Battery pack and electric vehicle comprising same

Abstract

The utility model provides a battery pack and an electric vehicle comprising the same, the battery pack comprises a second heating part, and the second heating part is used for heating the battery pack. By adopting the structural form, the battery pack is heated through the second heating part, the quick-change bracket and the battery pack are prevented from being frozen in extreme weather such as extreme freezing rain or heavy snow, and the battery pack and the quick-change bracket can be normally separated, so that the battery pack can be normally and quickly changed, and the quick-change efficiency of the battery pack in the cold region is improved. In addition, the structural form avoids the damage of the battery pack and the quick-change bracket caused by forced battery change, and the service lives of the battery pack and the quick-change bracket are prolonged. In addition, the structural form avoids the damage of the battery pack and the quick-change bracket caused by forced battery change, and the service lives of the battery pack and the quick-change bracket are prolonged.

Description

[0001] This application claims the Chinese invention patent application CN with a filing date of December 2, 2022

[0002] The present application cites the full text of the above-mentioned Chinese patent application. Technical Field

[0003] The utility model relates to a battery pack and an electric vehicle comprising the battery pack. Background Art

[0004] At present, automobile exhaust emissions are still an important factor in environmental pollution. In order to control automobile exhaust, people have developed natural cars, hydrogen fuel cars, solar cars and electric vehicles to replace fuel-powered cars. Among them, electric vehicles have the most promising application prospects. At present, electric vehicles mainly include direct charging and quick-change types. Due to the limitations of charging time and location, many new energy electric vehicles are gradually adopting the mode of quick battery replacement for energy replenishment. Quick-change electric vehicles are equipped with quick-change brackets, which are used to install battery packs. When replacing batteries, the battery replacement equipment of the battery replacement station moves to the bottom of the electric vehicle and is positioned relative to the quick-change bracket of the electric vehicle. However, in extreme low temperatures such as extreme freezing rain and heavy snow in cold areas, the battery pack and the quick-change bracket are frozen, and the battery pack cannot be quickly replaced. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the defect of the prior art that the battery pack and the quick-change bracket are frozen in extreme low temperatures such as extreme freezing rain and heavy snow in cold areas, making it impossible to quickly replace the battery pack, and to provide a battery pack and an electric vehicle containing the same.

[0006] The utility model solves the above technical problems through the following technical solutions:

[0007] The utility model discloses a battery pack. The battery pack comprises a second heating unit. The second heating unit is used for heating the battery pack.

[0008] In this solution, the battery pack is connected to the quick-change bracket. With the above-mentioned structural form, the battery pack is heated by the second heating unit to prevent the quick-change bracket and the battery pack from freezing in extreme weather such as extreme freezing rain or heavy snow, so that the battery pack and the quick-change bracket can be separated normally, so that the battery pack can be quickly replaced normally, and the efficiency of quick replacement of battery packs in cold regions is improved. In addition, the above-mentioned structural form avoids damage to the battery pack and the quick-change bracket caused by forced battery replacement, and improves the service life of the battery pack and the quick-change bracket.

[0009] Preferably, the battery pack includes a battery pack body, and the second heating unit is connected to the battery pack body.

[0010] In this solution, the battery pack body is connected to the quick-change bracket. With the above-mentioned structural form, the battery pack body is heated by the second heating unit to prevent the quick-change bracket and the battery pack body from being frozen in extreme weather such as extreme freezing rain or heavy snow, so that the battery pack body and the quick-change bracket can be separated normally, so that the battery pack body can be quickly replaced normally, and the efficiency of quick replacement of battery packs in cold regions is improved. In addition, the above-mentioned structural form avoids damage to the battery pack body and the quick-change bracket due to forced battery replacement, and improves the service life of the battery pack body and the quick-change bracket.

[0011] Preferably, the battery pack includes a locking piece, which is disposed on the battery pack body, and the second heating portion and the locking piece are connected to the same side of the battery pack body.

[0012] In the present solution, the locking member is connected to the quick-change bracket by means of a locking mechanism connected to the quick-change bracket. The second heating portion and the locking member are connected to the same side of the battery pack body, so that the second heating portion can heat the locking member, thereby preventing the connection position between the locking member and the locking mechanism from being frozen together, making it impossible to quickly replace the battery pack, and ensuring that the battery pack in cold regions can be quickly replaced normally. The above-mentioned structural form is adopted to improve the heating efficiency of the locking member by the second heating, thereby improving the efficiency of quick replacement of battery packs in cold regions. In addition, the above-mentioned structural form avoids damage to the battery pack and the quick-change bracket caused by forced battery replacement, thereby improving the service life of the battery pack and the quick-change bracket.

