Battery pack and vehicle

Abstract

The utility model provides a battery pack and a vehicle, and relates to the technical field of batteries, and the battery pack comprises a battery core assembly, a bracket assembly, a heat-shrinkable sleeve and a sealing element, the battery cell assembly is clamped between the support assemblies, and the support assemblies are used for fixing the battery cell assembly. The support assembly is sleeved with the heat-shrinkable sleeve, the end of the heat-shrinkable sleeve is provided with a covered edge, and the edge of the end of the support assembly wraps the covered edge. The sealing piece is clamped between the covered edge and the support assembly. The heat-shrinkable sleeve of the battery pack can play a role in sealing outside the bracket assembly, and further plays a role in sealing other parts except the two ends of the battery pack. And the covered edge has a sealing effect on the edge of the end part of the battery. In addition, the sealing piece can play a role in tightening the end part of the heat-shrinkable sleeve, so that the width of a gap generated at the edge covering part can be reduced, and the sealing performance of the battery pack can be further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, concretely relates to a battery pack and vehicle. BACKGROUND

[0002] The battery pack is a commonly used power storage device for vehicles to provide stable power output.

[0003] In the prior art, the heat shrink sleeve is sleeved on the outer surface of the support assembly, the heat shrink sleeve is provided with a wrapping edge at the end of the support assembly, and the edge of the support assembly is wrapped in the wrapping edge.

[0004] However, since the heat shrink sleeve has poor elasticity, a gap is formed between the wrapping edge and the support assembly, which causes the battery pack to be unable to be completely sealed, thereby existing the safety hazard of water ingress and reducing the waterproof performance of the battery pack, and thus the safety of the battery pack is low. UTILITY MODEL CONTENTS

[0005] The utility model embodiment aims to provide a battery pack and vehicle, which can solve the problem of the battery pack being unable to be completely sealed and existing the safety hazard of water ingress in the related art, improve the waterproof performance of the battery pack, and thus improve the safety of the battery pack.

[0006] To solve the above technical problem, the utility model is implemented as follows:

[0007] In a first aspect, the utility model embodiment provides a battery pack, which comprises a battery cell assembly, a support assembly, a heat shrink sleeve and a sealing piece. The battery cell assembly is clamped between the support assemblies, and the support assembly is used for fixing the battery cell assembly. The heat shrink sleeve is sleeved on the support assembly, the heat shrink sleeve is provided with a wrapping edge at the end, and the edge of the end of the support assembly is wrapped in the wrapping edge. The sealing piece is clamped between the wrapping edge and the support assembly.

[0008] Optionally, the wrapping edge is a ring-shaped wrapping edge.

[0009] Optionally, the sealing piece is a sealing ring, and the support assembly, the sealing ring and the ring-shaped wrapping edge enclose to form a ring-shaped groove.

[0010] Optionally, the groove is filled with sealing glue.

[0011] Optionally, the sealing ring is a foam ring.

[0012] Optionally, a rubber ring is further arranged between the ring-shaped wrapping edge and the support assembly, and the rubber ring has the same extension direction as the sealing ring.

[0013] Optionally, along the plane where the sealing ring is located, the rubber ring is located inside the sealing ring.

[0014] Optionally, a glue layer is arranged between the heat-shrinkable sleeve and the support assembly, and the glue layer fixedly connects the heat-shrinkable sleeve and the support assembly.

[0015] Optionally, the support assembly comprises a first support and a second support, the battery cell assembly is clamped between the first support and the second support, and the glue layer comprises a first glue layer and a second glue layer.

[0016] The first glue layer is used for connecting the first support and the inner surface of the heat-shrinkable sleeve, and the second glue layer is used for connecting the second support and the inner surface of the heat-shrinkable sleeve.

[0017] In a second aspect, the utility model embodiment further provides a vehicle, the vehicle includes the battery pack of any one of the above first aspect.

