CN217444495U - Liquid-cooled battery circuit breaking unit and battery pack - Google Patents

Abstract

The utility model provides a liquid cooling battery unit and battery package that opens circuit. The liquid cooling battery circuit breaking unit comprises an electrical component, an installation box and a heat dissipation box, wherein the installation box is provided with a first containing cavity, the electrical component is arranged in the first containing cavity, the heat dissipation box is provided with a second containing cavity, the installation box is arranged in the second containing cavity, the wall surface of the second containing cavity is in contact with the installation box, the installation box and the heat dissipation box can conduct heat, and the heat dissipation box is further provided with a flow channel for cooling medium to flow. The battery pack comprises the liquid-cooled battery disconnection unit. The utility model discloses in, the radiating effect of the electric part of liquid cooling battery unit of opening circuit is good, and the security of battery package is higher.

Description

Liquid-cooled battery circuit breaking unit and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a liquid cooling battery unit and battery package that opens circuit.

Background

A Battery Disconnect Unit (BDU) is a module in a battery pack. Specifically, a plurality of batteries are arranged in the battery pack, the battery pack supplies power to the electric equipment, and under the condition that the supply current is overlarge, the battery disconnection unit can disconnect the electric connection between the battery pack and the electric equipment, so that the power supply of the battery pack is interrupted, and safety accidents are avoided.

The battery disconnect unit typically includes electrical components such as relays, fuses, and the like, and the battery disconnect unit generates heat due to the current flowing through the battery disconnect unit during operation of the battery disconnect unit. In order to dissipate heat from the battery breaking unit to prevent the battery breaking unit from being damaged, some conventional methods cool the electrical components in the battery breaking unit by liquid cooling. However, some conventional battery disconnection units using liquid cooling for heat dissipation still have poor heat dissipation effect of electrical components.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a liquid cooling battery unit of opening circuit, this liquid cooling battery unit of opening circuit's electrical component's radiating effect is better.

The utility model discloses still provide a battery package including above-mentioned liquid cooling battery unit that opens circuit.

According to the utility model discloses a liquid cooling battery disconnection unit of first aspect embodiment, include: an electrical component for electrically connecting with a battery and for interrupting the power supply of the battery; the mounting box is provided with a first accommodating cavity, and the electric component is arranged in the first accommodating cavity; the heat dissipation box has a second holding cavity, the installation box set up in the second holding cavity, the wall in second holding cavity with the installation box contact, the installation box with the heat dissipation box homoenergetic is heat-conducting, the heat dissipation box still has the runner that supplies cooling medium to flow.

According to the utility model discloses liquid cooling battery disconnection unit has following beneficial effect at least: the heat of the electric component transferred to the heat dissipation box through the installation box can be absorbed by the cooling medium in the flow channel, and the cooling medium absorbing the heat leaves the heat dissipation box and can take away the part of the heat, so that the heat dissipation of the electric component is realized. The utility model provides a liquid cooling battery unit that opens circuit, owing to install electrical component's install box setting in the radiator box, and the wall contact in install box and second holding chamber, area of contact between install box and the radiator box is great, and electrical component's heat can transmit to the radiator box rapidly in, is favorable to improving electrical component's radiating effect like this.

According to the utility model discloses a some embodiments, the heat dissipation case includes: the main body is provided with the second accommodating cavity, and one side of the main body, which is close to the installation box, is provided with an installation groove; the liquid cooling pipe is arranged in the mounting groove, and the flow channel is arranged inside the liquid cooling pipe.

According to some embodiments of the utility model, the heat dissipation case still includes the heat dissipation tooth, the heat dissipation tooth connect in the main part is back to one side of install bin, just the heat dissipation tooth for the main part is towards keeping away from the direction protrusion of install bin.

According to some embodiments of the present invention, the liquid cooling pipe is protruded with respect to the wall surface of the second receiving chamber, so that a part of the liquid cooling pipe is disposed in the second receiving chamber, the liquid cooling pipe is in contact with the installation box.

According to some embodiments of the invention, the installation case comprises: a cover body; the electric component is connected to the seat body, the cover body is connected to the seat body and covers the electric component, the cover body and the seat body jointly define the first accommodating cavity, and the seat body can conduct heat; the heat conducting pad wraps the outer edge of the base body, can conduct heat and is insulated, and one side, back to the base body, of the heat conducting pad is in contact with the heat dissipation box.

