Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack comprises a first battery, a second battery and a connecting piece, wherein the first battery is provided with a first cover plate and a pole electrically connected with the first cover plate; the second battery is provided with a second cover plate, and the second cover plate is electrically connected with a tab of the second battery; one end of the connecting piece is connected with the pole, the other end of the connecting piece is connected with the second cover plate, and the pole and the second cover plate are electrically conducted through the connecting piece; at least part of the pole protrudes out of the first cover plate. By increasing the area of the connecting surface of the pole and the first cover plate, the contact area of the pole and the connecting piece can be increased, so that the current-carrying surface of the connecting piece is enlarged, the current-carrying capacity of the connecting piece is improved, the current of the first battery and the second battery is improved, the performance of the battery is improved, and the problem that the current-carrying capacity of the cover plate is poor and the service life of the battery is prolonged is solved. And the performance of the battery is relatively poor.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a battery pack and an electrical device. Background Art

[0002] The battery is the power source that provides power for tools, mostly referring to the storage battery or rechargeable battery that powers electric cars, electric trains, electric bicycles, and golf carts.

[0003] Current batteries typically consist of a positive electrode cover, a negative electrode cover, and an aluminum shell. The positive and negative electrode covers are mounted on the aluminum shell, and the positive and negative electrodes of two adjacent batteries are electrically connected to form a battery pack. For example, if two batteries are connected in series, the positive electrode of one battery is connected to the negative electrode of the other via a connector. One end of the connector is fixedly connected to the terminal post on the positive electrode cover, and the other end is fixedly connected to the terminal post on the negative electrode cover.

[0004] In the related art, the current carrying capacity of the cover plate is poor, resulting in poor battery performance. Utility Model Content

[0005] The embodiments of the present application provide a battery pack and an electrical device that can solve the problem of poor current carrying capacity of the cover plate, which leads to poor battery performance.

[0006] The embodiments of this application provide the following technical solutions:

[0007] A first aspect of an embodiment of the present application provides a battery pack, comprising:

[0008] A first battery having a first cover and a terminal electrically connected to the first cover;

[0009] A second battery has a second cover plate, the second cover plate being electrically connected to the tab of the second battery;

[0010] A connector, one end of the connector is connected to the pole, the other end of the connector is connected to the second cover plate, and the pole and the second cover plate are electrically connected through the connector;

[0011] Wherein, at least a portion of the pole protrudes from the first cover plate.

[0012] In a battery pack of this structure, the pole is arranged on the first battery, the second cover is connected to the pole ear of the second battery, and the pole and the second cover are electrically conductive through a connector, so that the first battery and the second battery are conductively connected through the connector. The pole can be arranged on the first cover, and the area of ​​the connection surface between the pole and the first cover is increased, which can increase the contact area between the pole and the connector, thereby increasing the current-carrying surface of the connector to improve the current-carrying capacity of the connector, thereby increasing the current of the first battery and the second battery, and improving the performance of the battery.

[0013] In a feasible embodiment, the first cover plate and the second cover plate are made of different materials.

[0014] In the battery pack of this structure, the first battery and the second battery can form a continuous potential difference path to increase the total potential difference of the battery pack, thereby increasing the voltage of the battery pack and improving the performance of the battery pack.

[0015] In a feasible embodiment, the pole is formed with a first conductive layer and a second conductive layer, and the first conductive layer and the second conductive layer are connected;

[0016] The first conductive layer is located on a side of the second conductive layer facing away from the connecting element.

[0017] In the battery pack of this structure, the first conductive layer and the second conductive layer are electrically connected, and the provision of the pole reduces the heat generated by the connector, thereby improving the connection strength between the first battery and the second battery.

[0018] In a feasible implementation manner, the first conductive layer and the first cover plate are made of the same material, and the second conductive layer and the second cover plate are made of the same material.

[0019] In a battery pack of this structure, the first cover plate and the first conductive layer are made of the same material, and the second cover plate and the second conductive layer are made of the same material. This can reduce the direct contact area between the first cover plate and the second cover plate, and the contact area between the first conductive layer and the second conductive layer is small, which has the advantage of fast heat dissipation speed; it can also increase the conductivity of the battery pack and improve the charging speed.

[0020] In a feasible embodiment, the first cover plate is made of a first conductive material, the second cover plate is made of a second conductive material, and the first conductive material and the second conductive material are different;

[0021] The pole is a composite of a first conductive material and a second conductive material.

[0022] In the battery pack of this structure, the arrangement of the composite member of the first conductive material and the second conductive material can improve the conductivity of the first battery, thereby increasing the charging speed of the battery pack and thus improving the performance of the battery pack.

[0023] In a feasible embodiment, the first cover plate and the pole are integrally formed;

[0024] The pole is extended toward a side away from the first battery.

