Battery pack and electric device

Abstract

The present application provides a battery pack and an electric device. The battery pack comprises a battery case and a cell module; the battery case comprises an accommodating space; the cell module is disposed in the accommodating space; the cell module comprises a cell group and an adhesive fixing part; the adhesive fixing part is provided with a plurality of cell mounting holes; the cell group comprises a plurality of cells, and the cells are respectively disposed in different cell mounting holes.

Description

Battery pack and electric device

[0001] The present application claims priority to the Chinese patent application No. 202421568296.2, filed on July 03, 2024, to the Chinese Patent Office, the whole content of the above application being incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery, in particular to a battery pack and an electric device. BACKGROUND

[0003] Lithium batteries are more environmentally friendly than lead-acid batteries, have faster discharge speed and shorter charging time. Common types of lithium batteries include nickel-hydrogen batteries and lithium iron phosphate batteries. SUMMARY

[0004] However, in the related art, the starting power of the cylindrical battery pack corresponding to the lithium battery is mostly fixed by a support, which has the technical problems of excessive use of fixed parts and accessories, complex processing procedures, and high overall cost of the battery pack.

[0005] The present application provides a battery pack and an electric device, aiming to optimize the structure of the battery pack, reduce the complexity of the preparation process of the battery pack, and reduce the overall cost of the battery pack.

[0006] In a first aspect, the present application provides a battery pack, comprising:

[0007] a battery box having a containing space;

[0008] a cell module arranged in the containing space;

[0009] The cell module comprises a cell group and a colloid fixing portion, the colloid fixing portion is provided with a plurality of cell mounting holes, the cell group comprises a plurality of cells, and each cell is arranged in a different cell mounting hole.

[0010] In a possible implementation, the cell mounting hole is a through hole structure, and two ends of the cell are respectively located at two openings of the cell mounting hole.

[0011] In a possible implementation, the diameter length of the cell mounting hole is equal to the diameter length of the cell.

[0012] In a possible implementation, the colloid fixing portion is integrally formed.

[0013] In a possible implementation, the material of the colloid fixing portion is foaming glue.

[0014] In a possible implementation, the battery box comprises a box body and an upper cover arranged on the box body, the box body comprises a bottom plate and four side plates arranged around the bottom plate, and the bottom plate, the four side plates and the upper cover form the containing space.

[0015] In a possible implementation, the battery pack further comprises a first fixing portion arranged between the cell module and the bottom plate, and the first fixing portion is configured to fix the cell module to the bottom plate.

[0016] In a possible implementation, the bottom plate and / or the outer side of the four side plates are provided with reinforcing ribs.

[0017] In a possible implementation, at least one target side plate of the four side plates is provided with a pressure relief valve, and the first end side of the cell is provided with an explosion-proof valve, and the first end side is arranged on the side close to the target side plate.

[0018] In a possible implementation, the lower box body further comprises a plurality of mounting portions, each mounting portion comprising two symmetrically arranged reinforcing portions and a second fixing portion between the two reinforcing portions, the side ends of the two reinforcing portions are connected to the side plate, the bottom ends of the two reinforcing portions are connected to the first side end and the second side end of the second fixing portion respectively, the third side end of the second fixing portion is connected to the side plate, the third side end is between the first side end and the second side end, and the second fixing portion is provided with a mounting hole.

[0019] In a second aspect, the present application provides a power consumption device, which comprises the battery pack of the first aspect. Advantages

[0020] In the present application, the plurality of cells included in the cell group are fixed by the gel fixing portion, and each cell is arranged in the cell mounting hole in the gel fixing portion, and then the entire cell module is directly placed in the accommodating space in the battery box. Therefore, it is not necessary to match the end plate, the side plate and other fixing components, so that the structure of the battery pack is optimized, the complexity of the preparation process of the battery pack is reduced, and the overall cost of the battery pack is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] FIG. 1 is an exploded structural schematic diagram of a battery pack according to some implementations of the present application;

[0022] FIG. 2 is a three-dimensional structural schematic diagram of a cell module before welding connection of an aluminum bar according to some implementations of the present application;

[0023] FIG. 3 is a three-dimensional structural schematic diagram of a cell module after welding connection of an aluminum bar according to some implementations of the present application;

[0024] FIG. 4 is a three-dimensional structural schematic diagram of assembly of a cell module and a box according to some implementations of the present application;

[0025] FIG. 5 is a three-dimensional structural schematic diagram of a battery pack after assembly according to some implementations of the present application;

[0026] FIG. 6 is a top view structural schematic diagram of a battery box provided by some implementations of the present application.

