Battery pack and battery pack combination

Abstract

The utility model relates to the field of lithium ion batteries, and discloses a battery pack and a battery pack combination. The battery pack comprises a battery pack body, the battery pack body is formed by connecting a plurality of single batteries in series or in parallel or in series and in parallel, a discharge output part 2, a voltage acquisition part and a shell are led out from the top of the battery pack body, the battery pack body is packaged in the shell, and buckle holes and connecting buckles are arranged on the side wall of the shell. Two opposite ends of the connecting buckle are respectively provided with a buckle part, each buckle part is respectively matched with the buckle hole of the shell and can be buckled with the buckle hole, and when one buckle part of the connecting buckle is buckled with one buckle hole of one shell, the buckle part of the connecting buckle can be buckled with the buckle hole of the shell. And the other buckling part of the connecting buckle is positioned outside the side wall of the shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field especially relates to a battery pack and battery pack combination. BACKGROUND

[0002] With the battery application more and more widely, especially the application of lithium ion battery, the equipment using lithium ion battery is also more and more.

[0003] The present inventor found in the research process of the utility model that the lithium ion battery pack has the risk of falling and knocking in the process of use, and the surface of the cell is very easy to scratch, thereby causing short circuit, fire and explosion, which brings hidden danger to product safety. SUMMARY

[0004] One of the purposes of the utility model embodiment is to provide a battery pack kit, which can effectively improve the protection of the product and improve the safety performance of the product.

[0005] The utility model embodiment provides a battery pack, which comprises:

[0006] The battery pack body is composed of a plurality of battery monomers in series or parallel or series and parallel connection, and a discharge output portion 2 and a voltage collection portion are led out at the top of the battery pack body,

[0007] The shell body is encapsulated in the shell, and a buckle hole is arranged on the side wall of the shell,

[0008] The connecting buckle has a buckle portion at two opposite ends, and each buckle portion is matched with the buckle hole of the shell and can be buckled with the buckle hole.

[0009] When one buckle portion of the connecting buckle is buckled with one buckle hole of the shell, the other buckle portion of the connecting buckle is located outside the side wall of the shell.

[0010] Optionally, the shell comprises an insulating tube, a bottom cover fixed to the bottom pipe opening of the insulating tube, and a top cover fixed to the top pipe opening of the insulating tube,

[0011] The battery pack body is encapsulated between the bottom cover and the top cover, and the discharge output portion 2 and the voltage collection portion are protruded from the top cover.

[0012] Optionally, a buckle hidden hole recessed in the inner wall of the side wall of the shell is further arranged on the inner wall of the side wall, and each buckle hidden hole is opposite to and communicates with each buckle hole.

[0013] When one of the clasp portions is buckled with one of the buckle holes, the connecting buckle inserted into the buckle hole is located in the buckle hidden hole and does not protrude from the inner wall of the side wall of the shell.

[0014] Optionally, the outer diameter of the connecting column between the two clasp portions of the connecting buckle is narrower than the hole diameter of each of the buckle holes and narrower than the outer diameter of each of the clasp portions.

[0015] Optionally, each of the connecting buckles is provided with a through hole penetrating the two clasp portions and the connecting column.

[0016] Optionally, each of the clasp portions includes a plurality of clasp fixing portions protruding from the outer periphery of the connecting column around the through hole,

[0017] Any two of the clasp fixing portions adjacent in a ring are notched,

[0018] When one of the clasp portions is buckled with one of the buckle holes, one end of the connecting column penetrates the buckle hole, and each of the clasp fixing portions of one of the clasp portions is located in the buckle hidden hole through the buckle hole.

[0019] Optionally, a chamfered slope is provided on the outer edge of the outer end surface of each of the clasp fixing portions away from the connecting column, and the distance between each point on the chamfered slope and the axis of the through hole gradually decreases in the direction away from the connecting column.

[0020] Optionally, each of the clasp fixing portions is uniformly distributed around the through hole on each of the clasp portions.