[0025] In this battery pack structure, the first cover plate and the terminal are integrally formed, reducing the difficulty of manufacturing the first cover plate and the terminal and improving the connection strength between the first cover plate and the terminal. The terminal extends toward the side away from the first battery cell, guiding the installation of the connector, offering the advantages of easy installation and convenient processing. Furthermore, the protrusion can directly connect to the connector, increasing the connection area between the connector and the first cover plate, thereby improving the current carrying capacity of the first cover plate. By adaptively increasing the connection area between the connector and the second cover plate, the current carrying capacity of the battery pack can be increased, thereby improving the performance of the battery pack.

[0026] In a feasible implementation, the first cover plate is made of a first conductive material and a second conductive material, the second cover plate is made of a second conductive material, and the first conductive material and the second conductive material are different.

[0027] In the battery pack of this structure, the first conductive material and the second conductive material can form a continuous potential difference path to increase the total potential difference of the battery pack, thereby increasing the voltage of the battery pack and improving the performance of the battery pack.

[0028] In a feasible embodiment, the first cover plate is formed with a third conductive layer and a fourth conductive layer, and the third conductive layer and the fourth conductive layer are connected;

[0029] The third conductive layer is located on a side of the fourth conductive layer facing away from the connecting element.

[0030] In the battery pack of this structure, the provision of the third conductive layer and the fourth conductive layer can improve the conductivity of the first cover plate, thereby increasing the charging speed of the first battery and improving the performance of the battery pack.

[0031] In a feasible implementation manner, the third conductive layer is made of the same material as the first cover plate, and the fourth conductive layer is made of the same material as the second cover plate.

[0032] In a battery pack of this structure, the third conductive layer and the fourth conductive layer are made of different materials. The third conductive layer and the fourth conductive layer cooperate to form a continuous potential difference path to increase the total potential difference of the battery pack, thereby increasing the voltage of the battery pack and improving the performance of the battery pack.

[0033] In a feasible embodiment, the connection between the connecting member and the pole is protruding from the connection surface between the connecting member and the second cover plate.

[0034] In a battery pack of this structure, the connector can act as a buffer when the battery pack is subjected to vibration, thereby reducing the stress on the pole, thereby extending the service life of the pole and thus extending the service life of the battery pack; and the connection between the connector and the pole protrudes from the connection surface of the connector and the second cover plate, which can guide the operator to the installation position of the pole and the connector, thereby reducing the difficulty of installation between the pole and the connector, thereby improving the installation efficiency of the pole and the connector.

[0035] In a feasible embodiment, the connecting member includes: a first connecting section, a second connecting section and a third connecting section connected in sequence; the first connecting section is connected to the pole, the third connecting section is connected to the second cover plate, the first connecting section and the second connecting section are arranged at an angle, and the second connecting section and the third connecting section are arranged at an angle.

[0036] In a battery pack with this structure, the first and second connecting segments are arranged at an angle, which can act as a buffer when the battery pack is subjected to vibration. This reduces the likelihood of the first and second connecting segments breaking due to stress concentration during vibration, thereby extending the service life of the first and second connecting segments, and thus extending the service life of the battery pack. The second and third connecting segments are arranged at an angle, which can act as a buffer when the battery pack is subjected to vibration, thereby reducing the likelihood of the second and third connecting segments breaking due to stress concentration during vibration, thereby extending the service life of the second and third connecting segments, and thus extending the service life of the battery pack.

[0037] In a feasible embodiment, the pole is formed with a first limiting portion, the first cover plate is formed with a second limiting portion, and the first limiting portion and the second limiting portion are connected; the first limiting portion is located on the side of the second limiting portion away from the first battery, and the second limiting portion is used to limit the movement of the first limiting portion toward the side close to the first battery.

[0038] In a battery pack of this structure, the first limiting portion and the second limiting portion are connected, and the second limiting portion can limit the movement of the first limiting portion toward the side close to the first battery, so that the first cover plate can limit the movement of the pole toward the side close to the first battery, so as to assist in limiting the installation of the pole and the first cover plate, and can improve the connection strength between the pole and the first cover plate, thereby providing safety protection for the first battery.

[0039] In a feasible implementation manner, the pole is a circular pole, and the circular pole is arranged on the first cover plate.

[0040] And / or, the pole is a square pole, and at least a portion of the square pole is arranged parallel to the first cover plate.

[0041] In this battery pack structure, the circular pole is mounted on the first cover. The circular pole is easy to manufacture and reduces the difficulty of connecting to the first cover, thereby improving the installation efficiency of the first cover and the circular pole. Increasing the length of the square pole increases its surface area, thereby increasing the area of ​​the connection surface between the square pole and the first cover. Adaptively increasing the area of ​​the connection surface between the connector and the pole, as well as the area of ​​the connection surface between the connector and the second cover, can improve the current carrying capacity of the connector, thereby increasing the current of the first and second batteries and improving battery performance.

