Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery pack and electric equipment. The plurality of single batteries are arranged in the box body; the circuit breaking unit comprises a shell, an electric element, an electric connecting piece and a liquid cooling element; the shell is arranged in the box body, the electrical element is arranged in the shell, the electrical connecting piece and the liquid cooling element both penetrate through the shell, part of the electrical connecting piece and part of the liquid cooling element are arranged in the shell, the electrical connecting piece is electrically connected with the single battery and the electrical element respectively, and a liquid cooling cavity is formed in the liquid cooling element; part of the electric connecting piece penetrates through the liquid cooling cavity and is in sealing connection with the liquid cooling element so as to be in direct heat conduction contact with the cooling liquid. According to the battery pack, rapid liquid cooling heat dissipation of the electric connecting piece is achieved, so that rapid heat dissipation of the electric element is achieved, the overall heat dissipation effect of the circuit breaking unit is improved, the circuit breaking unit meets the charging requirement for increasing the charging multiplying power, and the safety performance of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and electrical equipment. Background Art

[0002] With the rapid development of mobile phones, laptops, electric vehicles, power tools, and other devices, battery packs with high capacity, long cycle life, and high safety performance have been widely used and developed. At the same time, there is an urgent demand for battery packs with larger capacity, longer durability, and higher safety. Safety performance is the core performance of battery packs. Therefore, how to improve the safety performance of battery packs has become a pressing issue. Utility Model Content

[0003] Embodiments of the present application provide a battery pack and an electrical device to improve the safety performance of the battery pack.

[0004] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0005] In one aspect, a battery pack is provided, comprising: a box;

[0006] A plurality of single cells are disposed in the box; and

[0007] The circuit breaker unit includes: a housing, electrical components, electrical connectors and a liquid cooling element;

[0008] The shell is arranged in the box body, the electrical components are arranged in the shell, the electrical connectors and the liquid cooling components are both arranged through the shell, some of the electrical connectors and some of the liquid cooling components are arranged in the shell, the electrical connectors are electrically connected to the single battery and the electrical components respectively, a liquid cooling cavity is opened in the liquid cooling component, the liquid cooling cavity is used to accommodate the coolant, some of the electrical connectors are arranged through the liquid cooling cavity and are sealed with the liquid cooling component so as to be in direct thermal contact with the coolant.

[0009] In addition to or as an alternative to one or more of the features disclosed above, the liquid cooling element includes: a first liquid cooling part and a second liquid cooling part connected to each other, and the first liquid cooling part and the second liquid cooling part enclose a liquid cooling cavity.

[0010] In addition to or as an alternative to one or more of the features disclosed above, the first liquid cooling portion and the second liquid cooling portion are provided separately;

[0011] The first liquid cooling part includes: a first main body part and a first connecting part, wherein the first connecting part is connected to the outer surface of the first main body part;

[0012] The second liquid cooling part includes: a second main body and a second connecting part, wherein the second connecting part is connected to the outer surface of the second main body;

[0013] The second connecting portion is rotatably connected to the first connecting portion to rotatably connect the first liquid cooling portion and the second liquid cooling portion to control the second liquid cooling portion to be close to or away from the first liquid cooling portion.

[0014] In addition to or as an alternative to one or more of the features disclosed above, the first liquid cooling portion further comprises: a first locking portion, disposed on the first main body portion;

[0015] The second liquid cooling part further includes: a second locking part, which is arranged on the second main body part. The second locking part is provided with a locking groove. The first locking part is engaged in the locking groove to lock the first liquid cooling part and the second liquid cooling part.

[0016] In addition to or as an alternative to one or more of the features disclosed above, the battery pack has a first orientation;

[0017] The first liquid cooling section and the second liquid cooling section both extend in the first direction, and the first liquid cooling section is provided with a first avoidance groove on both sides thereof which are opposite to each other in the first direction, and the second liquid cooling section is provided with a second avoidance groove on both sides thereof which are opposite to each other in the first direction, so that the first liquid cooling section and the second liquid cooling section are enclosed to form an avoidance opening.