According to some embodiments of the invention, the heat conducting pad has elasticity.

According to the utility model discloses a some embodiments, the lid can heat conduction, the heat conduction pad is still wrapped up the outer edge of lid.

According to some embodiments of the utility model, the electric parts is including leading electrical drainage, it sets up to the conductor to lead electrical drainage, the lid has the hole of dodging, it sets up to lead electrical drainage's partly in the hole of dodging.

According to some embodiments of the utility model, the heat dissipation case have with the opening in second holding chamber intercommunication, the lid is insulating, just the lid is provided with the one end of dodging the hole for the heat dissipation case is provided with open-ended one end is kept away from towards the direction protrusion in second holding chamber.

According to the utility model discloses a battery package of second aspect embodiment includes: the liquid-cooled battery disconnect unit of the first aspect embodiment; a plurality of batteries, wherein the batteries are electrically connected with the liquid-cooled battery circuit breaking unit; and the battery and the liquid-cooled battery circuit breaking unit are arranged in the box body.

According to the utility model discloses battery package has following beneficial effect at least: the liquid cooling battery circuit breaking unit has good heat dissipation effect and high safety of the battery pack.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a schematic view of a liquid-cooled battery disconnection unit according to an embodiment of the present invention;

FIG. 2 is an exploded view of the liquid-cooled battery disconnect unit of FIG. 1;

FIG. 3 is an exploded view of the liquid-cooled battery disconnect unit of FIG. 1 in another exploded state;

FIG. 4 is an exploded view of the mounting case and electrical components of FIG. 2 (with the thermal pad omitted);

FIG. 5 is a schematic view of the flow path of a cooling medium flowing inside the liquid cooling pipe shown in FIG. 3;

FIG. 6 is a cross-sectional view of the body of the heat dissipation case of FIG. 3;

fig. 7 is a perspective cross-sectional view of the liquid-cooled battery disconnect unit of fig. 1 (with portions of the electrical components omitted);

fig. 8 is a simplified schematic diagram of a battery pack according to an embodiment of the present invention supplying power to an electric device.

Reference numerals: 100-liquid cooling battery circuit breaking unit, 101-main body, 102-radiating teeth, 103-liquid cooling pipe, 104-heat conducting pad, 105-cover body, 106-conducting bar, 201-installation box, 202-radiating box, 301-avoiding hole, 302-electrical component, 303-base body, 401-fuse, 402-relay, 403-current sensor, 601-bottom plate, 602-side plate, 603-opening, 604-second containing cavity, 605-installation groove, 701-first containing cavity, 702-flow channel, 800-battery pack, 801-electric equipment, 802-battery, 803-box body.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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 thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The utility model provides a liquid cooling battery unit 100 that opens circuit, referring to fig. 1 to 3, this liquid cooling battery unit 100 that opens circuit includes electrical component 302, install bin 201 and heat dissipation case 202.

Referring to fig. 8, both the battery 802 and the electric equipment 801 are electrically connected to the liquid-cooled battery disconnect unit 100, and the electrical component 302 can disconnect the electrical connection between the battery 802 and the electric equipment 801. Referring to fig. 4, the electrical component 302 may include a relay 402, a fuse 401, a current sensor 403, and a conductive bar 106, wherein the relay 402, the fuse 401, and the current sensor 403 are all connected to the conductive bar 106, the conductive bar 106 is configured as a conductor (e.g., configured as a copper bar), and the conductive bar 106 may be used to connect to a conductive component such as a wire. The relay 402 is used for actively disconnecting the battery 802 from the electric equipment 801; when the current is too large, the fuse in the fuse 401 blows, so that the battery 802 is disconnected from the electric equipment 801, and the current sensor 403 is used for detecting the magnitude of the current flowing through the relay 402 or the fuse 401. The circuit connection among the battery 802, the electric equipment 801 and the battery disconnection unit, and the circuit connection among the parts in the electrical component 302 are well known in the art, and are not described in detail herein.