[0042] In a feasible embodiment, the thickness of the third conductive layer is 0.5 mm to 3 mm;

[0043] The thickness of the fourth conductive layer is 1 mm to 3.5 mm.

[0044] In the battery pack of this structure, the third conductive layer and the fourth conductive layer are set to different thicknesses, which can improve the conductivity of the first cover plate while improving the connection stability of the first cover plate, thereby increasing the charging speed and service life of the first battery.

[0045] A second aspect of an embodiment of the present application provides an electric device, including an electric device and a battery pack, wherein the battery pack is used to provide electric energy to the electric device.

[0046] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the battery packs and electrical equipment provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0048] Figure 1 A schematic diagram of the main structure of a first battery provided in an embodiment of the present application;

[0049] Figure 2 A schematic diagram of the connection structure of the first battery, the second battery, and the connector provided in an embodiment of the present application;

[0050] Figure 3A schematic diagram of the connection structure of a first battery, a terminal and a connector provided in an embodiment of the present application;

[0051] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0052] Figure 5 A schematic diagram of the main structure of a pole provided in an embodiment of the present application;

[0053] Figure 6 A schematic diagram of the main structure of the first cover plate provided in an embodiment of the present application;

[0054] Figure 7 A schematic diagram of the main structure of the connector provided in an embodiment of the present application.

[0055] Description of reference numerals:

[0056] 100 - first battery; 101 - first cover; 1011 - third conductive layer; 1012 - fourth conductive layer; 102 - pole; 1021 - first conductive layer; 1022 - second conductive layer;

[0057] 200 - second battery; 201 - second cover;

[0058] 300 - connecting piece; 301 - first connecting section; 302 - second connecting section; 303 - third connecting section. DETAILED DESCRIPTION

[0059] Battery is the power source that provides power for tools, mostly referring to the storage battery or rechargeable battery that powers electric cars, electric trains, electric bicycles, and golf carts.

[0060] Current batteries typically consist of a positive electrode cover, a negative electrode cover, and an aluminum shell. The positive and negative electrode covers are mounted on the aluminum shell, and the positive and negative electrodes of two adjacent batteries are electrically connected to form a battery pack. For example, if two batteries are connected in series, the positive electrode of one battery is connected to the negative electrode of the other via a connector. One end of the connector is fixedly connected to the terminal post on the first cover, and the other end is fixedly connected to the terminal post on the second cover.

[0061] In related technologies, the cross-sectional area of ​​the pole determines the current capacity allowed to pass through the cover. Due to the limitation of the battery width direction, the size and installation position of the pole will be restricted, resulting in the deterioration of the current carrying capacity of the cover and the deterioration of the battery performance.

[0062] An embodiment of the present application provides a battery pack, wherein a pole is arranged on a first battery, a second cover is connected to a pole ear of a second battery, and the pole and the second cover are electrically conductively connected through a connector, so that the first battery and the second battery are conductively connected through the connector. The pole can be arranged on the first cover, and the area of ​​the connection surface between the pole and the first cover is increased, which can increase the contact area between the pole and the connector, thereby increasing the current-carrying surface of the connector to increase the current-carrying capacity of the connector, thereby increasing the current of the first battery and the second battery, and improving the performance of the battery.

[0063] like Figure 1 and Figure 2 As shown, the battery pack provided by the embodiment of the present application includes: a first battery 100, a second battery 200, and a connector 300. The first battery 100 has a first cover 101 and a terminal 102 electrically connected to the first cover 101; the second battery 200 has a second cover 201, which is electrically connected to the tab of the second battery 200; one end of the connector 300 is connected to the terminal 102, and the other end of the connector 300 is connected to the second cover 201. The terminal 102 and the second cover 201 are electrically connected through the connector 300; at least a portion of the terminal 102 protrudes from the first cover 101.

[0064] like Figure 3 and Figure 4 As shown, it can be understood that the portion of the pole 102 protruding from the first cover 101 is connected to one end of the connector 300, and the other end of the connector 300 is connected to the second cover 201; by providing an electrical connection between the second cover 201 and the tab of the second battery 200, the first battery 100 and the second battery 200 can be conductively connected through the connector 300.

[0065] It should be noted that increasing the area of ​​the connection surface between the pole 102 and the first cover plate 101, and adaptively increasing the area of ​​the connection surface between the connector 300 and the pole 102 and the area of ​​the connection surface between the connector 300 and the second cover plate 201, can improve the current carrying capacity of the connector 300, thereby increasing the current of the first battery 100 and the second battery 200, thereby improving the performance of the battery.

[0066] It should be noted that the pole 102 is used to connect the first cover plate 101 and the second cover plate 201, and mainly plays the role of connection and current carrying. By providing the pole 102, it is convenient for the connector 300 to connect the first cover plate 101 and the second cover plate 201, and to assist in confirming the connection position of the first cover plate 101 and the connector 300, thereby improving the connection efficiency of the first battery 100 and the second battery 200.