[0013] Preferably, there is a gap between the second heating portion and the locking member.

[0014] In this solution, by adopting the above-mentioned structural form, the heat generated by the second heating part can be transferred to the locking part through heat conduction, so that the second heating part heats the locking part, thereby preventing the connection position between the locking part and the locking mechanism on the quick-change bracket from being frozen together, causing the battery pack to be unable to be quickly replaced. By adopting the above-mentioned structural form, interference between the second heating part and the locking part can be prevented, so that the second heating part and the locking part can work normally, so that the battery pack body can be stably connected to the locking mechanism, improving the stability and reliability of the battery pack connection to the quick-change bracket.

[0015] Preferably, the battery pack includes a positioning member spaced apart from the locking member, and a gap is provided between the second heating portion and the positioning member.

[0016] In the present solution, the above-mentioned structural form is adopted, and the heat generated by the second heating part can be transferred to the positioning part through heat conduction, and interference between the second heat conducting part and the positioning part can be prevented, so that the positioning part can play a guiding role normally during the installation process of the quick-change battery pack, thereby achieving precise alignment of the quick-change battery pack and the vehicle body, thereby improving the installation accuracy of the quick-change battery pack.

[0017] Preferably, the battery pack comprises a surrounding frame and a battery pack body, wherein the surrounding frame is circumferentially arranged around the battery pack body, the surrounding frame has a containing cavity, and the second heating part is arranged in the containing cavity.

[0018] In this solution, the above-mentioned structural form is adopted, and the surrounding frame is arranged around the battery pack body, so that the battery pack body can be protected by the surrounding frame to prevent external objects from colliding with the battery pack body and causing damage to the battery pack body, thereby increasing the service life of the battery pack body. In addition, the second heating part is arranged in the accommodating cavity, and the second heating part can also be protected by the surrounding frame to prevent external objects from colliding with the second heating part and causing damage to the second heating part, thereby increasing the service life of the second heating part.

[0019] Preferably, the locking member is arranged on a side of the surrounding frame away from the battery pack body, and the second heating portion is arranged on a side of the accommodating cavity close to the locking member.

[0020] In the present solution, the above-mentioned structural form is adopted to improve the thermal conductivity of the second heating part, thereby preventing the locking mechanism and the locking member on the quick-change bracket from being frozen together, ensuring that the battery pack in cold areas can be quickly replaced normally, thereby improving the efficiency of quick replacement of the battery pack.

[0021] Preferably, the second heating part is attached to the battery pack body or the surrounding frame;

[0022] And / or, the second heating portion is wound around the locking member.

[0023] In the present solution, the above-mentioned structural form is adopted, which facilitates the heating of the battery pack body or the frame by the second heating unit, thereby facilitating the heating of the locking piece by the second heating unit, and improving the heating efficiency of the battery pack body or the frame by the second heating unit; it facilitates the arrangement of the second heating unit, makes the fixation of the second heating unit more secure, increases the contact area between the second heating unit and the locking piece, and improves the heating efficiency of the second heating unit.

[0024] Preferably, the second heating part is one or more of a heating plate, a heating belt, an electric heating belt, a heating film, a heating belt, and an electric heating wire;

[0025] And / or, the second heating part comprises a connecting member and a plurality of heating films, and the plurality of heating films are electrically connected via the connecting member;

[0026] And / or, the heating film is provided with a through hole, and the through hole is used for being sleeved on the locking member.

[0027] In the present solution, the above-mentioned structural form is adopted, and multiple heating films are connected to the power supply through connecting parts, which simplifies the heating structure and ensures the heating efficiency; in addition, the through hole opened on the heating film is sleeved on the locking part, and the locking part can be directly heated through the heating film, thereby improving the heating efficiency.

[0028] The utility model also discloses an electric vehicle, which comprises a quick-change bracket and the battery pack as described above.