[0021] Optionally, at least one of the buckle holes is provided on each of the side walls of the shell.

[0022] In a second aspect, the utility model provides a battery pack combination, including,

[0023] A plurality of above-mentioned battery packs are respectively provided with a connecting buckle on at least one buckle hole of the shell of each of the battery packs,

[0024] One of the clasp portions of each of the connecting buckles is buckled with the buckle hole on the shell of one of the battery packs, and the other clasp portion is buckled with the buckle hole on the shell of another battery pack, and the two sides of any two of the battery packs connected by at least one of the connecting buckles are opposite to each other.

[0025] As can be seen from the above, the battery pack 1 of the embodiment can be used as a power supply alone, the buckle hole serves as a heat dissipation hole, the heat dissipation effect of the battery pack is improved, and accumulation of heat in the shell is avoided to cause danger.

[0026] The plurality of battery packs of the embodiment can also be combined flexibly into a battery pack combination, and the battery pack combination is used as a power supply to provide current to the outside, specifically, a connecting piece is buckled on the buckle hole of the side wall of the shell of each battery pack 1, and each connecting piece combines two battery packs laterally adjacent to each other. Figures 3-11 As shown in the figure, any number of battery packs can be assembled and combined in any direction according to the needs of user application to obtain a battery pack combination, and the discharge output parts of the battery packs can be connected in series or in parallel through a series-parallel circuit structure, and the battery pack combination as a whole outputs current to the outside. Each battery pack can also be used as a power supply to provide power to the outside respectively. The specific application is according to the needs of the user. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings used to provide further understanding of the present application and form a part of the present application, and do not constitute an improper limitation of the present application.

[0028] Figure 1 The battery pack structure diagram provided for the specific embodiment of the present application;

[0029] Figure 2 The battery pack exploded structure diagram provided for the specific embodiment of the present application;

[0030] Figure 3 The exploded structure diagram of a battery pack combination composed of two battery packs provided for the specific embodiment of the present application;

[0031] Figure 4 The assembly structure diagram of a battery pack combination composed of two battery packs provided for the specific embodiment of the present application;

[0032] Figure 5 The exploded structure diagram of a battery pack combination composed of three battery packs provided for the specific embodiment of the present application;

[0033] Figure 6 The assembly structure diagram of a battery pack combination composed of three battery packs provided for the specific embodiment of the present application;

[0034] Figure 7 The exploded structure diagram of a battery pack combination composed of four battery packs provided for the specific embodiment of the present application;

[0035] Figure 8 The assembly structure diagram of a battery pack combination composed of four battery packs provided for the specific embodiment of the present application;

[0036] Figure 9 The Figure 8 The side view structure diagram of the battery pack combination shown in the figure;

[0037] Figure 10 for Figure 9 A schematic diagram of the AA cross-sectional structure of the battery pack assembly shown.

[0038] Figure 11 for Figure 10 A schematic diagram of the BB cross-sectional structure of the battery pack assembly shown.

[0039] Figure 12 A three-dimensional structural diagram of the connecting buckle provided for a specific embodiment of this utility model;

[0040] Figure 13 This is a side view of the connecting buckle provided for a specific embodiment of the present utility model.

[0041] 1: Battery pack;

[0042] 2: Discharge output section; 21: Power connector;

[0043] 3: Voltage acquisition unit; 31: Wiring terminal;

[0044] 4: Insulating tube; 41: Clip hole; 42: Clip concealed hole;

[0045] 5: Connecting buckle; 51: First snap-fit ​​part; 52: Second snap-fit ​​part; 53: Connecting post; 54: Notch; 56: Chamfered bevel; 57: Through hole;

[0046] 6: Bottom cover; 7: Top cover; 71: Cable outlet; 8: Line sheath. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0048] See Figures 1-13 As shown.

[0049] This embodiment provides a battery pack 1, which includes a battery pack 1 body, a housing, and a matching connectable and detachable connector 5.