[0067] The first cover plate 101 and the second cover plate 201 provided in the embodiment of the present application are made of different materials.

[0068] In related technologies, in a battery, the positive electrode provides electrons to the negative electrode, generating a potential difference. Its primary function is to accept electrons and chemically react with ions in the electrolyte, releasing electrons while simultaneously reducing the ions to atomic or molecular form. The negative electrode's primary function is to accept electrons from the positive electrode, neutralizing the charge and releasing energy in the process.

[0069] It should be noted that the first cover plate 101 and the second cover plate 201 can be arranged in a variety of different ways. The following describes the arrangement of the first cover plate 101 and the second cover plate 201 in turn with examples.

[0070] In a feasible embodiment, the first cover plate 101 is the negative electrode cover plate of the first battery 100, and the second cover plate 201 is the positive electrode cover plate of the second battery 200. The negative electrode of the first battery 100 and the positive electrode of the second battery 200 are electrically connected, which can increase the voltage of the battery pack to improve the performance of the battery pack.

[0071] It should be noted that the materials of the first cover plate 101 and the second cover plate 201 are different, so that the negative electrode of the first battery 100 and the positive electrode of the second battery 200 can form a continuous potential difference path to increase the total potential difference of the battery pack, thereby increasing the voltage of the battery pack and improving the performance of the battery pack.

[0072] In another feasible embodiment, the first cover plate 101 is the positive electrode cover plate of the first battery 100, and the second cover plate 201 is the negative electrode cover plate of the second battery 200. The positive electrode of the first battery 100 and the negative electrode of the second battery 200 are electrically connected, which can increase the voltage of the battery pack to improve the performance of the battery pack.

[0073] It should be noted that the materials of the first cover plate 101 and the second cover plate 201 are different, so that the positive electrode of the first battery 100 and the negative electrode of the second battery 200 can form a continuous potential difference path to increase the total potential difference of the battery pack, thereby increasing the voltage of the battery pack and improving the performance of the battery pack.

[0074] It is understandable that there is no restriction on the specific configuration of the first cover plate 101 and the second cover plate 201 , and they can be selected according to actual use requirements. It is only necessary to ensure that the first cover plate 101 and the second cover plate 201 are electrically connected through the connector 300 .

[0075] It should be noted that the first cover plate 101 and the second cover plate 201 are made of a variety of different materials. The materials of the first cover plate 101 and the second cover plate 201 are described below with examples.

[0076] In a feasible implementation manner, the first cover plate 101 is a copper cover plate, and the second cover plate 201 is an aluminum cover plate.

[0077] In another feasible embodiment, the first cover plate 101 is a graphite cover plate, and the second cover plate 201 is a lithium iron phosphate cover plate.

[0078] It is understandable that there is no restriction on the materials of the first cover plate 101 and the second cover plate 201 , and they can be selected according to actual usage requirements. It is only necessary to ensure that the first cover plate 101 is the negative electrode cover plate of the first battery 100 and the second cover plate 201 is the positive electrode cover plate of the second battery 200 .

[0079] like Figure 5 As shown, the pole 102 provided in the embodiment of the present application is formed with a first conductive layer 1021 and a second conductive layer 1022 , which are connected; the first conductive layer 1021 is located on the side of the second conductive layer 1022 away from the connector 300 .

[0080] It should be noted that the first conductive layer 1021 and the second conductive layer 1022 are electrically connected, and the provision of the pole 102 reduces the heat generated by the connector 300 , thereby improving the connection strength between the first battery 100 and the second battery 200 .

[0081] In the embodiment of the present application, the first conductive layer 1021 is made of the same material as the first cover plate 101 , and the second conductive layer 1022 is made of the same material as the second cover plate 201 .

[0082] It can be understood that the first cover plate 101 and the first conductive layer 1021 are made of the same material, and the second cover plate 201 and the second conductive layer 1022 are made of the same material, which can reduce the contact area of ​​the first cover plate 101 and the second cover plate 201 in direct contact, and the contact area between the first conductive layer 1021 and the second conductive layer 1022 is small, which has the advantage of fast heat dissipation speed; and can increase the conductivity of the battery pack and improve the charging speed.

[0083] The first cover plate 101 provided in the embodiment of the present application is made of a first conductive material, the second cover plate 201 is made of a second conductive material, and the first conductive material and the second conductive material are different; the pole 102 is a composite of the first conductive material and the second conductive material.

[0084] It can be understood that the provision of the composite member of the first conductive material and the second conductive material can improve the conductivity of the first battery 100, thereby increasing the charging speed of the battery pack and thus improving the performance of the battery pack.

[0085] It should be noted that there are many types of the first conductive material and the second conductive material. The compositions of the first conductive material and the second conductive material are described below with examples.

[0086] In a feasible implementation manner, the first conductive material is copper, and the second conductive material is aluminum.