[0018] Some electrical connectors are arranged through the avoidance opening so as to be arranged through the liquid cooling cavity.

[0019] In addition to or as an alternative to one or more of the features disclosed above, the first liquid cooling portion and the second liquid cooling portion are integrally formed.

[0020] In addition to or as an alternative to one or more of the features disclosed above, the battery pack has a first orientation;

[0021] The liquid cooling element extends along the first direction, and has avoidance openings on both sides of the liquid cooling element that are opposite to each other in the first direction, the avoidance openings being connected to the liquid cooling cavity; some electrical connectors are passed through the avoidance openings to pass through the liquid cooling cavity.

[0022] In addition to or as an alternative to one or more of the features disclosed above, the circuit breaker unit further comprises: a first seal and a second seal;

[0023] The first sealing member is arranged between the first liquid cooling part and the electrical connector, and the second sealing member is arranged between the second liquid cooling part and the electrical connector.

[0024] In addition to or as an alternative to one or more of the features disclosed above, a plurality of liquid cooling elements are provided, and each electrical connector is respectively provided through the liquid cooling cavity of a corresponding liquid cooling element.

[0025] In addition to or as an alternative to one or more of the features disclosed above, the first liquid cooling portion is provided with a liquid inlet and a liquid outlet, both of which are in communication with the liquid cooling cavity;

[0026] The circuit breaker unit further includes: a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe is connected to the liquid inlet, and the liquid outlet pipe is connected to the liquid outlet;

[0027] The coolant enters the liquid cooling chamber through the liquid inlet pipe and the liquid inlet port, and is then discharged through the liquid outlet port and the liquid outlet pipe.

[0028] In addition to or as an alternative to one or more features disclosed above, the electrical component is at least one of a relay, a fuse, a resistor, a Hall sensor, and a shunt.

[0029] On the other hand, an electric device is further disclosed. In addition to or as an alternative to one or more of the features disclosed above, the electric device includes a battery pack as described in any one of the above items, and the battery pack serves as a power supply for the electric device.

[0030] One of the above technical solutions has the following advantages or beneficial effects: the present application achieves rapid liquid cooling and heat dissipation of the electrical connectors by passing some electrical connectors through the liquid cooling cavity so that the electrical connectors are in direct thermal contact with the coolant, thereby achieving rapid heat dissipation of the electrical components, improving the overall heat dissipation effect of the circuit breaker unit, enabling the circuit breaker unit to meet the charging requirements of increased charging rates, reducing the contact internal resistance between the electrical components and the electrical connectors, avoiding excessive temperature of the circuit breaker unit that affects the safety of the battery pack, and improving the safety performance of the battery pack; at the same time, extending the service life of the electrical components, reducing the selection requirements of the electrical components, and while ensuring the normal use of the electrical connectors, reducing the cross-sectional area of ​​the electrical connectors, that is, reducing the size of the electrical connectors, and reasonably designing the structural dimensions of the electrical connectors to reduce the production cost of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0032] Figure 1 is an exploded structural view of a battery pack provided according to an embodiment of the present application;

[0033] Figure 2 is an exploded structural view of a circuit breaker unit provided according to an embodiment of the present application;

[0034] Figure 3 This is a top view of the circuit breaker unit according to an embodiment of the present application after the second housing portion is hidden;

[0035] Figure 4 is a cross-sectional view of a circuit breaker unit along the AA direction according to an embodiment of the present application;

[0036] Figure 5is a three-dimensional structural view of a liquid cooling element in a locked state according to an embodiment of the present application;

[0037] Figure 6 is a three-dimensional structural view of a liquid cooling element in an unlocked state according to an embodiment of the present application;

[0038] Figure 7 is an exploded structural view of a circuit breaker unit provided according to another embodiment of the present application;

[0039] Figure 8 It is a structural schematic diagram of a liquid cooling element provided according to another embodiment of the present application.