[0027] Legend:

[0028] Battery pack 100, battery cell module 102, colloid fixing part 104, battery cell 106, box 107, upper cover 108, bottom plate 109, side plate 110, mounting hole 111, first fixing part 112, reinforcing rib 113, pressure relief valve 114, connecting aluminum bar 115, reinforcing part 117, second fixing part 118, mounting hole 119. Embodiments of the present application

[0029] Since the starting power supply of the cylindrical battery pack in the related art adopts the fixing mode of the support, this mode has the technical problems of too many fixed parts and auxiliary materials, complex processing procedures, and too high overall cost of the battery pack. Therefore, the embodiments of the present application provide a battery pack to fix a plurality of battery cells included in a battery cell group through a colloid fixing part, and then place each battery cell in a battery cell mounting hole in the colloid fixing part, and then directly place the entire battery cell module in a containing space in the battery box. In this way, no end plate, side plate, or other fixed parts are needed, thereby optimizing the structure of the battery pack, reducing the complexity of the preparation procedures of the battery pack, and reducing the overall cost of the battery pack. For specific solutions, please refer to the following specific description.

[0030] It should be noted that in the following, the terms "battery module", "battery", "battery element", "battery cell", and "battery pack" can be used interchangeably and can refer to any of a variety of different rechargeable battery chemistries and constructions, including but not limited to lithium ion (e.g., lithium ion phosphate, lithium cobalt oxide, lithium iron phosphate, other lithium metal oxide, etc.), lithium ion polymer, nickel metal hydride, nickel cadmium, nickel hydrogen, nickel zinc, silver zinc, or other battery types / constructions. The term "electric vehicle" is used herein to refer to a battery electric vehicle, also known as an EV, a plug-in hybrid electric vehicle, also known as a PHEV, or a hybrid electric vehicle (HEV) that employs multiple sources of propulsion, one of which is an electric drive system. It should be understood that the use of the same reference numerals in different drawings identifies the same component or equivalent functional components across the different drawings, and that various modifications to the preferred embodiments, general principles, and features described herein will be readily apparent to those skilled in the art. Moreover, the drawings are not intended to be to scale, and should not be considered to limit the scope of the application.

[0031] Embodiments of the present application can generally apply to systems employing electric motors, and more particularly, but not exclusively, to electric vehicles using a multi-phase electric motor (e.g., an inductive electric motor). Electric vehicles use one or more stored energy sources, such as a battery pack, to provide electrical energy to the vehicle. This energy is used, at least in part, to propel the vehicle. The stored energy can also be used to provide energy required by other vehicle systems, such as vehicle lighting, zonable heating, ventilation, and air conditioning (HVAC) systems, auxiliary control systems (e.g., sensors, displays, navigation systems, etc.), vehicle entertainment systems (e.g., radios, DVDs, MP3s, etc.), etc. Conventional electric vehicles include passenger vehicles and vehicles designed to transport goods, examples of which include passenger cars, trucks, electric bicycles, and recreational watercraft. Electric vehicles also include specialized work vehicles and carts, some of which can incorporate equipment such as forklifts, scissor lifts, lift and / or boom aerial work platforms, street cleaning systems, conveyors, and pallet jacks.

[0032] Specifically, please refer to FIG. 1, which is an exploded structural schematic diagram of a battery pack provided by some implementations of the present application. The battery pack 100 specifically includes a battery box (including an upper cover 108 and a box body 107) having a receiving space, and a cell module 102 disposed in the receiving space. The cell module 102 includes a cell group (including a plurality of cells 106) and a glue fixing part 104 provided with a plurality of cell mounting holes (not shown in the figure). The cell group includes a plurality of cells 106, and each cell 106 is disposed in a different cell mounting hole.

[0033] It should be noted that the glue fixing part 104 is formed after gluing and curing.

[0034] The cell 106 can be a cylindrical cell, and in other embodiments, can also be a cell of other shape types, such as a cuboid cell, and is not specifically limited.