[0087] In another feasible embodiment, the first conductive material is graphite, and the second conductive material is lithium iron phosphate.

[0088] It is understandable that there is no limitation on the composition of the first conductive material and the second conductive material, and they can be selected according to actual use requirements.

[0089] The first cover plate 101 and the pole 102 provided in the embodiment of the present application are integrally formed, and the pole 102 is extended toward a side away from the first battery 100 .

[0090] It can be understood that the first cover plate 101 and the pole 102 are integrally formed, which can reduce the difficulty of processing the first cover plate 101 and the pole 102, and can improve the connection strength between the first cover plate 101 and the pole 102. The pole 102 extends toward the side away from the first battery 100, which can guide the installation of the connector 300, and has the advantages of easy installation and convenient processing.

[0091] It should be noted that the protrusion can be directly connected to the connector 300 to increase the connection area between the connector 300 and the first cover plate 101, thereby improving the current-carrying capacity of the first cover plate 101. By adaptively increasing the connection area between the connector 300 and the second cover plate 201, the current-carrying capacity of the battery pack can be improved, thereby improving the performance of the battery pack.

[0092] The first cover plate 101 provided in the embodiment of the present application is made of a first conductive material and a second conductive material, and the second cover plate 201 is made of a second conductive material, and the first conductive material and the second conductive material are different.

[0093] It can be understood that the first conductive material and the second conductive material can form a continuous potential difference path to increase the total potential difference of the battery pack, thereby increasing the voltage of the battery pack and improving the performance of the battery pack.

[0094] like Figure 6 As shown, the first cover plate 101 provided in the embodiment of the present application is formed with a third conductive layer 1011 and a fourth conductive layer 1012, and the third conductive layer 1011 and the fourth conductive layer 1012 are connected; the third conductive layer 1011 is located on the side of the fourth conductive layer 1012 away from the connector 300.

[0095] It can be understood that the provision of the third conductive layer 1011 and the fourth conductive layer 1012 can improve the conductivity of the first cover plate 101, thereby increasing the charging speed of the first battery 100 and improving the performance of the battery pack.

[0096] It should be noted that the thickness of the third conductive layer 1011 is 0.5 mm to 3 mm; the thickness of the fourth conductive layer 1012 is 1 mm to 3.5 mm.

[0097] It should be noted that there are multiple different thickness connection modes between the third conductive layer 1011 and the fourth conductive layer 1012 . The thickness connection modes between the third conductive layer 1011 and the fourth conductive layer 1012 are described below with examples.

[0098] In a feasible implementation manner, the thickness of the third conductive layer 1011 is 0.5 mm, and the thickness of the fourth conductive layer 1012 is 3.5 mm.

[0099] In another feasible implementation manner, the thickness of the third conductive layer 1011 is 3 mm, and the thickness of the fourth conductive layer 1012 is 1 mm.

[0100] It is understood that there is no limitation on the thickness connection method between the third conductive layer 1011 and the fourth conductive layer 1012, and it can be selected according to actual use requirements. It should be noted that the different thicknesses of the third conductive layer 1011 and the fourth conductive layer 1012 can improve the conductivity of the first cover plate 101 while improving the connection stability of the first cover plate 101, thereby improving the charging speed and service life of the first battery 100.

[0101] In the embodiment of the present application, the third conductive layer 1011 is made of the same material as the first cover plate 101 , and the fourth conductive layer 1012 is made of the same material as the second cover plate 201 .

[0102] It can be understood that the third conductive layer 1011 and the fourth conductive layer 1012 are made of different materials, and the third conductive layer 1011 and the fourth conductive layer 1012 can cooperate to form a continuous potential difference path to increase the total potential difference of the battery pack, thereby increasing the voltage of the battery pack and improving the performance of the battery pack.

[0103] The connection between the connector 300 and the pole 102 provided in the embodiment of the present application is provided to protrude from the connection surface between the connector 300 and the second cover plate 201 .

[0104] It can be understood that the connector 300 can act as a buffer when the battery pack is vibrated to reduce the stress on the pole 102, thereby extending the service life of the pole 102 and extending the service life of the battery pack; and the connection between the connector 300 and the pole 102 protrudes from the connection surface of the connector 300 and the second cover plate 201, which can guide the operator to guide the installation position of the pole 102 and the connector 300, so as to reduce the difficulty of installation between the pole 102 and the connector 300, thereby improving the installation efficiency of the pole 102 and the connector 300.

[0105] like Figure 7 As shown, the connector 300 provided in an embodiment of the present application includes: a first connecting section 301, a second connecting section 302 and a third connecting section 303 connected in sequence; the first connecting section 301 is connected to the pole 102, the third connecting section 303 is connected to the second cover plate 201, and the first connecting section 301 and the second connecting section 302 are arranged at an angle, and the second connecting section 302 and the third connecting section 303 are arranged at an angle.