[0040] Description of reference numerals:

[0041] 100. Battery pack;

[0042] 110, box body;

[0043] 120, single cell battery;

[0044] 130. Circuit breaker unit; 131. Housing; 1311. First housing portion; 1312. Second housing portion; 132. Electrical component; 133. Electrical connector; 134. Liquid-cooling element; 1341. First liquid-cooling portion; 13411. First main body portion; 13412. First connecting portion; 13413. First locking portion; 13414. Liquid inlet; 13415. Liquid outlet; 1342. Second liquid-cooling portion; 13421. Second main body portion; 13422. Second connecting portion; 13423. Second locking portion; 13424. Locking groove; 1343. Liquid-cooling chamber; 1344. Avoidance opening; 13441. First avoidance groove; 13442. Second avoidance groove; 135. First sealing member; 136. Second sealing member; 137. Liquid inlet pipe; 138. Liquid outlet pipe;

[0045] 140. Box lid. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and beneficial effects of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for the purpose of explaining this application and are not intended to limit this application.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] The battery disconnect unit (BDU) is one of the core components of the battery pack, and the battery disconnect unit plays a vital role in the safety of the battery pack; due to the increasing demand for fast charging rates, the current flowing through the battery disconnect unit during fast charging is getting larger and larger. The battery disconnect unit flows through a large current for a long time, resulting in a large amount of heat generated at the contact points of the relays, fuses, and shunts in the battery disconnect unit and the conductive bar, which leads to an increase in the contact internal resistance. The increase in internal resistance leads to a further increase in heat generation, forming a vicious circle. The heat dissipation method of the conductive bar in the existing battery pack disconnect unit is natural cooling or indirect contact between the conductive bar and the coolant. The heat dissipation efficiency of the above heat dissipation method is low, which affects the service life of electrical components such as relays and fuses, and at the same time affects the safety of the battery pack, posing a major safety hazard.

[0051] In order to solve the above problems, in the embodiments of the present application, referring to Figures 1 to 8 The present application provides a battery pack 100 having a first direction X, a second direction Y, and a third direction Z that intersect each other. Exemplarily, the battery pack 100 has the first direction X, the second direction Y, and the third direction Z that are perpendicular to each other. "Perpendicular" refers to a state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°.

[0052] Specifically, the battery pack 100 includes a box body 110 , single cells 120 , a circuit breaker unit 130 and a box cover 140 .

[0053] A plurality of single cells 120 are provided, and the plurality of single cells 120 are all disposed in the box 110 . The plurality of single cells 120 are sequentially arranged in a first direction X to form a battery pack, and the plurality of battery packs are sequentially arranged in a second direction Y.

[0054] The circuit breaker unit 130 includes a housing 131, electrical components 132, electrical connectors 133, and a liquid-cooling element 134. The housing 131 is disposed within the housing 110, and the electrical components 132 are disposed within the housing 131. The electrical connectors 133 and the liquid-cooling element 134 are both disposed within the housing 131. Part of the electrical connectors 133 and part of the liquid-cooling element 134 are disposed within the housing 131. The electrical connectors 133 are electrically connected to the battery cells 120 and the electrical components 132 and 133, respectively. A liquid-cooling cavity 1343 is defined within the liquid-cooling element 134 for accommodating a coolant. Part of the electrical connectors 133 are disposed within the liquid-cooling cavity 1343 and are sealedly connected to the liquid-cooling element 134 for direct thermal contact with the coolant.

[0055] It should be noted that the electrical connector 133 can be an integral part or a separate part.

[0056] The battery pack 100 may comprise three layers: cells 120, battery modules, and battery packs. Specifically, the cells 120 are grouped into battery modules, which are then placed within the housing 110 to form the battery pack. Alternatively, the battery pack 100 may comprise two layers: cells 120 and battery packs. Specifically, the cells 120 are placed within the housing 110 to form the battery pack. This is not a specific limitation in this application and may be configured based on actual circumstances, as long as it does not affect the effectiveness of this application.

[0057] The box body 110 is made of ordinary steel or aluminum, but is not limited thereto.

[0058] The single cell 120 may be a secondary battery, which refers to a single cell that can be recharged to activate the active material after discharge and continue to be used. For example, the single cell 120 may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, or a nickel-cadmium battery, but is not limited thereto.