Referring to fig. 3 and 7, the mounting case 201 has a first receiving chamber 701, and the electric component 302 is disposed in the first receiving chamber 701. With reference to fig. 2, 3 and 6, the heat dissipation case 202 has a second receiving cavity 604, and the installation case 201 is disposed in the second receiving cavity 604, wherein a wall surface of the second receiving cavity 604 contacts with the installation case 201. The installation box 201 and the heat dissipation box 202 all can heat conduction, namely, the installation box 201 and the heat dissipation box 202 are made by the heat conduction material, and the heat conduction material specifically can be metal, or plastics, or silica gel (the utility model discloses well silica gel indicates silicon rubber), and the material of installation box 201 and the material of heat dissipation box 202 can be different moreover. Since both the mounting case 201 and the heat dissipation case 202 can conduct heat, heat generated by the electrical component 302 can be transferred to the mounting case 201 and then transferred to the heat dissipation case 202 through the mounting case 201.

The heat dissipation tank 202 has a flow passage 702, and the flow passage 702 is used for flowing a cooling medium, which is liquid, and for cost reduction, in some embodiments, the cooling medium may be water. The heat transferred from the electrical component 302 to the heat dissipation box 202 is absorbed by the cooling medium in the flow channel 702, and the cooling medium with absorbed heat leaving the heat dissipation box 202 carries away the heat, so as to dissipate the heat of the electrical component 302. The utility model provides a liquid cooling battery unit 100 that opens circuit, owing to install the installation box 201 of electrical component 302 and set up in heat dissipation box 202 and the wall contact of installation box 201 and second holding chamber 604, area of contact between installation box 201 and the heat dissipation box 202 is great, and the heat of electrical component 302 can transmit to in heat dissipation box 202 rapidly, is favorable to improving the radiating effect of electrical component 302 like this.

In addition, because runner 702 is arranged in heat dissipation box 202, the utility model discloses a liquid cooling battery unit 100 that opens circuit need not to stretch into the pipe fitting that supplies the cooling medium flow to the gap of electric part 302 (for example the clearance between relay 402 and the fuse 401) to make pipe fitting and electric part 302 contact, can reduce the overall arrangement degree of difficulty and the structure complexity of liquid cooling battery unit 100 that opens circuit like this, still be favorable to reducing the risk that the cooling medium leakage arouses electric part 302 short circuit.

Referring to fig. 2 and 3, in some embodiments, the heat sink box 202 includes a body 101 and a liquid-cooled tube 103. Referring to fig. 6 again, the second accommodating chamber 604 is disposed in the main body 101; specifically, referring to fig. 6, the main body 101 includes a bottom plate 601 and a plurality of side plates 602, wherein the bottom of the side plates 602 is connected to the bottom plate 601, and the bottom plate 601 and the plurality of side plates 602 jointly enclose a second receiving cavity 604. The side of the main body 101 facing the mounting box 201 (or the side near the second receiving cavity 604) has a mounting groove 605. With reference to fig. 6 and 7, the liquid cooling pipe 103 is disposed in the mounting groove 605; more specifically, it may be that the bottom plate 601 and each side plate 602 have a mounting groove 605. Both the side plates 602 and the bottom plate 601 may be in contact with the mounting case 201. Referring to fig. 7, the liquid cooling pipe 103 has a flow passage 702 inside, that is, a lumen of the liquid cooling pipe 103 serves as the flow passage 702, and a cooling medium flows in the liquid cooling pipe 103. Referring to fig. 2 and 5, the dashed arrows in fig. 5 indicate the flow path of the cooling medium, and both ends (inlet end and outlet end) of the liquid-cooled tube 103 may be disposed outside the second receiving chamber 604 so that the liquid-cooled tube 103 is connected to a liquid supply device (not shown). In other embodiments, the flow channel 702 may be directly disposed inside the side plate 602 or the bottom plate 601. For manufacturing the heat dissipation box 202, the combination of the main body 101 and the liquid cooling pipe 103 is relatively lower in process difficulty and beneficial to reducing the cost compared with the case that the flow channel 702 is directly arranged inside the side plate 602 or the bottom plate 601 of the main body 101.