[0106] It can be understood that one end of the second connecting segment 302 is connected to the side of the first connecting segment 301 facing away from the pole 102, and the other end of the second connecting segment 302 is connected to the side of the third connecting segment 303 facing away from the second cover plate 201; the second connecting segment 302 is used to connect the first connecting segment 301 and the third connecting segment 303 so that the first connecting segment 301, the second connecting segment 302 and the third connecting segment 303 can be conductively connected.

[0107] It should be noted that the first connecting segment 301 and the second connecting segment 302 are arranged at an angle, which can play a buffering role when the battery pack is subjected to vibration, so as to reduce the occurrence of breakage of the first connecting segment 301 and the second connecting segment 302 due to stress concentration when the first connecting segment 301 and the second connecting segment 302 vibrate, thereby extending the service life of the first connecting segment 301 and the second connecting segment 302, thereby extending the service life of the battery pack.

[0108] It should be noted that the second connecting segment 302 and the third connecting segment 303 are set at an angle, which can play a buffering role when the battery pack is subjected to vibration, so as to reduce the occurrence of breakage of the second connecting segment 302 and the third connecting segment 303 due to stress concentration when the second connecting segment 302 and the third connecting segment 303 vibrate, thereby extending the service life of the second connecting segment 302 and the third connecting segment 303, thereby extending the service life of the battery pack.

[0109] The pole 102 provided in the embodiment of the present application is formed with a first limiting portion, and the first cover plate 101 is formed with a second limiting portion, and the first limiting portion and the second limiting portion are connected; the first limiting portion is located on the side of the second limiting portion away from the first battery 100, and the second limiting portion is used to limit the movement of the first limiting portion toward the side close to the first battery 100.

[0110] It can be understood that the first limiting portion is connected to the second limiting portion, and the second limiting portion can limit the movement of the first limiting portion toward the side close to the first battery 100, so that the first cover 101 can limit the movement of the pole 102 toward the side close to the first battery 100, so as to assist in limiting the installation of the pole 102 and the first cover 101, and can improve the connection strength between the pole 102 and the first cover 101, thereby providing safety protection for the first battery 100.

[0111] It should be noted that the first limiting portion and the second limiting portion can be arranged in a variety of different ways. The following describes the arrangement of the first limiting portion and the second limiting portion with examples in turn.

[0112] In a feasible embodiment, the first limiting portion is the first surface, the second limiting portion is the second surface, the first surface and the second surface are arranged opposite to each other, and the first surface and the second surface can be connected. The second surface is used to support the first surface to limit the movement of the first surface toward the side close to the second surface, thereby limiting the movement of the pole 102 toward the first cover plate 101.

[0113] In another feasible embodiment, the first limiting portion is an extension end, and the second limiting portion is a blind hole; the extension end is provided on the pole 102 and extends toward the side close to the first cover plate 101; the blind hole is provided on the first cover plate 101 and extends toward the side close to the first battery 100; the extension end and the blind hole are provided in coordination, the extension end can move toward the side close to the blind hole and be accommodated inside the blind hole; the blind hole is used to limit the offset of the extension end to limit the offset of the pole 102 relative to the first cover plate 101, thereby improving the connection strength between the first cover plate 101 and the pole 102, thereby providing safety protection for the first battery 100.

[0114] It is understandable that there is no restriction on the specific arrangement of the first limiting portion and the second limiting portion, and they can be selected according to actual use requirements. It is only necessary to ensure that the first limiting portion and the second limiting portion cooperate to limit the offset between the pole 102 and the first cover plate 101.

[0115] It should be noted that when the second limiting portion is a blind hole, the opening of the blind hole is used to accommodate the extension end extending deep into the interior of the blind hole; a first length is formed between the bottom wall of the blind hole and the first cover plate 101, and the first length L satisfies: 0.6mm≤L≤1.2mm.

[0116] It can be understood that the bottom wall of the blind hole can limit the extension end to limit the movement of the second limiting portion toward the side close to the first cover plate 101; the setting of the first length L can improve the connection strength of the first cover plate 101 to increase the service life of the first cover plate 101.

[0117] It should be noted that the poles 102 provided in the embodiments of the present application have a variety of different configuration shapes. The configuration shapes of the poles 102 are described below with examples.

[0118] In a feasible embodiment, the pole 102 is a circular pole 102, which is arranged on the first cover plate 101. The circular pole 102 has the advantage of being easy to process, and the circular pole 102 can reduce the difficulty of connecting with the first cover plate 101, thereby improving the installation efficiency of the first cover plate 101 and the circular pole 102.