[0059] The single battery 120 may be a cylindrical battery, a prismatic battery, a soft-pack battery, or a battery of other shapes.

[0060] The single cell 120 may include a shell, an electrode assembly, an electrolyte, an end cap, a pole and other functional components. The electrolyte may be a conventional electrolyte or a special electrolyte with additives added, and the electrolyte is used to soak the electrode assembly. Among them, the electrode assembly is the component where the electrochemical reaction occurs in the single cell 120, and there may be one or more electrode assemblies. The electrode assembly is mainly formed by stacking or winding a positive electrode sheet, a separator and a negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active substances constitute the electrode body, and the parts of the positive electrode sheet and the negative electrode sheet without active substances each constitute a tab. During the charge and discharge process of the single cell 120, the positive electrode active substance and the negative electrode active substance react with the electrolyte, and the tab is electrically connected to the pole to form a current loop, so that the single cell 120 can be used normally.

[0061] The housing 131 is made of plastic material, but is not limited thereto.

[0062] The electrical element 132 is at least one of a relay, a fuse, a resistor, a Hall sensor, and a shunt.

[0063] The electrical connector 133 may be a copper busbar, an aluminum busbar, a copper-aluminum busbar, a wiring harness, or other connectors, but is not limited thereto.

[0064] The liquid cooling element 134 is made of insulating material. For example, the liquid cooling element 134 may be made of plastic material, but is not limited thereto.

[0065] The coolant is made of, but not limited to, insulating material.

[0066] It is understandable that the heat dissipation method of the conductive bar in the existing battery pack circuit breaker unit is natural cooling or indirect contact between the conductive bar and the coolant. The heat dissipation efficiency of the above heat dissipation method is low. When a large current flows through the battery pack circuit breaker unit for a long time, the contacts of the relay, fuse, and shunt in the battery pack circuit breaker unit and the conductive bar generate a lot of heat, thereby increasing the contact internal resistance. The increased internal resistance further increases the heat generation, thereby affecting the service life of electrical components such as relays and fuses, affecting the safety of the battery pack, and posing a major safety hazard; secondly, if the heat dissipation efficiency of the battery pack circuit breaker unit is low, when the thickness of the electrical connector 133 is relatively thin, it is easy to melt, affecting the normal use of the battery pack 100. When the thickness of the electrical connector 133 is relatively thick, although it is not easy to melt, the thicker electrical connector 133 increases the cost; at the same time, the outer surface of the existing conductive bar is covered with an insulating skin, so that the conductive bar and the coolant are cooled through the insulating skin, liquid cooling pipe and other media, affecting the liquid cooling heat dissipation effect of the coolant.

[0067] The present application achieves rapid liquid cooling and heat dissipation of the electrical connector 133 by passing part of the electrical connector 133 through the liquid cooling cavity 1343 so that the electrical connector 133 is in direct thermal contact with the coolant, thereby achieving rapid heat dissipation of the electrical component 132 and improving the overall heat dissipation effect of the circuit breaker unit 130, so that the circuit breaker unit 130 can meet the charging requirements of the increased charging rate, reduce the contact internal resistance between the electrical component 132 and the electrical connector 133, avoid the circuit breaker unit 130 from overheating and thus affecting the safety of the battery pack, and improve the safety performance of the battery pack; at the same time, extend the service life of the electrical component 132, reduce the selection requirements of the electrical component 132, and while ensuring the normal use of the electrical connector 133, reduce the cross-sectional area of ​​the electrical connector 133, that is, reduce the size of the electrical connector 133, and reasonably design the structural size of the electrical connector 133 to reduce the production cost of the battery pack 100.

[0068] At the same time, in this application, by making both the liquid cooling element 134 and the coolant using insulating materials, there is no need to provide an insulating skin on the outer surface of the electrical connector 133. While achieving electrical isolation between the components in the circuit breaker unit 130, the rapid liquid cooling and heat dissipation effect of the electrical connector 133 is further improved, and the overall heat dissipation effect of the circuit breaker unit 130 is further improved.

