Distribution box, battery pack and vehicle

Abstract

The utility model discloses a distribution box, a battery pack and a vehicle. The distribution box comprises a box body; the anode loop is arranged in the box body and comprises a first conductive connecting piece and a second conductive connecting piece; the negative electrode loop is arranged in the box body and comprises a third conductive connecting piece and a fourth conductive connecting piece; a first positive terminal of the circuit breaker is connected with one end of the first conductive connecting piece, a second positive terminal of the circuit breaker is connected with one end of the second conductive connecting piece, a first negative terminal of the circuit breaker is connected with one end of the third conductive connecting piece, and a second negative terminal of the circuit breaker is connected with one end of the fourth conductive connecting piece; and the heat dissipation device is arranged at the heat dissipation opening of the box body. According to the distribution box provided by the utility model, by using the circuit breaker, the number of components in the distribution box is reduced, and the manufacturing cost is reduced; by using the heat dissipation device, heat dissipation of components in the distribution box can be accelerated through the heat dissipation openings, and the service life of the components is prolonged.

Description

Technical Field

[0001] The present application relates to the field of batteries, and more specifically to a distribution box, a battery pack and a vehicle. Background Art

[0002] The distribution box in the battery pack arranges multiple high-voltage components in a plastic shell, and uses metal conductors to connect the high-voltage components to form a loop. With the user's demand for long-range and high-power electric vehicles, the voltage and current in the high-voltage circuit of the distribution box continue to increase, resulting in the need to use larger-sized high-voltage components. However, the space in the distribution box is small, which is not conducive to heat dissipation. The heat generated by the operation of components such as relays and fuses in the related technology can only be dissipated through the heat dissipation holes on the outer shell of the distribution box. This method has low heat dissipation efficiency and is prone to overheating of the device, which reduces the service life of the high-voltage components. Utility Model Content

[0003] The utility model is proposed to solve at least one of the above problems. According to the first aspect of the present application, a distribution box is provided, the distribution box comprising: a box body; a positive circuit, arranged in the box body, the positive circuit comprising a first conductive connector and a second conductive connector; a negative circuit, arranged in the box body, the negative circuit comprising a third conductive connector and a fourth conductive connector; a circuit breaker, the first positive terminal of the circuit breaker is connected to one end of the first conductive connector, the second positive terminal of the circuit breaker is connected to one end of the second conductive connector, the first negative terminal of the circuit breaker is connected to one end of the third conductive connector, and the second negative terminal of the circuit breaker is connected to one end of the fourth conductive connector; a heat dissipation device, arranged at the heat dissipation port of the box body; wherein the heat dissipation port is provided on one side of the box body corresponding to the connection position of the circuit breaker with the positive circuit and the negative circuit.

[0004] In one embodiment of the present application, the heat dissipation device includes: a first thermally conductive adhesive and a heat dissipation module; the first side of the first thermally conductive adhesive is thermally connected to the first conductive connector, the second conductive connector, the third conductive connector and the fourth conductive connector respectively, and the second side of the first thermally conductive adhesive is thermally connected to the heat dissipation module.

[0005] In one embodiment of the present application, the heat dissipation module includes: a semiconductor refrigeration sheet and a heat sink; the second side of the first thermally conductive adhesive is thermally connected to the first side of the semiconductor refrigeration sheet, and the second side of the semiconductor refrigeration sheet is thermally connected to the heat sink.

[0006] In one embodiment of the present application, the heat dissipation module further includes: a second thermally conductive adhesive, wherein the second thermally conductive adhesive is fixed between the semiconductor refrigeration sheet and the heat dissipation sheet.

[0007] In one embodiment of the present application, the distribution box also includes: a temperature sensor, which is arranged on the surface of the first conductive connector and is configured to collect the temperature of the first conductive connector; a battery management system, which is respectively connected to the temperature sensor and the semiconductor refrigeration chip and is configured to control the on and off of the current in the semiconductor refrigeration chip according to the collection result of the temperature sensor.

[0008] In one embodiment of the present application, the semiconductor refrigeration sheet and the heat sink are fixed to the outside of the box body by bolts.

[0009] In one embodiment of the present application, the heat dissipation module is one of a liquid cooling plate and a phase change material.

[0010] In one embodiment of the present application, the first conductive connection member, the second conductive connection member, the third conductive connection member and the fourth conductive connection member are copper busbars.