[0029] In this solution, the battery pack is connected to the quick-change bracket. With the above-mentioned structural form, the battery pack is heated by the second heating unit to prevent the quick-change bracket and the battery pack from freezing in extreme weather such as extreme freezing rain or heavy snow, so that the battery pack and the quick-change bracket can be separated normally, so that the battery pack can be quickly replaced normally, and the efficiency of quick replacement of battery packs in cold regions is improved. In addition, the above-mentioned structural form avoids damage to the battery pack and the quick-change bracket caused by forced battery replacement, and improves the service life of the battery pack and the quick-change bracket.

[0030] Preferably, the quick-change bracket is a body frame of the electric vehicle or the quick-change bracket is arranged on the body frame.

[0031] Preferably, the second heating unit is electrically connected to a vehicle power distribution box or a battery pack.

[0032] In this solution, the above-mentioned structural form is adopted, and the second heating part can be powered by the vehicle distribution box or battery pack, ensuring that the second heating part can normally heat the quick-change bracket, thereby preventing the battery pack and the quick-change bracket from being frozen, and further ensuring normal battery replacement in cold areas.

[0033] Preferably, the electric vehicle further comprises a temperature detection unit, and the temperature detection unit is used to detect the temperature of the battery pack.

[0034] In this solution, by adopting the above-mentioned structural form, the temperature of the battery pack can be detected in real time through the temperature detection unit, thereby ensuring the safety of heating.

[0035] Preferably, the temperature detection portion includes a plurality of temperature detection members, and the plurality of temperature detection members are arranged corresponding to the locking member.

[0036] In this solution, by adopting the above-mentioned structural form, the temperature of the locking member can be detected in real time by the temperature detection member, thereby ensuring the safety of heating.

[0037] Preferably, the temperature detection element includes a grating sensor.

[0038] In this solution, the above-mentioned structural form is adopted, and the grating sensor has the characteristics of high precision, thereby improving the detection accuracy.

[0039] The positive and progressive effects of the utility model are:

[0040] The battery pack is heated by the second heating unit to prevent the quick-change bracket and the battery pack from being frozen in extreme weather such as extreme freezing rain or heavy snow, so that the battery pack and the quick-change bracket can be separated normally, so that the battery pack can be quickly replaced normally, and the efficiency of quick replacement of battery packs in cold regions is improved. In addition, the above structural form avoids damage to the battery pack and the quick-change bracket due to forced battery replacement, and increases the service life of the battery pack and the quick-change bracket. In addition, the above structural form avoids damage to the battery pack and the quick-change bracket due to forced battery replacement, and increases the service life of the battery pack and the quick-change bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A first structural schematic diagram of a battery pack according to an embodiment of the utility model;

[0042] Figure 2 A second structural schematic diagram of a battery pack according to an embodiment of the utility model;

[0043] Figure 3 A third structural schematic diagram of a battery pack according to an embodiment of the utility model;

[0044] Figure 4 A fourth structural schematic diagram of a battery pack according to an embodiment of the utility model;

[0045] Figure 5 A fifth structural schematic diagram of a battery pack according to an embodiment of the present utility model;

[0046] Figure 6 A sixth structural schematic diagram of a battery pack according to an embodiment of the present utility model;

[0047] Figure 7 The seventh structural schematic diagram of the battery pack according to the embodiment of the utility model;

[0048] Figure 8 The eighth structural schematic diagram of the battery pack according to the embodiment of the utility model;

[0049] Fig. 9 It is a ninth structural schematic diagram of a battery pack according to an embodiment of the utility model;

[0050] Fig.10 The tenth structural schematic diagram of the battery pack according to the embodiment of the utility model;

[0051] Fig.11 This is an eleventh structural schematic diagram of a battery pack according to an embodiment of the utility model;

[0052] Fig.12 This is a schematic diagram of the first part of the structure of the electric vehicle according to an embodiment of the utility model;

[0053] Fig.13 This is a schematic diagram of the second part of the structure of the electric vehicle according to an embodiment of the utility model.