[0069] In one embodiment, referring to Figure 2The housing 131 includes a first housing portion 1311 and a second housing portion 1312, which are connected to each other. The first housing portion 1311 and the second housing portion 1312 are detachably connected. For example, the first housing portion 1311 and the second housing portion 1312 are detachably connected by a snap-fit ​​or screw-fit connection, but are not limited thereto. The first housing portion 1311 and the second housing portion 1312 enclose a housing cavity for accommodating the electrical components 132, a portion of the electrical connector 133, and a portion of the liquid cooling component 134.

[0070] In one embodiment, in the present application, the structural dimensions of the liquid cooling element 134 can be designed accordingly based on the electrical clearance and creepage distance requirements that need to be met by different battery packs 100 and the length and shape of the conductive bar, covering the position where the electrical connector 133 needs to be insulated, so as to meet the safety design of different battery packs 100 and have universality.

[0071] In one embodiment, referring to Figures 3 and 4 The liquid cooling element 134 includes a first liquid cooling portion 1341 and a second liquid cooling portion 1342 connected to each other. The first liquid cooling portion 1341 and the second liquid cooling portion 1342 enclose a liquid cooling chamber 1343 .

[0072] The first liquid cooling part 1341 and the second liquid cooling part 1342 can be separately provided or integrally formed.

[0073] In one embodiment, referring to Figures 3 to 6 The first liquid cooling part 1341 and the second liquid cooling part 1342 are separately provided to facilitate the assembly of the circuit breaker unit 130 , thereby facilitating the overall assembly of the battery pack 100 and improving the assembly efficiency of the battery pack 100 .

[0074] Specifically, the first liquid cooling part 1341 includes a first main body part 13411 and a first connecting part 13412 . The first connecting part 13412 is connected to the outer surface of the first main body part 13411 .

[0075] The first main body 13411 and the first connecting portion 13412 can be integrally formed. For example, the first main body 13411 and the first connecting portion 13412 are integrally injection molded. The first main body 13411 and the first connecting portion 13412 can also be provided separately from the first connecting portion 13412, and the two are fixedly connected. For example, the first connecting portion 13412 is fixedly connected to the first main body 13411 by a process such as snap-fitting or gluing. This is not specifically limited in this application and can be specifically configured according to actual circumstances. For example, in this application, the first main body 13411 and the first connecting portion 13412 are integrally formed.

[0076] The second liquid cooling portion 1342 includes a second main body portion 13421 and a second connecting portion 13422 . The second connecting portion 13422 is connected to an outer surface of the second main body portion 13421 .

[0077] The second main body 13421 and the second connecting portion 13422 can be integrally formed. For example, the second main body 13421 and the second connecting portion 13422 are integrally injection molded. The second main body 13421 and the second connecting portion 13422 can also be provided separately and fixedly connected. For example, the second connecting portion 13422 is fixedly connected to the second main body 13421 via a process such as snap-fitting or gluing. This is not specifically limited in this application and can be specifically configured according to actual circumstances. For example, in this application, the second main body 13421 and the second connecting portion 13422 are integrally formed.

[0078] The second connection portion 13422 is rotatably connected to the first connection portion 13412 to rotatably connect the first liquid cooling portion 1341 and the second liquid cooling portion 1342 to control the second liquid cooling portion 1342 to approach or move away from the first liquid cooling portion 1341 .

[0079] It can be understood that the first liquid cooling part 1341 and the second liquid cooling part 1342 have two states: connected and separated. When the electrical connector 133 is inserted into the liquid cooling chamber 1343, the staff can control the second liquid cooling part 1342 to rotate in the direction close to the first liquid cooling part 1341, so that the first liquid cooling part 1341 and the second liquid cooling part 1342 cooperate with each other to fix the electrical connector 133 and quickly dissipate heat and cool the electrical connector 133.

[0080] When the electrical connector 133 needs to be disassembled, the staff can control the second liquid cooling part 1342 to rotate in a direction away from the first liquid cooling part 1341, so that the first liquid cooling part 1341 and the second liquid cooling part 1342 are in a separated state. The staff can remove the electrical connector 133 from the separation between the first liquid cooling part 1341 and the second liquid cooling part 1342, thereby realizing the disassembly and separation between the electrical connector 133 and the liquid cooling element 134.