[0018] In the embodiment of the application, the battery pack comprises a battery cell assembly and a support assembly, and the battery cell assembly is clamped between the support assembly, and the support assembly is used for fixing the battery cell assembly. In this way, the basic structure of the battery pack is formed, the battery cell assembly is used for storing electric energy, and the support assembly plays a role in protecting the battery cell assembly.

[0019] Then, the battery pack further comprises a heat-shrinkable sleeve, the heat-shrinkable sleeve is sleeved on the support assembly, the heat-shrinkable sleeve is provided with a wrapping edge at an end, and the edge of the end of the support assembly is wrapped in the wrapping edge. In this way, the heat-shrinkable sleeve can play a sealing role outside the support assembly, and further play a sealing role on other parts of the battery pack except the two ends. The wrapping edge plays a sealing role on the edge of the end of the battery.

[0020] Then, the battery pack further comprises a sealing piece, and the sealing piece is clamped between the wrapping edge and the support assembly. Compared with the design scheme of the end of the battery pack in the related art, the sealing piece blocks the path of water entering the inside of the heat-shrinkable sleeve from the outside, and further enhances the waterproof effect of the heat-shrinkable sleeve, so as to improve the waterproof performance of the battery pack. In addition, by arranging the sealing piece between the wrapping edge and the support assembly, the end of the heat-shrinkable sleeve can be tightened, and further the width of the gap generated at the wrapping edge can be reduced, so as to further improve the sealing performance of the battery pack.

[0021] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, the specific implementation manner can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the utility model more obvious and easy to understand, the following specific implementation manner of the utility model is described. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0023] Figure 1 is a structural schematic view of a battery pack formed after the end part is cut according to an embodiment of the present application;

[0024] Figure 2 is Figure 1 is a partial enlarged view of D in the middle part;

[0025] Figure 3 is Figure 1 is an exploded view of the battery pack in the middle part;

[0026] Figure 4 is Figure 1 is a structural schematic view of the battery pack in the middle part when placed on a horizontal plane;

[0027] Figure 5 is Figure 4 is a corresponding structural schematic view of the battery pack in the middle part when placed on a horizontal plane from another direction.

[0028] Explanation of reference signs:

[0029] 1 - cell assembly, 11 - cell, 2 - support assembly, 21 - first support, 22 - second support, 3 - heat shrink sleeve, 31 - edge covering, 4 - sealing member, 5 - groove, 6 - rubber ring, 7 - insulation layer, 8 - busbar assembly, 81 - first busbar, 82 - second busbar, 83 - bolt, 9 - power transmission line, 101 - terminal, 102 - BMS board, 100 - battery pack. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second" and the like are generally of one kind, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0032] The battery pack and the vehicle provided by the embodiments of the present application are described in detail below with reference to specific examples and application scenarios.

[0033] Figure 1 is a structural schematic view of the battery pack 100 after being cut at the end part, Figure 2 is Figure 1 is a local enlarged view of D in Figure 3 is Figure 1 is an exploded view of the battery pack 100 in Figure 4 is Figure 1 is a structural schematic view of the battery pack 100 when placed on a horizontal plane.

[0034] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the battery pack 100 comprises a cell assembly 1, a support assembly 2, a heat shrink sleeve 3 and a sealing member 4. The cell assembly 1 is clamped between the support assemblies 2, and the support assembly 2 is used for fixing the cell assembly 1. The heat shrink sleeve 3 is sleeved on the support assembly 2, and the heat shrink sleeve 3 is provided with a wrapping edge 31 at the end part, and the edge of the end part of the support assembly 2 is wrapped in the wrapping edge 31. The sealing member 4 is clamped between the wrapping edge 31 and the support assembly 2.

[0035] In the embodiments of the present application, the battery pack 100 comprises the cell assembly 1 and the support assembly 2, and the cell assembly 1 is clamped between the support assemblies 2, and the support assembly 2 is used for fixing the cell assembly 1. In this way, the basic structure of the battery pack 100 is constituted, the cell assembly 1 is used for storing electric energy, and the support assembly 2 plays a role in protecting the cell assembly 1.