In the case where heat dissipation box 202 includes main body 101 and liquid-cooled tube 103, heat dissipation box 202 is capable of conducting heat, specifically, both main body 101 and liquid-cooled tube 103 are capable of conducting heat. In order to make the liquid cooling pipe 103 have certain strength and better heat conductivity, the liquid cooling pipe 103 may be set as a copper pipe. In other embodiments, it is also contemplated that liquid-cooled tube 103 may be provided as a plastic hose in order to facilitate installation of liquid-cooled tube 103 into mounting slot 605. The body 101 may be made of metal such as aluminum, iron, etc. In addition, the main body 101 may not be integrally formed for the convenience of installing the liquid-cooling pipe 103 into the installation groove 605. For example, after a part of the liquid cooling pipe 103 is embedded in one side plate 602, another part of the liquid cooling pipe 103 is embedded in another side plate 602, and then the two side plates 602 are welded; similarly, a part of liquid-cooling pipe 103 may be inserted into one side plate 602, and then another part of liquid-cooling pipe 103 may be inserted into bottom plate 601, and then both side plates 602 may be welded.

The heat of the heat dissipation case 202 is partly taken away by the cooling medium from the liquid-cooled battery breaking unit 100, and partly absorbed by the air around the heat dissipation case 202. Since the temperature difference between the electrical component 302 and the heat dissipation box 202 affects the heat dissipation efficiency of the electrical component 302, in order to dissipate the heat of the heat dissipation box 202 as quickly as possible to ensure the heat dissipation efficiency of the electrical component 302, referring to fig. 1 and 2, in some embodiments, the heat dissipation box 202 further includes heat dissipation teeth 102. The heat dissipation teeth 102 are connected to a side of the main body 101 opposite to the mounting box 201 (or a side of the main body 101 opposite to the second receiving cavity 604), and the heat dissipation teeth 102 protrude in a direction away from the mounting box 201 relative to the main body 101. The heat dissipation teeth 102 can increase the heat exchange area between the main body 101 and the air surrounding the main body 101, thereby enhancing the heat transfer between the heat dissipation box 202 and the surrounding air and increasing the heat dissipation rate of the heat dissipation box 202. Referring to fig. 1 and 2, in order to further improve the heat dissipation efficiency of the heat dissipation box 202, a plurality of heat dissipation teeth 102 may be provided, and the plurality of heat dissipation teeth 102 are spaced apart from each other. The heat dissipation teeth 102 may be connected to the side plate 602, and the heat dissipation teeth 102 and the side plate 602 may be integrally formed; for example, the heat dissipation teeth 102 and the side plate 602 are both made of aluminum, and the heat dissipation teeth 102 and the side plate 602 are molded together.

With reference to fig. 6 and 7, in some embodiments, a portion of the liquid-cooled tube 103 may also protrude relative to a wall of the second accommodating chamber 604, and a portion of the liquid-cooled tube 103 protrudes into the second accommodating chamber 604. Compared with the case that the liquid cooling pipe 103 is only contacted with the installation box 201 through the main body 101, the part of the liquid cooling pipe 103 arranged in the second accommodating cavity 604 can be contacted with the installation box 201, so that the heat exchange area between the heat dissipation box 202 and the installation box 201 is increased, and the heat dissipation efficiency of the electrical component 302 is improved.

Referring to fig. 2 and 3, in some embodiments, mounting box 201 includes cover 105, base 303, and insulating thermal pad 104. The electrical component 302 is connected to the base 303, the cover 105 is connected to the base 303 and covers the electrical component 302, and the base 303 and the cover 105 together enclose a first receiving cavity 701. The electrical component 302 can be placed in the base 303 only, or can be fixed in the base 303 by screws; it is also possible to bond in the base 303 by an insulating glue, which is filled in the gap between the electrical component 302 and the base 303. A user can mount the electrical component 302 into the mounting box 201 and then mount the electrical component into the heat dissipation box 202, and the liquid-cooled battery circuit breaking unit 100 is convenient to assemble under the condition that the electrical component 302 and the seat 303 are fixed to form a whole. The socket body 303 may be configured to be insulative (e.g., the socket body 303 is made of insulative plastic), the socket body 303 is capable of conducting heat, and heat generated by the electrical component 302 is capable of being transferred into the socket body 303. The heat conducting pad 104 wraps the outer edge of the seat 303, so that the heat conducting pad 104 contacts with the seat 303, and the outer edge of the heat conducting pad 104 contacts with the heat dissipation box 202. The thermal pad 104 may be specifically configured as a silica gel pad, and the material of the thermal pad 104 may also be an insulating material such as plastic or resin. When the main body 101 of the heat dissipation case 202 is made of a metal material, the provision of the insulating heat conduction pad 104 can reduce the risk of short circuit caused by contact between the heat dissipation case 202 and the electrical component 302.