[0054] Description of reference numerals:

[0055] Electric Vehicles 1000

[0056] Quick change device 100

[0057] Quick change bracket 1

[0058] Locking mechanism 14

[0059] Battery Pack 200

[0060] Battery pack body 2001

[0061] Sidewall 20011

[0062] Battery pack box 20012

[0063] Frame 2002

[0064] Locking piece 2003

[0065] Lock shaft 20031

[0066] Positioning parts 2004

[0067] Second heating unit 2

[0068] Heating film 21

[0069] Through hole 212

[0070] Connector 22

[0071] Fixing 23 DETAILED DESCRIPTION

[0072] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0073] like Figures 1 to 11As shown, the utility model provides a battery pack 200, and the battery pack 200 includes a second heating part 2, and the second heating part 2 is used to heat the battery pack 200. Specifically, the battery pack 200 is connected to the quick-change bracket 1. With the above-mentioned structural form, the battery pack 200 is heated by the second heating part 2, so as to prevent the quick-change bracket 1 and the battery pack 200 from being frozen in extreme weather such as extreme freezing rain or heavy snow, so that the battery pack 200 and the quick-change bracket 1 can be separated normally, so that the battery pack 200 can be quickly replaced normally, and the efficiency of quick replacement of the battery pack 200 in cold regions is improved. In addition, the above-mentioned structural form avoids damage to the battery pack 200 and the quick-change bracket 1 caused by forced battery replacement, and improves the service life of the battery pack 200 and the quick-change bracket 1.

[0074] In this embodiment, the second heating part 2 is in the form of a heating film 21. In other embodiments, the second heating part 2 can also be one or more of a heating wire, a heating plate, a heating belt, an electric heating belt, and a heating belt, and the type of the second heating part 2 can be selected according to actual needs.

[0075] like Figures 1 to 7 As shown, the battery pack 200 includes a battery pack body 2001, and the second heating unit 2 is connected to the battery pack body 2001. The battery pack body 2001 includes a battery pack case 20012, and a battery cell disposed in the battery pack case 20012. The battery pack case 20012 includes two side walls 20011 disposed in the width direction of the battery pack case 20012, which are used to set the locking member 2003 of the battery pack 200. The battery pack case 20012 also includes two side walls 20011 disposed in the length direction of the battery pack case 20012, which are used to set the electrical connector of the battery pack 200. Specifically, the battery pack body 2001 is connected to the quick-change bracket 1. With the above structure, the battery pack body 2001 is heated by the second heating unit 2 to prevent the quick-change bracket 1 and the battery pack body 2001 from freezing in extreme weather such as extreme freezing rain or heavy snow, so that the battery pack body 2001 and the quick-change bracket 1 can be separated normally, so that the battery pack body 2001 can be quickly replaced normally, and the efficiency of quick replacement of the cold-region battery pack 200 is improved. In addition, the above structure avoids damage to the battery pack body 2001 and the quick-change bracket 1 caused by forced battery replacement, and improves the service life of the battery pack body 2001 and the quick-change bracket 1.

[0076] like Figures 8 to 11As shown, the battery pack 200 includes a locking member 2003, which is disposed on the battery pack body 2001, and the second heating unit 2 and the locking member 2003 are connected to the same side of the battery pack body 2001. Specifically, the second heating unit 2 is disposed on the side wall 20011 of the exposed battery pack case 20012, and the locking member 2003 is connected to the locking mechanism 14 on the quick-change bracket 1 to achieve the connection between the battery pack 200 and the quick-change bracket 1. The second heating unit 2 and the locking member 2003 are connected to the same side of the battery pack body 2001, so that the second heating unit 2 can heat the locking member 2003, thereby preventing the connection position of the locking member 2003 and the locking mechanism 14 from being frozen together, causing the battery pack 200 to be unable to be quickly replaced, and ensuring that the battery pack 200 in cold regions can be quickly replaced normally. The above structure improves the heating efficiency of the second heating unit 2 on the locking member 2003, thereby improving the efficiency of quick replacement of the cold region battery pack 200. In addition, the above structure avoids damage to the battery pack 200 and the quick replacement bracket 1 caused by forced battery replacement, thereby improving the service life of the battery pack 200 and the quick replacement bracket 1.

[0077] In this example, see Figures 9 to 11 It is understood that the second heating unit 2 includes a heating film 21 and a connector 22, a plurality of heating films 21 are electrically connected via the connector 22, and a plurality of heating films 21 located on the same side are connected in series. In order to facilitate the connection between the heating film 21 and the connector 22, it is preferred that each heating film 21 is electrically connected to the connector 22 via a fixing member 23.