[0036] Then, since the battery pack 100 further comprises the heat shrink sleeve 3, the heat shrink sleeve 3 is sleeved on the support assembly 2, and the heat shrink sleeve 3 is provided with the wrapping edge 31 at the end part, and the edge of the end part of the support assembly 2 is wrapped in the wrapping edge 31. In this way, the heat shrink sleeve 3 can play a sealing role outside the support assembly 2, and further play a sealing role on other parts of the battery pack 100 except the two ends. The wrapping edge 31 plays a sealing role on the edge of the end part of the battery.

[0037] Then, since the battery pack 100 further comprises the sealing member 4, the sealing member 4 is clamped between the wrapping edge 31 and the support assembly 2. Compared with the design scheme of the end part of the battery pack 100 in the related art, the sealing member 4 blocks the path for water to enter the inside of the heat shrink sleeve 3 from the outside, and further enhances the waterproof effect of the heat shrink sleeve 3, so as to improve the waterproof performance of the battery pack 100. In addition, by arranging the sealing member 4 between the wrapping edge 31 and the support assembly 2, the end part of the heat shrink sleeve 3 can be tightened, and thus the width of the gap generated at the wrapping edge 31 can be reduced, so as to further improve the sealing performance of the battery pack 100.

[0038] It should be noted that the above-mentioned battery cell assembly 1 includes a plurality of cylindrical battery cells 11, and the side walls of the plurality of cylindrical battery cells 11 are arranged in abutment in sequence to form the battery cell assembly 1.

[0039] It should also be noted that the heat-shrinkable sleeve 3 has the characteristic of high-temperature shrinkage, which will shrink rapidly after being heated and tightly wrap on the support assembly 2, thereby being able to play a waterproof effect. In addition, the heat-shrinkable sleeve 3 is a specially designed heat-shrinkable packaging material with the characteristics of high-temperature shrinkage, soft flame retardation, insulation and corrosion prevention. The heat-shrinkable sleeve 3 is soft and elastic, can tightly fit the wrapped object, and provides good insulation and protection effect. It can provide insulation protection for wires, cables and wire terminals to prevent current leakage and short circuit. It can also provide sealing, moisture-proof, waterproof and corrosion-proof protection at the connection of cables and components. When using the heat-shrinkable sleeve 3, the following steps should be followed. First, select the appropriate heat-shrinkable sleeve 3 according to the diameter of the protected object and the required performance; then remove burrs, corners and dirt on the surface of the protected object to ensure that the surface is dry and clean; then wrap the heat-shrinkable sleeve 3 on the protected object to ensure that the sleeve covers completely and is accurately positioned; then use a heat gun, oven, hair dryer or other heating tools to heat the heat-shrinkable sleeve 3, so that it shrinks and tightly fits on the protected object. Pay attention to control the heating temperature and time to avoid overheating and damage to the sleeve. Finally, after the heat-shrinkable sleeve 3 is completely shrunk, check whether it is uniformly and tightly wrapped on the protected object without bubbles, wrinkles or exposed parts. If necessary, reheat and solidify the treatment.

[0040] When using the heat-shrinkable sleeve 3, safety operation should be paid attention to avoid accidents such as burns and fires. Heat-shrinkable sleeves 3 of different materials and specifications have different performance and application range, which should be selected and used according to specific needs. During the heating and shrinking process, the heating temperature and time should be controlled to avoid overheating and damage to the sleeve or performance degradation. Regularly check and maintain the protected object and the heat-shrinkable sleeve 3 on it to ensure that it is in good protection state.

[0041] Optionally, in some embodiments, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the edge wrapping 31 is a ring-shaped edge wrapping. In this way, the edge wrapping 31 is arranged along the circumference of the heat-shrinkable sleeve 3, so that the gap between the heat-shrinkable sleeve 3 and the support assembly 2 along the circumference of the heat-shrinkable sleeve 3 can be sealed by the edge wrapping 31, thereby further preventing water from entering the inside of the heat-shrinkable sleeve 3, and thus further improving the sealing performance of the battery pack 100.