In some embodiments, the thermal pad 104 may also have elasticity to accommodate dimensional errors of the base 303 and the main body 101, so as to prevent the liquid-cooled battery circuit breaking unit 100 from being unable to be assembled due to the dimensional errors of the base 303 and the main body 101. Under the condition that the heat conducting pad 104 is set as a silica gel pad, the heat conducting pad 104 has elasticity and can be insulated; of course, the material of the thermal pad 104 may be provided as other kinds of rubber. Referring to fig. 7, the thermal pad 104 is equivalently clamped between the seat 303 and the main body 101, and when the size of the seat 303 is larger or the size of the main body 101 is smaller (due to machining errors during production), the distance between the main body 101 and the seat 303 is smaller than a design value; because the thermal pad 104 has elasticity, the thermal pad 104 can deform to adapt to the gap between the seat 303 and the main body 101, and at this time, the thermal pad 104 can still be sleeved outside the seat 303, and the installation box 201 is integrally installed in the heat dissipation box 202.

In addition, under the condition that a part of the liquid cooling pipe 103 protrudes relative to the wall surface of the second accommodating cavity 604, the liquid cooling pipe 103 also contacts with the heat conducting pad 104, and the heat conducting pad 104 is an elastic component, so that the squeezing effect on the liquid cooling pipe 103 is favorably reduced, and the risk of liquid leakage caused by damage to the liquid cooling pipe 103 is reduced.

In some embodiments, the cover 105 is also thermally conductive (e.g., the cover 105 is made of a thermally conductive plastic), and the thermal pad 104 is wrapped around the outer edge of the cover 105 such that the thermal pad 104 contacts the cover 105. In this arrangement, the heat absorbed by the cover 105 from the electrical component 302 can also be transferred to the heat dissipation box 202 through the thermal pad 104, thereby enhancing the heat dissipation efficiency of the electrical component 302.

To facilitate electrical connection between the electrical component 302 and the battery 802 (or other device that needs to be connected to the liquid-cooled battery disconnect unit 100), referring to fig. 1-2, in some embodiments, the cover 105 has an escape aperture 301, and a portion of the conductive bar 106 is disposed in the escape aperture 301. In this arrangement, electrical connection between electrical component 302 and battery 802 can be achieved by first guiding the wires to cover 105 and then connecting the wires (or other electrical connection components) to conductive bars 106, and electrical component 302 can be connected to the wires without disassembling liquid-cooled battery disconnect unit 100. In order to improve the safety of the liquid-cooled battery breaking unit 100, the cover 105 may be insulated to prevent the cover 105 from contacting the conductive bar 106 and causing a short circuit. In order to avoid short circuit, if the cover 105 is provided as a conductor, it is necessary to ensure a sufficiently large gap between the hole wall of the avoiding hole 301 and the conductive bar 106.

As mentioned above, the main body 101 of the heat dissipation case 202 may be made of a metal material. In the case where the heat dissipation case 202 is made of a metal material, the heat dissipation case 202 is actually a conductor, and in order to reduce the risk of short circuit to improve the safety of the liquid-cooled battery breaking unit 100, the cover 105 may be provided as insulation, and the cover 105 is protruded to increase the creepage distance between the main body 101 and the conductive bar 106.

Specifically, referring to fig. 6, in some embodiments, the heat dissipation box 202 has an opening 603 communicating with the second receiving cavity 604, and more specifically, the heat dissipation box may be the body 101 having the opening 603 (taking fig. 6 as an example, the opening 603 is located at the top end of the body 101), and the end surface of the end of the body 101 where the opening 603 is located is the portion most easily contacted with the conductive bar 106 by the body 101. With reference to fig. 6 and 7, the cover 105 is insulated, one end of the cover 105, which is provided with the avoiding hole 301, protrudes in a direction away from the second accommodating cavity 604 relative to one end of the heat dissipation box 202, which is provided with the opening 603 (i.e., the end surface of the top end of the main body 101), so that the portion of the conductive bar 106, which is disposed in the avoiding hole 301, protrudes relative to one end of the heat dissipation box 202, which is provided with the opening 603, thereby increasing the creepage distance between the main body 101 and the conductive bar 106. Taking fig. 7 as an example, when the top end of the cover 105 protrudes from the top end of the main body 101, relative to the arrangement mode that the top end of the cover 105 is flush with the top end of the main body 101, the creepage distance between the main body 101 and the conductive bar 106 is larger. In the case that the cover body 105 protrudes from the end of the main body 101 where the opening 603 is formed, the thermal pad 104 may also protrude from the end of the main body 101 where the opening 603 is formed in the direction away from the second accommodating cavity 604, so as to increase the contact heat transfer area between the thermal pad 104 and the cover body 105 and improve the heat dissipation efficiency of the electrical component.