[0081] In one embodiment, referring to Figures 3 to 6 The first liquid cooling part 1341 further includes: a first locking part 13413 , and the first locking part 13413 is arranged on the first main body part 13411 .

[0082] The first main body 13411 and the first locking portion 13413 can be integrally formed. For example, the first main body 13411 and the first locking portion 13413 are integrally injection molded. The first main body 13411 and the first locking portion 13413 can also be provided separately from the first locking portion 13413, and the two are fixedly connected. For example, the first locking portion 13413 is fixedly connected to the first main body 13411 by a process such as snap-fitting or gluing. This is not specifically limited in this application and can be specifically configured according to actual circumstances. For example, in this application, the first main body 13411 and the first locking portion 13413 are integrally formed.

[0083] The second liquid cooling part 1342 further includes: a second locking part 13423, which is arranged on the second main body part 13421, and a locking groove 13424 is defined on the second locking part 13423, and the first locking part 13413 is engaged in the locking groove 13424 to lock the first liquid cooling part 1341 and the second liquid cooling part 1342.

[0084] The second main body 13421 and the second locking portion 13423 can be integrally formed. For example, the second main body 13421 and the second locking portion 13423 are integrally injection molded. The second main body 13421 and the second locking portion 13423 can also be provided separately and fixedly connected. For example, the second locking portion 13423 is fixedly connected to the second main body 13421 via a process such as snap-fitting or gluing. This is not specifically limited in this application and can be specifically configured according to actual circumstances. For example, in this application, the second main body 13421 and the second locking portion 13423 are integrally formed.

[0085] It can be understood that the present application locks the first liquid cooling part 1341 and the second liquid cooling part 1342 through the first locking part 13413 and the locking groove 13424 to ensure that the first liquid cooling part 1341 and the second liquid cooling part 1342 cooperate to fix the electrical connector 133, while ensuring the sealing of the liquid cooling cavity 1343 formed by the first liquid cooling part 1341 and the second liquid cooling part 1342, ensuring that the coolant in the liquid cooling element 134 can quickly liquid-cool the electrical connector 133, and preventing the coolant in the liquid cooling element 134 from overflowing and causing damage to other components, thereby ensuring the normal use of the battery pack 100.

[0086] In one embodiment, referring to Figures 3 to 6The first liquid cooling portion 1341 and the second liquid cooling portion 1342 both extend along the first direction X. First avoidance grooves 13441 are defined on opposite sides of the first liquid cooling portion 1341 in the first direction X. Second avoidance grooves 13442 are defined on opposite sides of the second liquid cooling portion 1342 in the first direction X. The first liquid cooling portion 1341 and the second liquid cooling portion 1342 enclose the first avoidance grooves 13441 and the second avoidance grooves 13442 to form a avoidance opening 1344. Part of the electrical connector 133 is disposed through the avoidance opening 1344 to penetrate the liquid cooling cavity 1343.

[0087] In the present application, by setting up an avoidance opening 1344, part of the electrical connector 133 can be passed through the avoidance opening 1344 to pass through the liquid cooling cavity 1343, so as to facilitate the assembly connection between the electrical connector 133 and the liquid cooling element 134, thereby improving the assembly efficiency between the two and ultimately improving the assembly efficiency of the battery pack 100.

[0088] In another embodiment, referring to Figures 7 and 8 The first liquid cooling part 1341 and the second liquid cooling part 1342 are integrally formed. For example, the first liquid cooling part 1341 and the second liquid cooling part 1342 are integrally injection molded, thereby facilitating processing and reducing processing steps.