[0078] The locking member 2003 includes a mounting seat, a locking shaft 20031 and a supporting shaft, wherein the locking shaft 20031 and the supporting shaft are arranged on opposite sides of the mounting seat, and the mounting seat is used to be installed on the side wall 20011 of the battery pack case 20012. The supporting shaft is used to be inserted into the battery pack case 20012 and act on the battery pack case 20012, and one end of the locking shaft 20031 is connected to the mounting seat, and the other end of the locking shaft 20031 extends in a direction close to the locking mechanism 14, and is used to cooperate with the locking mechanism 14 on the quick-change bracket 1. In specific use, a through hole 212 is provided on the heating film 21, and the through hole 212 is used to be sleeved on the locking member 2003. The heating film 21 is sleeved on the lock shaft 20031 through the through hole 212, and the heating film 21 is attached to the exposed side wall 20011 of the battery pack box 20012, so that the heating film 21 can directly heat the lock shaft 20031, thereby improving the heating efficiency of the heating film 21 heating the lock shaft 20031.

[0079] Specifically, Fig.10 and Fig.11As shown, the side wall 20011 of the battery pack box 20012 is in a stepped shape. In order to increase the stability and reliability of the connection between the second heating unit 2 and the side wall 20011, the fixing member 23 is preferably clamped on the step, and the connecting member 22 is attached to the upper surface of the step.

[0080] In actual use, there are multiple locking members 2003, which are arranged at intervals around the battery pack case 20012, thereby improving the stability of the connection between the battery pack body 2001 and the quick-change bracket 1. Specifically, one end of the locking member 2003 is connected to the side wall 20011 of the battery pack body 2001, and the other end of the locking member 2003 extends in a direction close to the locking mechanism 14, thereby facilitating the cooperation between the locking member 2003 and the locking mechanism 14, thereby realizing the connection of the battery pack 200 to the quick-change bracket 1.

[0081] In other embodiments, there may also be a gap between the second heating portion 2 and the locking member 2003. In other words, the second heating portion 2 may be disposed between two adjacent locking members 2003, so that the heat generated by the second heating portion 2 may be transferred to each locking member 2003 through heat conduction, thereby achieving heating of the locking member 2003 by the second heating portion 2, thereby preventing the connection position of the locking member 2003 and the locking mechanism 14 on the quick-change bracket 1 from being frozen together, thereby preventing the battery pack 200 from being quickly replaced. The above-mentioned structural form can prevent interference between the second heating portion 2 and the locking member 2003, so that the second heating portion 2 and the locking member 2003 can work normally, so that the battery pack body 2001 can be stably connected to the locking mechanism 14, thereby improving the stability and reliability of the battery pack 200 connected to the quick-change bracket 1. The second heating portion 2 may be connected to the side wall 20011 of the battery pack case 20012 through an external fixing mechanism.

[0082] During specific use, the gap between the second heating part 2 and the locking member 2003 can be set according to actual needs, and the specific value of the gap is not limited here.

[0083] In other embodiments, the battery pack 200 further includes a positioning member 2004 spaced apart from the locking member 2003, and a gap is provided between the second heating portion 2 and the positioning member 2004. The heat generated by the second heating portion 2 can be transferred to the positioning member 2004 by heat conduction, thereby preventing the positioning member 2004 and the quick-change bracket 1 from freezing, and preventing interference between the second heating portion 2 and the positioning member 2004, so that the positioning member 2004 can normally play a guiding role during the installation of the quick-change battery pack 200, thereby accurately aligning the quick-change battery pack 200 with the vehicle body, thereby improving the installation accuracy of the quick-change battery pack 200.

[0084] Specifically, a plurality of positioning members 2004 are arranged on the two side walls 20011 at intervals along the length direction of the battery pack body 2001 to clamp the quick-change battery pack 200 on the vehicle body. The positioning members 2004 play a guiding role in the installation process of the quick-change battery pack 200, and accurately align the quick-change battery pack 200 with the vehicle body, so that the installation accuracy of the quick-change battery pack 200 is higher, and after the quick-change battery pack 200 is installed, it abuts against the quick-change bracket 1 on the electric vehicle 1000 to limit the shaking of the battery pack 200 and ensure stable and reliable locking. At the same time, after the quick-change battery pack 200 is installed, the two sides of the quick-change battery pack 200 abut against the vehicle body through a plurality of positioning members 2004, so that the two sides of the quick-change battery pack 200 have a certain force on the vehicle body in the width direction, effectively reducing the shaking of the quick-change battery pack 200 and improving the service life of the quick-change battery pack 200.