Referring to fig. 8, the present invention further provides a battery pack 800, wherein the battery pack 800 includes a case 803, a battery 802, and the liquid-cooled battery disconnection unit 100 in any of the above embodiments. The battery 802 is provided in plurality, and both the battery 802 and the liquid-cooled battery disconnect unit 100 are mounted inside the case 803. The plurality of batteries 802 may be connected in series (fig. 8 shows an arrangement in which the batteries 802 are connected in series), or may be connected in parallel, and the batteries 802 and the battery 802 disconnecting unit are electrically connected by an electrical connection member such as a wire. The battery 802 may provide power to the powered device 801 and the liquid-cooled battery disconnect unit 100 may disconnect the electrical connection between the battery 802 and the powered device 801 when the supply current is excessive.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims (10)

1. Liquid cooling battery disconnection unit, its characterized in that includes:

an electrical component for electrically connecting with a battery and for interrupting the power supply of the battery;

the mounting box is provided with a first accommodating cavity, and the electric component is arranged in the first accommodating cavity;

the heat dissipation box has a second holding cavity, the installation box set up in the second holding cavity, the wall in second holding cavity with the installation box contact, the installation box with the heat dissipation box homoenergetic is heat-conducting, the heat dissipation box still has the runner that supplies cooling medium to flow.

2. The liquid-cooled battery disconnect unit of claim 1, wherein the heat dissipation case comprises:

the main body is provided with the second accommodating cavity, and one side of the main body, which is close to the installation box, is provided with an installation groove;

the liquid cooling pipe is arranged in the mounting groove, and the flow channel is arranged inside the liquid cooling pipe.

3. The liquid-cooled battery disconnect unit of claim 2, wherein the heat sink case further comprises heat sink teeth coupled to a side of the body opposite the mounting case, the heat sink teeth projecting away from the mounting case relative to the body.

4. The liquid-cooled battery disconnect unit of claim 2, wherein the liquid-cooled tube protrudes relative to a wall of the second receiving cavity such that a portion of the liquid-cooled tube is disposed in the second receiving cavity, the liquid-cooled tube being in contact with the mounting case.

5. The liquid-cooled battery disconnect unit of any one of claims 1-4, wherein the mounting box comprises:

a cover body;

the electric component is connected to the seat body, the cover body is connected to the seat body and covers the electric component, the cover body and the seat body jointly define the first accommodating cavity, and the seat body can conduct heat;

the heat conducting pad wraps the outer edge of the base body, can conduct heat and is insulated, and one side, back to the base body, of the heat conducting pad is in contact with the heat dissipation box.

6. The liquid-cooled battery disconnect unit of claim 5, wherein the thermally conductive pad is resilient.

7. The liquid-cooled battery disconnect unit of claim 5, wherein the cover is thermally conductive, the thermally conductive pad further wrapping an outer edge of the cover.

8. The liquid-cooled battery disconnect unit of claim 5, wherein the electrical component comprises a conductive bar, the conductive bar configured as a conductor, the cover having an avoidance hole, a portion of the conductive bar disposed in the avoidance hole.

9. The liquid-cooled battery disconnect unit of claim 8, wherein the heat sink box has an opening in communication with the second receiving cavity, the cover is insulated, and an end of the cover at which the relief hole is disposed protrudes in a direction away from the second receiving cavity relative to an end of the heat sink box at which the opening is disposed.

10. A battery pack, comprising:

the liquid-cooled battery disconnect unit of any of claims 1-9;

a plurality of batteries, wherein the batteries are electrically connected with the liquid-cooled battery circuit breaking unit;

and the battery and the liquid-cooled battery circuit breaking unit are arranged in the box body.

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