[0050] Battery pack 1 may be, but is not limited to, a lithium-ion battery pack 1.

[0051] The battery pack 1 is composed of at least two battery cells connected in series or in parallel or a combination of series and parallel. The tabs of the battery pack 1 are used as electrodes of the battery pack 1, and the electrodes of the whole are used as current output terminals to output current to the outside. The specific series and parallel connection schemes between battery cells can be, but are not limited to, those in the prior art.

[0052] The battery monomers are arranged together, and the tabs are located at one end of the battery pack 1. The end where the tabs are located is the top end, and the end opposite to the top end is the bottom end. The surfaces between the top end and the bottom end are the side surfaces.

[0053] The top of the battery pack 1 is provided with a discharge output part 2 and a voltage collection part 3. The discharge output part 2 can be but is not limited to a discharge wire, and the voltage collection part 3 can be but is not limited to a voltage collection wire.

[0054] The discharge output part 2 is electrically connected with the overall positive electrode "+" and the overall negative electrode "-" of the battery pack 1, and outputs current to the outside. The voltage collection part 3 is electrically connected with the electrodes "+" and "-" of each battery monomer constituting the battery pack 1, and realizes voltage sampling of each battery monomer, so as to charge each battery monomer according to the voltage of each battery monomer, balance the voltage and the electric quantity among the battery monomers, and keep the electric quantity of each battery monomer in the battery pack 1 balanced and distributed. Further balancing charging technology can refer to the prior art.

[0055] The electrical connection mode between the discharge output part 2, the voltage collection part 3 and the electrodes can be but is not limited to laser welding, tin soldering, ultrasonic welding and other prior art.

[0056] As an example of the embodiment, the battery monomers can be but are not limited to bundled together by a bundling belt.

[0057] As an example of the embodiment, the discharge output part 2 of the embodiment is a discharge wire, and a power connector 21 is connected at the end of the discharge wire, so as to be connected with another power connector 21 of an external electric device.

[0058] Similarly, the voltage collection part 3 is a voltage collection wire, and a terminal 31 is connected at the end of each voltage collection wire as a balancing charging connector, which is connected with a charger.

[0059] The shell of the embodiment is a rigid shell, and the battery pack 1 body is packaged in the shell. The side wall of the shell is provided with a buckle hole 41 matched with the buckle part on the matched connecting buckle 5. As an example of the embodiment, the battery pack 1 body in a cuboid shape is taken as an example, and the buckle hole 41 is provided on each side wall of the cuboid shell. The number of the buckle holes 41 on each side wall can be one or more.

[0060] The middle part of the connecting buckle 5 is a connecting column 53, the outer diameter of the connecting column 53 is smaller than the hole diameter of the buckle hole 41 on the shell, and the first buckle part 51 and the second buckle part 52 are respectively arranged at the two opposite ends of the connecting column 53. In the natural state, the outer diameter of the first buckle part 51 and the second buckle part 52 at the two ends is larger than the outer diameter of the connecting column 53 in the middle, and is slightly larger than the hole diameter of the buckle hole 41 on the shell.

[0061] The connecting buckle 5 of the embodiment is made of a material with good elasticity, and can be made by injection molding process.

[0062] The battery pack 1 of the embodiment can be used as a power source alone, and the buckle hole 41 serves as a heat dissipation hole to improve the heat dissipation effect of the battery pack 1 and avoid accumulation of heat in the shell.

[0063] The plurality of battery packs 1 of the embodiment can also be flexibly combined into a battery pack combination, and the battery pack combination is used as a power source to provide current to the outside. Specifically, the connecting buckle 5 is buckled on the buckle hole 41 of the side wall of the shell of each battery pack 1, and each connecting buckle 5 laterally combines two adjacent battery packs 1 together. Figures 3-11 As shown in the figure, the battery pack combination can be obtained by assembling and combining any number of battery packs in any direction according to the needs of user application, and the discharge output parts of the battery packs can be connected in series or parallel through a series-parallel circuit structure, so that the battery pack combination as a whole outputs current to the outside. Each battery pack can also be used as a power source to supply power to the outside. The specific application is based on the needs of the user.