[0119] In another feasible embodiment, the pole 102 is a square pole 102, which is arranged on the first cover plate 101, and at least a portion of the square pole 102 is arranged parallel to the first cover plate 101; wherein, increasing the length of the square pole 102 can increase the surface area of ​​the square pole 102, thereby increasing the area of ​​the connection surface between the square pole 102 and the first cover plate 101, and adaptively increasing the area of ​​the connection surface between the connector 300 and the pole 102 and the area of ​​the connection surface between the connector 300 and the second cover plate 201, which can improve the current carrying capacity of the connector 300, thereby increasing the current of the first battery 100 and the second battery 200, thereby improving the performance of the battery.

[0120] In addition, in another feasible embodiment, the connection between the pole 102 and the first cover plate 101 is a circular pole 102, and the side of the pole 102 facing away from the first cover plate 101 is a square pole 102. The circular pole 102 is connected to the square pole 102. The circular pole 102 is used to connect with the first cover plate 101. The circular pole 102 can reduce the difficulty of connecting with the first cover plate 101, thereby improving the installation efficiency of the first cover plate 101 and the circular pole 102; the square pole 102 is used to connect with the first cover plate 101. By connecting the connector 300 and increasing the length of the square pole 102, the surface area of ​​the square pole 102 can be increased, thereby increasing the area of ​​the connection surface between the square pole 102 and the first cover plate 101. By adaptively increasing the area of ​​the connection surface between the connector 300 and the pole 102 and the area of ​​the connection surface between the connector 300 and the second cover plate 201, the current carrying capacity of the connector 300 can be improved, thereby increasing the current of the first battery 100 and the second battery 200, thereby improving the performance of the battery.

[0121] It is understandable that the specific configuration shape of the pole 102 is not limited and can be selected according to actual use requirements, as long as the pole 102 is provided on the first cover 101 .

[0122] It should be noted that the first cover plate 101 has various shapes. The shapes of the first cover plate 101 are described below with examples.

[0123] In a feasible embodiment, the first cover plate 101 is a first circular cover plate, the first battery 100 is a first cylindrical battery, and the first circular cover plate is disposed on the first cylindrical battery.

[0124] It should be noted that, when the first cover plate 101 is a first circular cover plate, the second cover plate 201 is a second circular cover plate, the second battery 200 is a second cylindrical battery, and the second circular cover plate is disposed on the second cylindrical battery.

[0125] It can be understood that the first battery 100 and the second battery 200 are each configured as a cylindrical shape, which has the advantage of convenient connection.

[0126] In another feasible embodiment, the first cover plate 101 is a first square cover plate, the first battery 100 is a square battery, and the first square cover plate is disposed on the first square battery.

[0127] It should be noted that, when the first cover plate 101 is a first square cover plate, the second cover plate 201 is a second square cover plate, the second battery 200 is a second square battery, and the second square cover plate is disposed on the second square battery.

[0128] It can be understood that the first battery 100 and the second battery 200 are respectively configured in a square shape, which has the advantages of occupying a small space and a compact structure.

[0129] It is understandable that there is no limitation on the shape of the first cover 101 , and it can be selected according to actual use requirements, as long as the first cover 101 and the first battery 100 are matched with each other.

[0130] It should be noted that the battery pack provided in the embodiments of the present application also includes: an explosion-proof valve, an explosion-proof valve, and an injection port; wherein, each battery is provided with an explosion-proof valve and an injection port. The explosion-proof valve is used to automatically open and release internal pressure when the internal pressure of the battery increases abnormally, thereby preventing the battery from exploding. The injection port is used to add electrolyte to the interior of the battery casing and prevent the electrolyte from overflowing from the battery pack.

[0131] It can be understood that a first explosion-proof valve is provided on the first battery 100, and the first explosion-proof valve can be installed on the first cover plate 101. One end of the first explosion-proof valve is set toward the side away from the first cover plate 101, and the other end of the first explosion-proof valve extends into the interior of the first battery 100. The first explosion-proof valve can prevent the first battery 100 from exploding, so as to provide safety protection for the first battery 100.

[0132] It can be understood that a first liquid injection hole is provided on the first battery 100, and the first liquid injection hole can be installed on the first cover plate 101. One end of the first liquid injection hole is set toward the side away from the first cover plate 101, and the other end of the first liquid injection hole extends into the interior of the first battery 100. The setting of the first liquid injection hole can facilitate the operator to add electrolyte toward the interior of the first battery 100, and can prevent the electrolyte inside the first battery 100 from overflowing, so as to safely protect the first battery 100.

[0133] It can be understood that a second explosion-proof valve is provided on the second battery 200, and the second explosion-proof valve can be installed on the second cover plate 201. One end of the second explosion-proof valve is set toward the side away from the second cover plate 201, and the other end of the second explosion-proof valve extends into the interior of the second battery 200. The second explosion-proof valve can prevent the second battery 200 from exploding, thereby providing safety protection for the second battery 200.

