove 52 matches the support plate 45, which is used for the support plate 45 to pass through the collection plate 3 during assembly. That is, the part between the two clearance grooves 52 on the collection plate 3 serves as the card 51.

[0070] By providing avoidance grooves 52 on both sides of the card 51, the support plate 45 can pass through the avoidance grooves 52 during assembly, so that the collection plate 3 can be pushed toward the bracket 2, and then the card 51 enters between the two support plates 45, and as the collection plate 3 moves until it is inserted into the card slot 41, the collection plate 3 and the bracket 2 are connected.

[0071] In this embodiment, in order to facilitate the alignment of the support plate 45 and the air-avoiding groove 52, the top of the support plate 45 is set to an arc structure. In this way, by setting the top of the support plate 45 to an arc shape, the size of the top of the support plate 45 is smaller than the air-avoiding groove 52, which plays a guiding role during assembly, making it easier for the support plate 45 to enter the air-avoiding groove 52, making the installation of the collection plate 3 more convenient.

[0072] like Figure 4As shown, the bracket 2 includes an upper shell 21 and a lower shell 22, and the upper shell 21 and the lower shell 22 are clamped together, and the two are buckled to accommodate and fix the battery cell 1. A plurality of buckles 4 are respectively provided on the upper shell 21 and the lower shell 22, so that the collection board 3 has multiple clamping sites on the upper shell 21 and the lower shell 22. The electrode connector includes a plurality of pole pieces 10 located at the top of the upper shell 21 and the bottom of the lower shell 22. The pole pieces 10 electrically connect the collection board 3 and the battery cell 1, so that the collection board 3 can collect various parameters of the battery cell 1. The electrode assembly also includes a busbar 11, and the battery cell 1 is connected in series or in parallel through the pole piece 10, and then connected to the external power supply circuit through the busbar 11. In this embodiment, the pole piece 10 and the busbar 11 are both nickel sheets.

[0073] When assembling energy storage equipment, first Figure 8 As shown, the battery cells 1 are sequentially installed into the lower shell 22 in the order of series or parallel connection. Fig. 9 As shown, the upper shell 21 is installed, and the battery cell 1 is fixed by buckling the upper shell 21 with the lower shell 22 to prevent the battery cell 1 from shaking in the bracket 2. Fig.10 As shown, the pole piece 10 and the busbar 11 are pre-installed on the exposed positive and negative electrodes of the battery cell 1, respectively. After the pole piece 10 and the busbar 11 are placed in the correct position, resistance spot welding is performed. The number of welding points of resistance spot welding depends on the overcurrent of the battery pack and the thickness of the nickel sheet. The specific number of welding points can refer to the resistance spot welding process specification. This embodiment uses a 0.2mm thick nickel sheet with a battery cell 1 rated for an overcurrent of 16A. Each nickel sheet is spot welded at four welding points, and the battery cells 1 can be combined into a battery pack after the nickel sheet is welded as needed. Then as shown in FIG. Fig.11 As shown, a layer of PC insulating sheet 12 is pasted on the nickel sheet to prevent the nickel sheet from being exposed and causing short circuit and explosion. Finally, the acquisition board 3 is installed on the side of the bracket 2. When installing the acquisition board 3, the acquisition board 3 is first pushed toward the side of the bracket 2 along the angle between the buckle 4 and the buckle 5 until the buckle 4 and the buckle 5 are locked together, thereby completing the installation and fixation of the acquisition board 3.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill 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. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A packaging structure of an energy storage device, the packaging structure comprising a bracket for fixing a battery cell, and a collection board fixed to the bracket, characterized in that: Also includes: A buckle, wherein the buckle is arranged on the surface of the bracket; A buckle piece, the buckle piece is arranged on the collection plate, the buckle piece is adapted to the buckle, and is used for clamping the collection plate and the bracket.

2. The packaging structure of the energy storage device according to claim 1, characterized in that: The buckle comprises a baffle plate arranged perpendicular to the surface of the bracket, the root of the baffle plate is fixedly connected to the bracket, the end of the baffle plate is away from the bracket, and the root of the baffle plate is provided with a slot parallel to the surface of the bracket; The buckle comprises a card arranged on the collection plate, and the card is matched with the card slot.

3. The packaging structure of the energy storage device according to claim 2, characterized in that: The buckle also includes an elastic portion for generating elastic deformation in a direction perpendicular to the baffle surface, the elastic portion extending from the end of the baffle toward the slot, and both ends of the slot are also provided with slots extending toward the end of the baffle, the slot and the slot enclose forming the elastic portion.

4. The packaging structure of the energy storage device according to claim 3, characterized in that: A pressing sheet perpendicular to the baffle is also provided at one end of the elastic portion facing the card slot, and the pressing sheet is used to prevent the collection board from falling out of the card slot.

5. The packaging structure of the energy storage device according to any one of claims 2 to 4, characterized in that: The buckle also includes support plates arranged on both sides of the baffle, the bottom of the support plate is fixedly connected to the bracket, and the side edge of the support plate is fixedly connected to the baffle.

6. The packaging structure of the energy storage device according to claim 5, characterized in that: The buckle also includes a clearance groove arranged on the collection plate, the clearance groove is opened on both sides of the card, and the clearance groove is matched with the support plate to allow the support plate to pass through the collection plate during assembly.

7. The packaging structure of the energy storage device according to claim 6, characterized in that: The top of the support plate is configured as an arc-shaped structure for easy insertion into the air-avoiding groove during assembly.

8. The packaging structure of the energy storage device according to claim 2, characterized in that: The buckle is arranged on the edge of the bracket, and the card corresponding to the buckle is arranged on the edge of the collection board.

9. The packaging structure of the energy storage device according to claim 8, characterized in that: The height of the card slot is greater than the thickness of the card to form an assembly gap.

10. An energy storage device, characterized in that: include: Battery cells; The packaging structure according to any one of claims 1 to 9; The electrode connector is used to electrically connect the battery cell to the collection board of the packaging structure.

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