[0064] As an example of the embodiment, the shell includes an insulating tube 4, a bottom cover 6, and a top cover 7. The insulating tube 4 can be but is not limited to an insulating square tube, both ends of the insulating tube 4 are open, and when assembled, the battery pack 1 body is sleeved into the insulating tube 4 from the top, the battery pack 1 body is sleeved in the insulating tube 4, the bottom cover 6 is installed at the bottom of the insulating tube 4, the battery pack 1 body is carried on the bottom cover 6, the top cover 7 is fixed at the top of the insulating tube 4, the discharge output part 2 and the voltage collection part 3 are installed on the top cover 7 of the insulating tube 4, and the wire hole part 71 is provided on the insulating tube 4 and the top cover 7 to expose or protrude from the top cover 7. As an example of the embodiment, the wire sheath 8 is also provided in the wire hole part 71. The shell structure of the embodiment is beneficial to facilitate the assembly and disassembly of the battery pack 1, saving time and effort.

[0065] As an example of the embodiment, the insulating tube 4 and the top cover 7 are connected by the matching recessed buckle hole 41 and the protruding third buckle part between the inner wall of the insulating tube 4 and the outer wall of the top cover 7, which further facilitates the disassembly and installation of the top cover 7 of the battery pack 1 and facilitates the user to maintain and overhaul the battery pack 1.

[0066] As an illustration of the embodiment, the inner wall of the side wall of the shell is further provided with a plurality of snap-in hidden holes recessed in the inner wall, each of the snap-in hidden holes corresponding to each of the snap-in holes 41, and communicating with each other in an inner-outer direction, i.e. the wall thickness of the part where the snap-in hidden hole is located is thinner than that of other parts. In this way, when the first snap-in part 51 (or the second snap-in part 52) of the connecting buckle 5 is snapped into the snap-in hole 41, the connecting buckle 5 extending into the shell is located in the snap-in hidden hole and does not protrude from the inner wall of the side wall of the shell, thus not occupying the space inside the shell for assembling the battery pack 1 body, which is conducive to improving the capacity of the battery pack 1.

[0067] A through hole 57 is provided on each connecting buckle 5 and extends through the first snap-in part 51, the second snap-in part 52 and the connecting column 53. This design is conducive to saving materials, and when the first snap-in part 51 (or the second snap-in part 52) is elastically deformed under the extrusion of the snap-in hole 41, the first snap-in part 51 (or the second snap-in part 52) deforms radially, which makes it easier to elastically compress and deform, and makes the snap-in assembly between the connecting buckle 5 and the battery pack 1 easier and saves time and effort.

[0068] As an illustration of the embodiment, the first snap-in part 51 of the connecting buckle 5 is taken as an example, and the second snap-in part 52 has the same structure as the first snap-in part 51. A plurality of notches 54 are further provided on the first snap-in part 51, each of the notches 54 divides the first snap-in part 51 into a plurality of snap-in fixing parts distributed around the through hole 57 and protruding from the outer periphery of the connecting column 53. The notches 54 between the snap-in fixing parts are narrowed when the snap-in part is snapped into the snap-in hole 41, and the snap-in fixing parts are compressed towards the center, which makes it easier for the snap-in part to enter the snap-in hole 41 and be limited in the snap-in hidden hole through the snap-in hole 41, and makes the snap-in assembly between the connecting buckle 5 and the battery pack 1 easier to operate and saves time and effort.

[0069] As an illustration of the embodiment, the snap-in fixing parts of each snap-in part are uniformly distributed around the through hole 57, which can but is not limited to be symmetrical with respect to the axis of the through hole 57.