[0134] It can be understood that a second liquid injection hole is provided on the second battery 200, and the second liquid injection hole can be installed on the second cover plate 201. One end of the second liquid injection hole is set toward the side away from the second cover plate 201, and the other end of the second liquid injection hole extends into the interior of the second battery 200. The setting of the second liquid injection hole can facilitate the operator to add electrolyte toward the interior of the second battery 200, and can prevent the electrolyte inside the second battery 200 from overflowing, so as to safely protect the second battery 200.

[0135] An embodiment of the present application further provides an electrical device, comprising an electrical device and a battery pack as described in any of the above embodiments, wherein the battery pack is used to provide electrical energy to the electrical device.

[0136] The electrical equipment in the embodiments of the present application may be a vehicle. For example, the vehicle may be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Accordingly, the electrical device may be the vehicle's drive mechanism or the vehicle's control system.

[0137] In addition, the electrical equipment may also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecraft, etc., among which the spacecraft may include airplanes, rockets, space shuttles or spacecraft.

[0138] Since the electric device in this embodiment includes the battery pack described in any of the above embodiments, the electric device including the battery pack structure and beneficial effects will not be further described in this embodiment.

[0139] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0140] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: A first battery (100) having a first cover plate (101) and a pole (102) electrically connected to the first cover plate (101); A second battery (200) has a second cover plate (201), wherein the second cover plate (201) is electrically connected to a tab of the second battery (200); a connecting member (300), one end of the connecting member (300) being connected to the pole (102), the other end of the connecting member (300) being connected to the second cover plate (201), and the pole (102) and the second cover plate (201) being electrically connected via the connecting member (300); Wherein, at least a portion of the pole (102) protrudes from the first cover plate (101).

2. A battery pack according to claim 1, characterized in that: The first cover plate (101) and the second cover plate (201) are made of different materials.

3. A battery pack according to claim 2, characterized in that: The pole (102) is formed with a first conductive layer (1021) and a second conductive layer (1022), and the first conductive layer (1021) and the second conductive layer (1022) are connected; The first conductive layer (1021) is located on a side of the second conductive layer (1022) facing away from the connecting member (300).

4. A battery pack according to claim 3, characterized in that: The first conductive layer (1021) is made of the same material as the first cover plate (101), and the second conductive layer (1022) is made of the same material as the second cover plate (201).

5. The battery pack according to claim 2, characterized in that: The first cover plate (101) is made of a first conductive material, the second cover plate (201) is made of a second conductive material, and the first conductive material and the second conductive material are different; The pole (102) is a composite of the first conductive material and the second conductive material.

6. The battery pack according to claim 1, characterized in that: The first cover plate (101) and the pole (102) are integrally formed; The pole (102) is extended toward a side away from the first battery (100).

7. A battery pack according to claim 6, characterized in that: The first cover plate (101) is made of a first conductive material and a second conductive material, the second cover plate (201) is made of the second conductive material, and the first conductive material and the second conductive material are different.

8. A battery pack according to claim 7, characterized in that: The first cover plate (101) is formed with a third conductive layer (1011) and a fourth conductive layer (1012), and the third conductive layer (1011) and the fourth conductive layer (1012) are connected; The third conductive layer (1011) is located on a side of the fourth conductive layer (1012) facing away from the connector (300).

9. The battery pack according to claim 8, characterized in that: The third conductive layer (1011) is made of the same material as the first cover plate (101), and the fourth conductive layer (1012) is made of the same material as the second cover plate (201).

10. The battery pack according to claim 1, characterized in that: The connection point between the connecting member (300) and the pole (102) is protruding from the connection surface between the connecting member (300) and the second cover plate (201).

11. The battery pack according to claim 1, characterized in that: The connecting member (300) comprises: a first connecting section (301), a second connecting section (302) and a third connecting section (303) connected in sequence; the first connecting section (301) is connected to the pole (102), the third connecting section (303) is connected to the second cover plate (201), the first connecting section (301) and the second connecting section (302) are arranged at an angle, and the second connecting section (302) and the third connecting section (303) are arranged at an angle.

12. A battery pack according to any one of claims 1 to 11, characterized in that: The pole (102) is formed with a first limiting portion, the first cover plate (101) is formed with a second limiting portion, and the first limiting portion and the second limiting portion are connected; the first limiting portion is located on a side of the second limiting portion away from the first battery (100), and the second limiting portion is used to limit the movement of the first limiting portion toward a side close to the first battery (100).

13. A battery pack according to any one of claims 1 to 11, characterized in that: The pole (102) is a circular pole, and the circular pole is arranged on the first cover plate (101); And / or, the pole (102) is a square pole, and at least a portion of the square pole is arranged parallel to the first cover plate (101).

14. The battery pack according to claim 8, characterized in that: The thickness of the third conductive layer (1011) is 0.5 mm to 3 mm; The thickness of the fourth conductive layer (1012) is 1 mm to 3.5 mm.

15. An electrical device, characterized in that: The utility model comprises an electric device and the battery pack according to any one of claims 1 to 14, wherein the battery pack is used for providing electric energy to the electric device.

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