[0035] The structure of the cylindrical cell 106 can mainly include: a shell, usually made of metal material such as nickel-plated steel plate, which serves to protect and support the cell 106. A cap, corresponding to the shell, is usually located at the positive end of the cell 106, and serves to seal and protect. Positive electrode: the energy storage component of the cell 106, usually made of metal foil or other conductive materials. Negative electrode: opposite to the positive electrode, also made of metal foil or other conductive materials. Separator: located between the positive and negative electrodes, preventing direct contact between the two while allowing ion transfer. Electrolyte: filled inside the cell 106, helping ions transfer between the positive and negative electrodes to achieve the charging and discharging process. Film: may refer to the separator or a film material used for isolation and protection. PTC element (Positive Temperature Coefficient Thermistor): a protection device that automatically cuts off the circuit when the temperature of the cell 106 is too high, preventing overheating. Gasket: used to secure and seal the various components inside the cell 106. Safety valve: used to release gas when internal pressure is too high, preventing the cell 106 from exploding. It should be noted that these structures together ensure the normal operation and safety of the cylindrical cell 106.

[0036] The battery pack 100 can be applied to a starting power source, where the starting power source is a device used to provide emergency or temporary power support, usually used to start a car, boat or other device that requires high current starting. It can assist in starting the vehicle when the battery is running out of power or power is insufficient. It should be noted that when the battery pack 100 is applied to the starting power source, the output parameters of the battery pack 100 can be set according to actual needs, and accordingly, the number of cells 106 can also be set according to actual needs, for example, the number of cells 106 included in the battery pack 100 can be one, four, six, eight or more, or other numbers, which are not limited in particular.

[0037] In addition, the battery pack 100 can also be applied to a power battery, where the power battery is a power source that provides power to tools. Specifically, the power battery is mainly used to provide power for energy-consuming devices such as electric vehicles, electric bicycles, logistics vehicles, electric boats, etc. This battery can convert chemical energy into electrical energy and achieve this process through internal oxidation and reduction reactions. Similarly, the output parameters of the battery pack 100 can be set according to actual needs, and accordingly, the number of cells 106 can also be set according to actual needs, for example, the number of cells 106 included in the battery pack 100 can be one, two, three, four or more, or other numbers, which are not limited in particular.

[0038] The plurality of battery cells 106 included in the battery cell group are fixed by the colloid fixing portion 104, each battery cell 106 is arranged in the battery cell mounting hole in the colloid fixing portion 104, and then the whole battery cell module 102 is directly placed in the accommodating space in the battery box. In this way, the end plate side plate 110 and other fixing components are not needed, the structure of the battery pack 100 is optimized, the complexity of the preparation process of the battery pack 100 is reduced, and the overall cost of the battery pack 100 is reduced.

[0039] In some embodiments of the present application, the material of the colloid fixing portion 104 is foamed glue, and the colloid fixing portion 104 can be integrally formed.

[0040] The foamed glue is a kind of adhesive with foaming and bonding properties, which can be used for filling, sealing, bonding and insulation in the embodiments of the present application. Specifically, the foamed glue can include at least one of polyurethane foamed glue, two-component packaged foamed glue, polyethylene foamed glue, and organic silicon foamed material.

[0041] As shown in FIGS. 2-5, in one specific embodiment of the present application, the preparation process of the battery cell module 102 is as follows:

[0042] First, the battery cells 106 to be welded are fixed in the tooling, foamed glue is poured into the tooling, the tooling upper cover 108 is covered, after the internal foamed glue automatically fills the gap, the foamed glue is solidified to fix the battery cells 106, and then the battery cell module 102 can be taken out; and then the battery cell module 102 is welded with the aluminum bar 115.

[0043] In the present application, the foamed glue is directly poured into the gaps between the plurality of battery cells 106 and between the plurality of battery cells 106 and the tooling by combining the preset tooling, so that the colloid fixing portion 104 is integrally formed. The overall shape and size of the colloid fixing portion 104 can be set according to actual needs. Specifically, the shape and volume of the accommodating space in the tooling can be set according to actual needs. Generally, the shape and size of the colloid fixing portion 104 are adapted to the accommodating space in the battery box. For example, the shape of the colloid fixing portion 104 is a cuboid foam brick.