[0042] It should be noted that the annular rim can be a circular ring or a polygonal ring, or can be a ring of other shapes, and the specific shape depends on the cross-sectional shape of the support assembly 2, and the embodiments of the present application do not limit the shape.

[0043] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the sealing member 4 is a sealing ring, and the support assembly 2, the sealing ring and the annular rim enclose an annular groove 5.

[0044] When the rim 31 is annular, the sealing ring as the sealing member 4 can match the shape of the rim 31, so that the sealing ring further blocks the path of water from the outside to the inside of the heat-shrinkable sleeve 3 along the extension direction of the rim 31, thereby further enhancing the waterproof effect of the heat-shrinkable sleeve 3, and thus further improving the waterproof performance of the battery pack 100.

[0045] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the groove 5 is filled with a sealant.

[0046] The sealant is arranged along the extension direction of the rim 31, and the sealant is saturatedly filled in the groove 5. In this way, the sealant further blocks the path of water from the outside to the inside of the heat-shrinkable sleeve 3 along the extension direction of the rim 31, thereby enhancing the waterproof effect of the heat-shrinkable sleeve 3, and thus further improving the waterproof performance of the battery pack 100.

[0047] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the sealing ring is a foam ring.

[0048] Since the foam has elasticity, its volume can be contracted, so that the foam ring will be deformed when it is clamped between the end of the support assembly 2 and the rim 31 and subjected to pressure. In this way, the foam ring has a tendency to expand, thereby applying a supporting force to the rim 31, thereby enhancing the tightness of the heat-shrinkable sleeve 3, thereby further reducing the width of the gap generated at the rim 31, and thus further improving the sealing performance of the battery pack 100.

[0049] It should be noted that the above-mentioned foam ring is a ring-shaped body made of foam, wherein the foam is a porous, lightweight and elastic material, which is usually made of polymer through a foaming process. In the foaming process, the polymer material is injected with a gas or liquid foaming agent, and then a chemical reaction or physical change is carried out under appropriate temperature and pressure. The polymer can be polyurethane, polyethylene or polystyrene, or other polymer materials, which are not limited in the embodiments of the present application.

[0050] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a rubber ring 6 is further arranged between the annular edge and the support, and the extending direction of the rubber ring 6 is the same as that of the sealing ring. The rubber ring 6 is formed by injecting liquid glue into the above-mentioned groove 5 and solidifying, so as to fill the gap between the annular edge and the support assembly 2, further prevent water from entering the inside of the heat-shrinkable sleeve 3, and further improve the waterproof performance of the battery pack 100.

[0051] In addition, since the rubber ring 6 is elastic, when it is clamped between the annular edge and the support assembly 2, the rubber ring 6 can be compressed and deformed, so that the rubber ring 6 has a swelling tendency, thereby applying a supporting force to the edge 31, further enhancing the tightness of the heat-shrinkable sleeve 3, and further improving the waterproof performance of the battery pack 100.

[0052] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , along the plane where the sealing ring is located, the rubber ring 6 is located inside the sealing ring.

[0053] In this way, for both the sealing ring and the rubber ring 6, when the battery pack 100 contacts water, the rubber ring 6 directly contacts water and plays a role as the first waterproof, and the sealing ring plays a role as the second waterproof. That is, the rubber ring 6 and the sealing ring together constitute two waterproof barriers, thereby further improving the waterproof performance of the battery pack 100.

[0054] It should be noted that the rubber ring 6 is a polyurethane ring. Since polyurethane is a high molecular material formed by polyol and polyisocyanate through condensation reaction, it has good mechanical properties. Specifically, polyurethane has high density, high strength, high toughness, high wear resistance and other characteristics. In addition, the chemical properties of polyurethane are relatively stable, and it is resistant to oil, wear, low temperature, aging, has high hardness and good elasticity. In this way, the rubber ring 6 also has the above-mentioned properties, so as to prolong the service life of the rubber ring 6, and further prolong the service life of the battery pack 100.