[0085] During specific use, the gap between the second heating part 2 and the positioning member 2004 can be set according to actual needs, and the specific value of the gap is not limited here.

[0086] In other embodiments, the battery pack 200 includes a frame 2002 and a battery pack body 2001, the frame 2002 is circumferentially arranged around the battery pack body 2001, the frame 2002 has a receiving cavity, and the second heating unit 2 is arranged in the receiving cavity. With the above-mentioned structural form, the frame 2002 is circumferentially arranged around the battery pack body 2001, so that the battery pack body 2001 can be protected by the frame 2002 to prevent external objects from colliding with the battery pack body 2001 and causing damage to the battery pack body 2001, thereby improving the service life of the battery pack body 2001. In addition, by arranging the second heating unit 2 in the receiving cavity, the second heating unit 2 can also be protected by the frame 2002 to prevent external objects from colliding with the second heating unit 2 and causing damage to the second heating unit 2, thereby improving the service life of the second heating unit 2.

[0087] The material of the surrounding frame 2002 is a profile, and the second heating unit 2 can be arranged in the profile cavity, such as by gluing or other mechanical fixing mechanisms.

[0088] In actual use, the frame 2002 and the battery pack body 2001 are detachably connected, so that if one of the frame 2002 and the battery pack body 2001 is damaged, only the damaged frame 2002 and the battery pack body 2001 need to be replaced for normal use, thereby reducing the cost of use. In addition, the above structural form facilitates the processing of the battery pack 200.

[0089] In other embodiments, the locking member 2003 is disposed on a side of the enclosure 2002 away from the battery pack body 2001, and the second heating unit 2 is disposed on a side of the accommodating cavity close to the locking member 2003. That is, one end of the locking member 2003 is connected to the enclosure 2002, and the other end is located outside the enclosure 2002, while the second heating unit 2 is located in the accommodating cavity in the enclosure 2002. The above structure improves the heat conduction efficiency of the second heating unit 2, thereby preventing the locking mechanism 14 on the quick-change bracket 1 from being frozen together with the locking member 2003, ensuring that the cold region battery pack 200 can be quickly replaced normally, thereby improving the efficiency of the quick replacement of the battery pack 200.

[0090] The second heating part 2 can be attached to the battery pack body 2001 or the frame 2002; the second heating part 2 can also be wound around the locking member 2003; the second heating part 2 can also be attached to the battery pack body 2001 or the frame 2002, and also be wound around the locking member 2003. Preferably, the second heating part 2 is attached to the battery pack body 2001 or the frame 2002, and also is wound around the locking member 2003. The above-mentioned structural form facilitates the heating of the battery pack body 2001 or the frame 2002 by the second heating part 2, thereby facilitating the heating of the locking member 2003 by the second heating part 2, and improving the heating efficiency of the battery pack body 2001 or the frame 2002 by the second heating part 2; in addition, the above-mentioned structural form facilitates the arrangement of the second heating part 2, makes the second heating part 2 more firmly fixed, increases the contact area between the second heating part 2 and the locking member 2003, and improves the heating efficiency of the second heating part 2.

[0091] like Fig.12 and Fig.13 As shown, the present embodiment also provides an electric vehicle 1000, which includes a quick-change bracket 1 and a battery pack 200. Specifically, the battery pack 200 is applied to the electric vehicle 1000, and the battery pack 200 can be connected to the quick-change bracket 1. With the above-mentioned structural form, the battery pack 200 is heated by the second heating unit 2 to prevent the quick-change bracket 1 and the battery pack 200 from being frozen in extreme weather such as extreme freezing rain or heavy snow, so that the battery pack 200 and the quick-change bracket 1 can be separated normally, so that the battery pack 200 can be quickly replaced normally, and the efficiency of quick replacement of the battery pack 200 in cold areas is improved. In addition, the above-mentioned structural form avoids damage to the battery pack 200 and the quick-change bracket 1 due to forced battery replacement, thereby improving the service life of the battery pack 200 and the quick-change bracket 1.

[0092] In this embodiment, the quick-change bracket 1 is a body frame of the electric vehicle 1000 or the quick-change bracket 1 is disposed on the body frame.