[0044] Since the colloid fixing portion 104 in the battery cell module 102 is made of foamed glue and is directly prepared by placing the battery cells 106 in the tooling to fill the foamed glue, the shape and size of the battery cell mounting hole in the colloid fixing portion 104 for accommodating the battery cells 106 are adapted to the shape and size of the battery cells 106. Specifically, the diameter of the battery cell mounting hole is equal to the diameter of the battery cell 106.

[0045] It should be noted that the number of the cell mounting holes is matched with the number of the cells 106, and the two are in one-to-one correspondence, that is, when the number of the cells 106 is four, the number of the cell mounting holes is also four.

[0046] In this way, compared with the prior art in which structural glue or other structures for stabilizing the cells 106 are pre-set in the cell mounting holes, the present application adopts the foam glue integrated molding to obtain the glue fixing part 104, so that the spacing between the cells 106 and the glue fixing part 104 is appropriate, and the stability is good, and therefore, it is not necessary to additionally configure these structures for stabilizing the cells 106.

[0047] In some embodiments, the cell mounting hole is a through-hole structure, and the two ends of the cell 106 are located at the two openings of the cell mounting hole respectively, so that the welding and circuit connection between the cells 106 can be facilitated.

[0048] The cells 106 can be placed in a horizontal manner, that is, the cells 106 are placed in a horizontal manner. However, other placement manners are not excluded, and the actual requirements can be set.

[0049] In some embodiments of the present application, the battery box includes a box body 107 and an upper cover 108 arranged on the box body 107, the box body 107 includes a bottom plate 109 and four side plates 110 arranged around the bottom plate 109, and the bottom plate 109, the four side plates 110 and the upper cover 108 constitute a containing space.

[0050] The top outer side of the upper cover 108 can be provided with a mounting hole 111, and the specific position of the mounting hole 111 can be set according to actual requirements.

[0051] In some embodiments, as shown in FIG. 6, the battery pack 100 further includes a first fixing part 112 arranged between the cell module 102 and the bottom plate 109, and the first fixing part 112 is used to fix the cell module 102 to the bottom plate 109.

[0052] Specifically, the first fixing part 112 can be at least one layer of structural glue, and the at least one layer can be one layer, two layers or more layers, and the specific number of layers can be set according to actual requirements, and the thickness of each layer can also be set according to actual requirements, wherein the coating area of the structural glue is not less than the area of the contact between the glue fixing part 104 in the cell module 102 and the bottom plate 109 of the box body 107. In this way, by arranging at least one layer of structural glue between the cell module 102 and the bottom plate 109, the stability between the cell module 102 and the battery box can be effectively improved, the coating of the structural glue is easy to operate and low in cost, and the preparation difficulty and cost of the battery pack 100 can be effectively reduced.

[0053] Optionally, the first fixing part 112 can also be a clamping structure, so that the telecommunication module can be placed in the clamping structure and clamped by the clamping structure.

[0054] In some embodiments, the outer side of the bottom plate 109 can be provided with a reinforcing rib 113; or the outer side of the four side plates 110 is provided with a reinforcing rib 113; or the outer side of the bottom plate 109 and the outer side of the four side plates 110 are provided with a reinforcing rib 113, which can effectively enhance the overall structural stability of the battery box, ensure that the internal cell module 102 is not easily damaged, and improve the safety of the battery pack 100.

[0055] Specifically, the reinforcing rib 113 can be only a transverse reinforcing rib 113; or only a longitudinal reinforcing rib 113; or a transverse reinforcing rib 113 and a longitudinal reinforcing rib 113 arranged in cross.

[0056] In some embodiments, at least one target side plate 110 of the four side plates 110 is provided with a pressure relief valve 114, and the first end side of the cell 106 is provided with an explosion-proof valve (not shown in the figure), and the first end side is arranged on the side close to the target side plate 110. Among them, at least one can be one, two, three or four.