[0055] Optionally, in some embodiments, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a glue layer is arranged between the heat shrink sleeve 3 and the bracket assembly 2, and the glue layer fixedly connects the heat shrink sleeve 3 and the bracket assembly 2.

[0056] In the prior art, the bracket assembly 2 and the heat shrink sleeve 3 of the battery pack 100 are bonded by waterproof foam. However, when the bracket assembly 2 and the heat shrink sleeve 3 are bonded by the waterproof foam, the bonding effect depends on the adhesive effect of the waterproof foam. However, as the use time is prolonged, the waterproof foam will age, which will cause the adhesive effect of the adhesive to decrease, and thus the bonding effect of the waterproof foam will be greatly degraded, which will reduce the waterproof performance of the battery pack 100.

[0057] To solve the above problem, the waterproof foam is replaced by a glue layer, that is, the glue layer is directly used to fixedly connect the heat shrink sleeve 3 and the bracket assembly 2. The glue layer is formed by injecting liquid glue between the bracket assembly 2 and the heat shrink sleeve 3 and then curing. Compared with the waterproof foam in the related art, the glue layer has better bonding performance, which improves the safety and stability of the battery pack 100. Then, since the waterproof performance of the glue layer is good, the waterproof performance of the battery pack 100 can be improved. Then, since the durability of the glue layer is good, the service life of the battery pack 100 can be improved.

[0058] In addition, in the related art, when the waterproof foam is used, it is necessary to ensure the flatness when the waterproof foam is pasted, and this process is difficult to control. When the glue layer is used, the glue can be directly applied between the heat shrink sleeve 3 and the bracket assembly 2, which is more simple and convenient to operate, and thus the bonding efficiency is improved, and thus the production efficiency of the battery pack 100 can be improved.

[0059] It should be noted that the glue layer is a polyurethane layer. Since polyurethane is a high molecular material formed by polyol and polyisocyanate through condensation reaction, it has good mechanical properties. Specifically, polyurethane has high density, high strength, high toughness, high wear resistance and other characteristics. In addition, polyurethane has stable chemical properties, is resistant to oil, wear, low temperature, aging, has high hardness and good elasticity. In this way, the glue layer also has the above properties, so the service life of the glue layer can be prolonged, and thus the service life of the battery pack 100 can be prolonged.

[0060] In addition, compared with the waterproof foam in the related art, the bonding performance of polyurethane is better, so the heat shrink sleeve 3 and the bracket assembly 2 can be bonded more firmly, which can improve the safety and stability of the battery pack 100, and thus the service life of the battery pack 100 can be improved.

[0061] Optionally, in some embodiments, referring to Figure 1 ,Figure 2 , Figure 3 and Figure 4 The bracket assembly 2 includes a first bracket 21 and a second bracket 22. The battery cell assembly 1 is sandwiched between the first bracket 21 and the second bracket 22. The adhesive layer includes a first adhesive layer and a second adhesive layer. The first adhesive layer is used to connect the first bracket 21 and the inner surface of the heat shrink tubing 3, and the second adhesive layer is used to connect the second bracket 22 and the inner surface of the heat shrink tubing 3.

[0062] Since the bracket assembly 2 includes a first bracket 21 and a second bracket 22, and the cell assembly 1 is sandwiched between the first bracket 21 and the second bracket 22, a protective layer can be formed on the two opposite surfaces of the cell assembly 1, thereby better protecting the cell assembly 1 and improving the impact resistance of the battery pack 100. Furthermore, when installing the cell assembly 1 and the bracket assembly 2, one end of the cell assembly 1 can be connected to one of the first bracket 21 and the second bracket first, and then the other end of the cell assembly 1 can be connected to the other of the first bracket 21 and the second bracket, making assembly easier. When the first bracket 21 and the second bracket 22 are respectively connected to the two ends of the cell assembly 1, adhesive can be applied to the gap between the first bracket 21 and the second bracket 22, further improving the sealing performance of the battery pack 100.