[0070] As an illustration of the embodiment, a chamfered slope 56 is provided on the outer edge of the outer end surface of each snap-in part facing away from the connecting column 53, i.e. the outward end surface of each snap-in fixing part of the snap-in part, so that the distance from each point on each chamfered slope 56 to the axis of the through hole 57 gradually decreases in the direction away from the connecting column 53. When the snap-in part is snapped into the snap-in hole 41, the front end of each chamfered slope 56 closest to the axis enters the snap-in hole 41 first, which makes the snap-in part easier to enter the snap-in hole 41 and makes the snap-in assembly between the connecting buckle 5 and the battery pack 1 easier to operate and saves time and effort.

[0071] The above-described embodiments do not constitute a limitation on the protection scope of the technical solutions. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solutions.

Claims

1. A battery pack, characterized in that, include: The battery pack body is composed of a plurality of individual battery cells connected in series, parallel, or a combination of both. A discharge output section and a voltage acquisition section are extended from the top of the battery pack body. The battery pack body is encapsulated within the housing, and snap-fit ​​holes are provided on the side wall of the housing. The connecting buckle has two opposite ends, each with a snap-fit ​​portion. Each snap-fit ​​portion mates with a snap-fit ​​hole on the housing, allowing for engagement with the snap-fit ​​hole. When one of the latching parts of the connecting buckle is latched with one of the latching holes of the housing, the other latching part of the connecting buckle is located outside the side wall of the housing.

2. The battery pack according to claim 1, characterized in that, The housing includes an insulating tube, a bottom cover fixed to the bottom opening of the insulating tube, and a top cover fixed to the top opening of the insulating tube. The battery pack body is fitted inside the insulating tube and encapsulated between the bottom cover and the top cover. The discharge output unit 2 and the voltage acquisition unit extend out of the top cover.

3. The battery pack according to claim 1, characterized in that, The inner wall of the side wall of the housing is also provided with a buckle concealment hole recessed into the inner wall, and each buckle concealment hole is directly opposite and communicates with each buckle hole. When one of the latching parts of the connecting buckle is latched with one of the latching holes, the connecting buckle extending into the latching hole is located inside the latching hidden hole and does not protrude from the inner wall of the side wall of the housing.

4. The battery pack according to claim 1, characterized in that, The outer diameter of the connecting post located between the two latching parts of the connecting buckle is narrower than the diameter of each latching hole and narrower than the outer diameter of each latching part.

5. The battery pack according to claim 4, characterized in that, Each of the connecting buckles is provided with a through hole that passes through both of the buckle portions and the connecting post.

6. The battery pack according to claim 5, characterized in that, Each of the aforementioned latching parts includes a plurality of latching fixing portions that protrude from the outer periphery of the connecting post surrounding the through hole. There is a notch between any two adjacent buckle fixing parts in any circumferential direction. When one of the latching parts is latched with the latching hole, one end of the connecting post passes through the latching hole, and each of the latching fixing parts constituting the latching part passes through the latching hole and is limited to the latching hidden hole.

7. The battery pack according to claim 6, characterized in that, Each of the snap-fit ​​fixing parts has a chamfered bevel on the outer edge of the outer end face facing away from the connecting post. Along the direction away from the connecting post, the distance from each point on the chamfered bevel to the axis of the through hole gradually decreases.

8. The battery pack according to claim 6, characterized in that, On each of the aforementioned latching parts, the latching fixing parts are evenly distributed around the through hole.

9. The battery pack according to claim 8, characterized in that, At least one snap-fit ​​hole is provided on each of the side walls of the housing.

10. A battery pack assembly, characterized in that, include, The battery packs according to any one of claims 1 to 9 are each provided with a connecting buckle on at least one snap-fit ​​hole in the housing of each battery pack. Each of the connecting buckles has one latching part that latches into a latching hole on the housing of a battery pack, and another latching part that latches into a latching hole on the housing of another battery pack. The two battery packs connected by any of the connecting buckles are connected side to side by at least one of the connecting buckles.

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