[0057] In some embodiments, the lower box body 107 further comprises a plurality of mounting parts 116, which can be three, four, five or more. It should be noted that the plurality of mounting parts should have a certain stability to the lower box body 107, so the number thereof is at least three, and the setting of the number and the position thereof should also be set according to the optimal stability, for example, when the number thereof is three, the position thereof should be arranged in a triangular shape, the mounting part comprises two symmetrical reinforcing parts 117 and a second fixing part 118 located between the two reinforcing parts 117, the side ends of the two reinforcing parts 117 are connected with the side plate 110, the bottom ends of the two reinforcing parts 117 are connected with the first side end and the second side end of the second fixing part 118 respectively, the third side end of the second fixing part 118 is connected to the side plate 110, the third side end is located between the first side end and the second side end, and the second fixing part 118 is provided with a mounting hole 119.

[0058] In a specific embodiment, the plurality of mounting parts is four, and the four mounting parts are arranged at the four top corners of the box body 107 respectively.

[0059] The mounting part is used for mounting and fixing the battery pack 100 to the electrical equipment, and the fixing mode can be to adopt a bolt, that is, to use the adaptation of the bolt and the mounting hole 119 to mount and fix the battery pack 100 to the electrical equipment.

[0060] In order to better implement the battery pack 100 in the embodiments of the present application, on the basis of the battery pack 100, the present application further provides a power consumption equipment, specifically, the power consumption equipment specifically includes the battery pack 100.

[0061] In some embodiments, when the battery pack 100 is applied to a starting power supply, the power consumption equipment can include but is not limited to a car, a ship or other equipment that needs high current starting.

[0062] In some embodiments, when the battery is applied to a power battery, the power consumption equipment can include but is not limited to an electric vehicle, an electric bicycle, a logistics vehicle, an electric ship and other energy-consuming equipment.

[0063] In the embodiments of the present application, the plurality of battery cells 106 included in the battery cell group are fixed by the colloid fixing portion 104, and each battery cell 106 is arranged in the battery cell mounting hole in the colloid fixing portion 104, and then the entire battery cell module 102 is directly placed in the accommodating space in the battery box. In this way, it is not necessary to match fixing components such as end plates and side plates 110, thereby optimizing the structure of the battery pack 100, reducing the complexity of the preparation process of the battery pack 100, reducing the overall cost of the battery pack 100, and reducing the overall cost of the power consumption equipment.

Claims

1. A battery pack, comprising: a battery box having a receiving space; a battery cell module arranged in the receiving space; the battery cell module comprises a battery cell group and a glue fixing part, the glue fixing part is provided with a plurality of battery cell mounting holes, the battery cell group comprises a plurality of battery cells, and each of the battery cells is arranged in a different battery cell mounting hole.

2. The battery pack of claim 1, wherein, The battery cell mounting hole is a through hole structure, and two ends of the battery cell are respectively located at two openings of the battery cell mounting hole.

3. The battery pack of claim 1, wherein, The diameter length of the battery cell mounting hole is equal to the diameter length of the battery cell.

4. The battery pack of claim 1, wherein, The glue fixing part is integrally formed.

5. The battery pack of claim 1, wherein, The material of the glue fixing part is foaming glue.

6. The battery pack of any one of claims 1-5, wherein, The battery box comprises a box body and an upper cover arranged on the box body, the box body comprises a bottom plate and four side plates arranged around the bottom plate, and the bottom plate, the four side plates and the upper cover form the receiving space.

7. The battery pack of claim 6, wherein, The battery pack further comprises a first fixing part arranged between the battery cell module and the bottom plate, and the first fixing part is arranged to fix the battery cell module to the bottom plate.

8. The battery pack of claim 6, wherein, The outer side of the bottom plate and / or the four side plates is provided with a reinforcing rib.

9. The battery pack of claim 6, wherein, At least one target side plate of the four side plates is provided with a pressure relief valve, a first end side of the battery cell is provided with an explosion-proof valve, and the first end side is arranged on a side close to the target side plate.

10. The battery pack of claim 6, wherein, The lower box further comprises a plurality of mounting parts, the mounting part comprises two symmetrically arranged reinforcing parts and a second fixing part located between the two reinforcing parts, the side ends of the two reinforcing parts are connected with the side plates, the bottom ends of the two reinforcing parts are respectively connected with a first side end and a second side end of the second fixing part, a third side end of the second fixing part is connected to the side plate, the third side end is located between the first side end and the second side end, and the second fixing part is provided with a mounting hole.

11. An electrical device, comprising: The electric device comprises the battery pack according to any one of claims 1-10.

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