[0089] In one embodiment, referring to Figures 7 and 8 The liquid-cooling element 134 extends along the first direction X, and has escape openings 1344 on two opposite sides of the liquid-cooling element 134 in the first direction X. The escape openings 1344 communicate with the liquid-cooling cavity 1343; a portion of the electrical connector 133 is disposed through the escape openings 1344 to be disposed in the liquid-cooling cavity 1343. By providing the escape openings 1344, the present application allows a portion of the electrical connector 133 to be disposed in the liquid-cooling cavity 1343 by being disposed through the escape openings 1344. This facilitates the assembly connection between the electrical connector 133 and the liquid-cooling element 134, thereby improving the assembly efficiency between the two, and ultimately improving the assembly efficiency of the battery pack 100.

[0090] In one embodiment, referring to Figures 5 to 8 The circuit breaker unit 130 further includes: a first seal 135 and a second seal 136 ; the first seal 135 is disposed between the first liquid cooling portion 1341 and the electrical connector 133 , and the second seal 136 is disposed between the second liquid cooling portion 1342 and the electrical connector 133 .

[0091] The first sealing member 135 and the second sealing member 136 can both be made of silicone rubber and use single-sided adhesive to adhere the first sealing member 135 to the first liquid cooling portion 1341 and the second sealing member 136 to the second liquid cooling portion 1342 .

[0092] In the present application, a first seal 135 is provided between the first liquid cooling part 1341 and the electrical connector 133 to achieve sealing between the first liquid cooling part 1341 and the electrical connector 133, and a second seal 136 is provided between the second liquid cooling part 1342 and the electrical connector 133 to achieve sealing between the second liquid cooling part 1342 and the electrical connector 133, thereby preventing the coolant in the liquid cooling element 134 from flowing out of the liquid cooling cavity 1343, thereby ensuring the liquid cooling and heat dissipation effect of the liquid cooling element 134, and at the same time preventing the coolant in the liquid cooling element 134 from overflowing and causing damage to other components, thereby ensuring the normal use of the battery pack 100.

[0093] In one embodiment, referring to Figure 2 The liquid cooling elements 134 are provided with a plurality of them, and each electrical connector 133 is respectively provided through the liquid cooling cavity 1343 of a corresponding liquid cooling element 134. The present application provides multiple liquid cooling elements 134 to quickly cool a corresponding electrical connector 133, further improving the overall heat dissipation effect of the circuit breaker unit 130, enabling the circuit breaker unit 130 to meet the charging requirements of increased charging rates, reducing the contact internal resistance between the electrical element 132 and the electrical connector 133, preventing the circuit breaker unit 130 from overheating and thus affecting the safety of the battery pack, thereby improving the safety performance of the battery pack.

[0094] In one embodiment, referring to Figures 3 to 6 A liquid inlet 13414 and a liquid outlet 13415 are defined on the first liquid cooling portion 1341 , and both the liquid inlet 13414 and the liquid outlet 13415 are in communication with the liquid cooling chamber 1343 .

[0095] Specifically, the circuit breaker unit 130 also includes: a liquid inlet pipe 137 and a liquid outlet pipe 138, the liquid inlet pipe 137 is connected to the liquid inlet 13414, and the liquid outlet pipe 138 is connected to the liquid outlet 13415; the coolant enters the liquid cooling chamber 1343 through the liquid inlet pipe 137 and the liquid inlet 13414, and is then discharged through the liquid outlet 13415 and the liquid outlet pipe 138.

[0096] Among them, the liquid inlet pipe 137 and the liquid outlet pipe 138 can be connected to the liquid cooling system in the battery pack 100, or can be directly connected to the external equipment of the battery pack 100. There is no specific limitation in this application and it can be selected according to the actual situation.

[0097] The present application provides a liquid inlet pipe 137 and a liquid outlet pipe 138 to achieve synchronous control of the coolant in multiple liquid cooling elements 134, thereby improving the cooling control efficiency of the battery pack 100.

[0098] On the other hand, in an embodiment of the present application, the present application further provides an electric device, including the battery pack 100 as described in any of the above embodiments, and the battery pack 100 serves as a power supply for the electric device.

[0099] Among them, electrical equipment can be but is not limited to mobile devices (such as mobile phones, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc.