[0093] The second heating unit 2 is electrically connected to the vehicle power distribution box or the battery pack 200. With the above structure, the second heating unit 2 can be powered by the vehicle power distribution box or the battery pack 200, ensuring that the second heating unit 2 can normally heat the quick-change bracket 1, thereby preventing the battery pack 200 and the quick-change bracket 1 from being frozen, thereby ensuring normal battery replacement in cold areas.

[0094] In this embodiment, the second heating unit 2 is electrically connected to the vehicle power distribution box. In order to improve the safety of use, it is preferred that the second heating unit 2 uses low-voltage electricity.

[0095] In other embodiments, a battery can be arranged on the quick-change bracket 1, and the battery is electrically connected to the battery pack 200 and the second heating part 2 respectively, so that the battery pack 200 can charge the battery and store the power in the battery. When the second heating part 2 needs power, the battery directly supplies power to the second heating part 2.

[0096] In other embodiments, the electric vehicle 1000 further includes a temperature detection unit, which is used to detect the temperature of the battery pack 200 , so that the temperature of the quick-change device 100 can be detected in real time through the temperature detection unit, thereby ensuring the safety of heating.

[0097] The temperature detection part includes a plurality of temperature detection members, and the plurality of temperature detection members are arranged corresponding to the locking member 2003. With the above-mentioned structural form, the temperature of the locking member 2003 can be detected in real time by the temperature detection member, thereby ensuring the safety of heating. Preferably, the plurality of temperature detection members are arranged in a one-to-one correspondence with the plurality of locking members 2003, so that each locking mechanism 14 can have a temperature detection member to detect the temperature thereof.

[0098] In this embodiment, the temperature detection element includes a grating sensor, and the grating sensor has the characteristic of high precision, thereby improving the detection accuracy.

[0099] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A battery pack, characterized in that: The battery pack includes a second heating unit, and the second heating unit is used to heat the battery pack; The battery pack includes a battery pack body, and the second heating unit is connected to the battery pack body; The battery pack body includes a battery pack case and a battery cell arranged in the battery pack case, and the second heating part is arranged on the exposed side wall of the battery pack case.

2. The battery pack according to claim 1, characterized in that: The battery pack includes a locking member, which is disposed on the battery pack body, and the second heating portion and the locking member are connected to the same side of the battery pack body.

3. The battery pack according to claim 2, characterized in that: There is a gap between the second heating portion and the locking member; And / or, the battery pack includes a positioning member spaced apart from the locking member, and a gap is provided between the second heating portion and the positioning member.

4. The battery pack according to claim 2, characterized in that: The battery pack includes a surrounding frame and a battery pack body. The surrounding frame is circumferentially arranged around the battery pack body. The surrounding frame has a containing cavity, and the second heating part is arranged in the containing cavity.

5. The battery pack according to claim 4, characterized in that: The locking member is arranged on a side of the surrounding frame away from the battery pack body, and the second heating portion is arranged on a side of the accommodating cavity close to the locking member.

6. The battery pack according to claim 2 or 4, characterized in that: The second heating part is attached to the battery pack body or the surrounding frame; And / or, the second heating portion is wound around the locking member.

7. The battery pack according to any one of claims 1 to 5, characterized in that: The second heating part is one or more of a heating plate, a heating belt, an electric heating belt, a heating film, a heating belt, and an electric heating wire; And / or, the second heating part comprises a connecting member and a plurality of heating films, and the plurality of heating films are electrically connected via the connecting member; And / or, the battery pack includes a locking piece, the heating film has a through hole, and the through hole is used to be sleeved on the locking piece.

8. An electric vehicle, characterized in that: The electric vehicle comprises a quick-change bracket and a battery pack as described in any one of claims 1-7.

9. The electric vehicle according to claim 8, characterized in that: The quick-change bracket is the body frame of the electric vehicle or the quick-change bracket is arranged on the body frame; And / or, the second heating unit is electrically connected to the vehicle power distribution box or battery pack.

10. The electric vehicle according to claim 8, characterized in that: The electric vehicle further includes a temperature detection unit configured to detect a temperature of the battery pack.

11. The electric vehicle according to claim 10, characterized in that: The temperature detection portion includes a plurality of temperature detection members, and the plurality of temperature detection members are arranged corresponding to the locking member.

12. The electric vehicle according to claim 11, characterized in that: The temperature detection element includes a grating sensor.

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