[0063] Next, the adhesive layer includes a first adhesive layer and a second adhesive layer; the first adhesive layer is used to connect the inner surface of the first bracket 21 and the heat shrink tubing 3, and the second adhesive layer is used to connect the inner surface of the second bracket 22 and the heat shrink tubing 3. In this way, the first and second adhesive layers can perfectly match the first bracket 21 and the second bracket 22, allowing the heat shrink tubing 3 to be adhered from both ends of the cell 11 bracket. Therefore, the heat shrink tubing 3 and the bracket assembly 2 can be bonded more firmly, which improves the safety and stability of the battery pack 100, and thus extends the service life of the battery pack 100.

[0064] See Figure 1 , Figure 2 and Figure 3 Figure 4 Figure 1 Figure 2 Figure 3 Figure 4 Figure 3 Figure 4 Figure 5 The battery pack 100 also includes an insulating layer 7, which wraps around the surface of the support assembly 2 and is located between the heat shrink tubing 3 and the support assembly 2 to provide insulation. The insulating layer 7 can be barley paper, plastic paper, or other insulating layers 7, and this application embodiment does not limit this.

[0065] The battery pack 100 further comprises a busbar assembly 8, which comprises a plurality of first busbars 81 and a plurality of second busbars 82, wherein the number of the first busbars 81 is the same as the number of the second busbars 82. The plurality of first busbars 81 are sequentially attached to the side of the first support 21 away from the cell assembly 1 and connected to the positive poles of the cells 11 in the cell assembly 1. The plurality of second busbars 82 are sequentially attached to the side of the second support 22 away from the cell assembly 1 and connected to the negative poles of the cells 11 in the cell assembly 1. The first busbars 81 and the first support 21 and the second busbars 82 and the second support 22 are connected by bolts 83.

[0066] The battery pack 100 further comprises a printed circuit board and a power transmission wire 9, wherein the printed circuit board is located inside the support assembly 2. The printed circuit board is provided with a power transmission circuit, one end of the power transmission wire 9 is connected to the power transmission circuit, and the other end of the power transmission wire 9 is provided with a terminal 101 for connecting an electrical device. In this way, the cell assembly 1 can be connected to the electrical device through the power transmission wire 9, and the electrical energy of the cell assembly 1 can be output to the electrical device.

[0067] In addition, the battery pack 100 further comprises a BMS (Battery Management System) board. The BMS board 102 is arranged at one end of the cell assembly 1 and is used to monitor the operating state of each cell 11 in the cell assembly 1 to ensure that each cell 11 can operate safely and reliably. The BMS board 102 can monitor and collect the state parameters of the cells 11 in real time, including but not limited to the voltage, temperature, current, battery and resistance of the cells 11. The BMS board 102 can introduce advanced Internet of Things technology to realize seamless connection between the cell assembly 1 and the cloud platform, improve the real-time performance and accuracy of data transmission, support remote monitoring, fault diagnosis and predictive maintenance, and improve the operation and maintenance efficiency and safety. The algorithm and control logic can be optimized to improve the data processing capacity and response speed of the BMS board 102. Advanced balancing technology and thermal management technology are adopted to improve the overall performance of the battery system. In addition, the BMS board 102 can also strengthen the functions of insulation resistance detection and high-voltage interlocking detection to ensure the safe operation of the battery system. Multiple safety protection mechanisms are added in the hardware design and software algorithm to prevent safety accidents of the battery pack 100.

[0068] The application further discloses a vehicle comprising any of the battery packs 100.