[0100] The above steps are merely provided to help understand the method, structure, and core concept of the present application. A person skilled in the art may make several improvements and modifications to the present application without departing from the principles of the present application, and such improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A battery pack, characterized in that: include: Box; A plurality of single cells are arranged in the box; as well as A circuit breaker unit, comprising: a housing, electrical components, electrical connectors, and a liquid cooling element; The shell is arranged in the box body, the electrical component is arranged in the shell, the electrical connector and the liquid cooling component are both arranged in the shell, part of the electrical connector and part of the liquid cooling component are arranged in the shell, the electrical connector is electrically connected to the single battery and the electrical component respectively, a liquid cooling cavity is defined in the liquid cooling component, the liquid cooling cavity is used to accommodate cooling liquid, part of the electrical connector is arranged in the liquid cooling cavity and is sealed and connected to the liquid cooling component so as to be in direct thermal contact with the cooling liquid.

2. The battery pack according to claim 1, wherein: The liquid cooling element includes a first liquid cooling part and a second liquid cooling part connected to each other, wherein the first liquid cooling part and the second liquid cooling part enclose the liquid cooling cavity.

3. The battery pack according to claim 2, wherein: The first liquid cooling part and the second liquid cooling part are separately provided; The first liquid cooling part includes: a first main body and a first connecting part, wherein the first connecting part is connected to the outer surface of the first main body; The second liquid cooling part includes: a second main body and a second connecting part, wherein the second connecting part is connected to the outer surface of the second main body; The second connecting portion is rotatably connected to the first connecting portion to rotatably connect the first liquid cooling portion and the second liquid cooling portion to control the second liquid cooling portion to approach or move away from the first liquid cooling portion.

4. The battery pack according to claim 3, wherein: The first liquid cooling part further includes: a first locking part, provided on the first main body; The second liquid cooling part further includes: a second locking part, which is provided on the second main body part. The second locking part is provided with a locking groove. The first locking part is engaged in the locking groove to lock the first liquid cooling part and the second liquid cooling part.

5. The battery pack according to claim 3, wherein: The battery pack has a first orientation; The first liquid cooling part and the second liquid cooling part both extend along the first direction, first avoidance grooves are formed on two opposite sides of the first liquid cooling part, and second avoidance grooves are formed on two opposite sides of the first liquid cooling part, and the first liquid cooling part and the second liquid cooling part are enclosed to form an avoidance opening; Part of the electrical connectors is passed through the avoidance opening so as to pass through the liquid cooling cavity.

6. The battery pack according to claim 2, wherein: The first liquid cooling part and the second liquid cooling part are integrally formed.

7. The battery pack according to claim 6, wherein: The battery pack has a first orientation; The liquid cooling element extends along the first direction, and is provided with avoidance openings on two sides of the liquid cooling element that are opposite to each other in the first direction, the avoidance openings being connected to the liquid cooling cavity; part of the electrical connectors is passed through the avoidance openings to pass through the liquid cooling cavity.

8. The battery pack according to any one of claims 2 to 7, wherein: The circuit breaker unit further includes: a first sealing member and a second sealing member; The first sealing member is disposed between the first liquid cooling portion and the electrical connector, and the second sealing member is disposed between the second liquid cooling portion and the electrical connector.

9. The battery pack according to any one of claims 1 to 7, wherein: There are multiple liquid cooling elements, and each of the electrical connectors is respectively arranged to pass through the liquid cooling cavity of a corresponding liquid cooling element.

10. The battery pack according to claim 2, wherein: The first liquid cooling part is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both connected to the liquid cooling cavity; The circuit breaker unit further includes: a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe is connected to the liquid inlet, and the liquid outlet pipe is connected to the liquid outlet; The cooling liquid enters the liquid cooling chamber through the liquid inlet pipe and the liquid inlet, and is then discharged through the liquid outlet and the liquid outlet pipe.

11. The battery pack according to claim 1, wherein: The electrical component is at least one of a relay, a fuse, a resistor, a Hall sensor, and a shunt.

12. An electrical device, characterized in that: The battery pack comprises the battery pack according to any one of claims 1 to 11, wherein the battery pack serves as a power supply for the electrical device.

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