[0069] Since the battery pack 100 comprises the cell assembly 1 and the bracket assembly 2, and the cell assembly 1 is clamped between the bracket assembly 2, the bracket assembly 2 is used to fix the cell assembly 1. In this way, the basic structure of the battery pack 100 is constituted, the cell assembly 1 is used to store electric energy, and the bracket assembly 2 plays a role in protecting the cell assembly 1, so as to improve the impact resistance of the battery pack 100, thereby improving the safety of the battery pack 100 and prolonging the service life of the battery pack 100, that is, improving the safety of the vehicle and prolonging the service life of the vehicle.

[0070] Then, since the battery pack 100 further comprises the sealing piece 4, the sealing piece 4 is clamped between the package edge 31 and the bracket assembly 2. Compared with the design scheme of the end of the battery pack 100 in the related art, the sealing piece 4 blocks the path of water entering the inside of the heat-shrinkable sleeve 3 from the outside, thereby enhancing the waterproof effect of the heat-shrinkable sleeve 3, so as to improve the waterproof performance of the battery pack 100. In addition, by arranging the sealing piece 4 between the package edge 31 and the bracket assembly 2, the end of the heat-shrinkable sleeve 3 can be tightened, thereby being able to reduce the width of the gap generated at the package edge 31, so as to further improve the sealing performance of the battery pack 100, thereby improving the waterproof performance of the battery pack 100, so as to further improve the safety of the battery pack 100 and prolong the service life of the battery pack 100, that is, further improving the safety of the vehicle and prolonging the service life of the vehicle.

[0071] It should be noted that the above vehicle can be a motorcycle, a bicycle or a scooter, or other types of vehicles, and the embodiments of the present application do not limit the same.

[0072] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack (100), characterized by, The battery pack (100) comprises: a cell assembly (1); a bracket assembly (2), the cell assembly (1) being clamped between the bracket assemblies (2), the bracket assemblies (2) being used for fixing the cell assembly (1); a heat-shrinkable sleeve (3), the heat-shrinkable sleeve (3) being sleeved on the bracket assemblies (2), the heat-shrinkable sleeve (3) being provided with a hem (31) at an end portion, and the edges of the end portions of the bracket assemblies (2) being wrapped in the hem (31); a sealing member (4), the sealing member (4) being clamped between the hem (31) and the bracket assemblies (2).

2. The battery pack (100) according to claim 1, characterized in that, The hem (31) is a ring-shaped hem.

3. The battery pack (100) according to claim 2, characterized in that, The sealing member (4) is a sealing ring, and the bracket assemblies (2), the sealing ring, and the ring-shaped hem enclose a ring-shaped groove (5).

4. The battery pack (100) according to claim 3, characterized in that, The groove (5) is filled with sealant.

5. The battery pack (100) of claim 3, wherein, The sealing ring is a foam ring.

6. The battery pack (100) of claim 3, wherein, A rubber ring (6) is further provided between the ring-shaped hem and the bracket, and the rubber ring (6) has the same extending direction as the sealing ring.

7. The battery pack (100) according to claim 6, characterized in that Along the plane on which the sealing ring is located, the rubber ring (6) is located inside the sealing ring.

8. The battery pack (100) according to any one of claims 1-7, characterized in that, A rubber layer is provided between the heat-shrinkable sleeve (3) and the bracket assembly (2), and the rubber layer fixedly connects the heat-shrinkable sleeve (3) and the bracket assembly (2).

9. The battery pack (100) according to claim 8, characterized in that, The bracket assembly (2) comprises a first bracket (21) and a second bracket (22), the cell assembly (1) being clamped between the first bracket (21) and the second bracket (22), and the rubber layer comprises a first rubber layer and a second rubber layer. The first rubber layer is used for connecting the first bracket (21) and the inner surface of the heat-shrinkable sleeve (3), and the second rubber layer is used for connecting the second bracket (22) and the inner surface of the heat-shrinkable sleeve (3).

10. A vehicle characterized by comprising: The battery pack (100) of any one of claims 1-9 is included.

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