[0011] In one embodiment of the present application, the first conductive connector includes a first lead-out copper bar and a first connecting copper bar, the first lead-out copper bar, the first connecting copper bar and the first positive terminal of the circuit breaker are connected in sequence, the first lead-out copper bar partially extends to the outside of the box, and the first connecting copper bar is located in the box; the second conductive connector includes a second lead-out copper bar and a second connecting copper bar, the second lead-out copper bar, the second connecting copper bar and the second positive terminal of the circuit breaker are connected in sequence, the second lead-out copper bar partially extends to the outside of the box, and the second connecting copper bar is located The box body; the third conductive connector includes a third lead-out copper bar and a third connecting copper bar, the third lead-out copper bar, the third connecting copper bar and the first negative terminal of the circuit breaker are connected in sequence, the third lead-out copper bar partially extends to the outside of the box body, and the third connecting copper bar is located in the box body; the fourth conductive connector includes a fourth lead-out copper bar and a fourth connecting copper bar, the fourth lead-out copper bar, the fourth connecting copper bar and the second negative terminal of the circuit breaker are connected in sequence, the fourth lead-out copper bar partially extends to the outside of the box body, and the fourth connecting copper bar is located in the box body.

[0012] In one embodiment of the present application, the distribution box further includes: a high-voltage sampling unit, connected between the third lead-out copper bus and the third connection copper bus, and configured to stabilize the voltage.

[0013] In one embodiment of the present application, the distribution box also includes: a pre-charging circuit, which is arranged in the box body, and the pre-charging circuit includes a pre-charging resistor and a pre-charging relay connected in sequence, the first end of the pre-charging resistor is connected to the first conductive connector, the second end of the pre-charging resistor is connected to the first end of the pre-charging relay, and the second end of the pre-charging relay is connected to the second conductive connector.

[0014] According to a second aspect of the present application, a battery pack is provided, comprising: any one of the above-mentioned distribution boxes.

[0015] According to a third aspect of the present application, a vehicle is provided, comprising: the above-mentioned battery pack.

[0016] According to the distribution box, battery pack and vehicle provided in the embodiments of the present application, the distribution box of the present application reduces the number of components in the distribution box, reduces the manufacturing cost, and reduces the heat generated in the distribution box by using a circuit breaker; by using a heat dissipation device, the heat dissipation of the components in the distribution box can be accelerated through the heat dissipation port, thereby increasing the service life of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A bottom view of a distribution box provided in one embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the internal structure of a distribution box provided in one embodiment of the utility model;

[0020] Figure 3 An exploded view of a distribution box provided in one embodiment of the utility model;

[0021] Figure 4 A linear schematic diagram provided for an embodiment of the utility model;

[0022] Figure 5 A schematic diagram of a straight line + stepped structure provided in one embodiment of the utility model;

[0023] Figure 6 A step-by-step schematic diagram provided for an embodiment of the utility model;

[0024] Figure 7 A schematic diagram of a smooth curve provided by an embodiment of the utility model;

[0025] Figure 8 A schematic diagram of the structure of a battery pack provided in one embodiment of the utility model;

[0026] Fig. 9 A schematic structural diagram of a vehicle provided in one embodiment of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more obvious, the exemplary embodiments according to the utility model will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments of the utility model, and it should be understood that the utility model is not limited to the exemplary embodiments described here. Based on the embodiments of the utility model described in the utility model, all other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the utility model.

[0028] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0029] It should be understood that the utility model can be implemented in different forms and should not be interpreted as being limited to the embodiments proposed herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

[0030] In order to thoroughly understand the present invention, a detailed structure will be presented in the following description to illustrate the technical solution proposed by the present invention. The optional embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0031] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0032] The present application provides a distribution box, such as Figure 1 and Figure 2 As shown, the distribution box 100 includes: a box body 1001 , a positive electrode loop 1002 , a negative electrode loop 1003 , a circuit breaker 1004 and a heat dissipation device 1005 .

[0033] The positive electrode loop 1002 is disposed in the box body 1001 , and includes a first conductive connector 10021 and a second conductive connector 10022 .

[0034] The negative electrode loop 1003 is disposed in the box 1001 , and includes a third conductive connector 10031 and a fourth conductive connector 10032 .

[0035] The first positive terminal of the circuit breaker 1004 is connected to one end of the first conductive connector 10021, the second positive terminal of the circuit breaker 1004 is connected to one end of the second conductive connector 10022, the first negative terminal of the circuit breaker 1004 is connected to one end of the third conductive connector 10031, and the second negative terminal of the circuit breaker 1004 is connected to one end of the fourth conductive connector 10032.

[0036] It should be noted that the circuit breaker 1004 can effectively control and protect the circuit. When the current passes through the circuit breaker 1004, if a fault such as overload or short circuit occurs, the circuit breaker 1004 can automatically disconnect the circuit to protect the circuit components from damage caused by overcurrent. At the same time, the circuit breaker 1004 replaces the original fuse and relay in the distribution box 100, which reduces the number of components and can reduce the heat generated in the distribution box 100.

[0037] The heat dissipation device 1005 is arranged at the heat dissipation opening of the box body 1001; wherein, a heat dissipation opening is arranged on one side of the box body 1001 corresponding to the connection position between the circuit breaker 1004 and the positive circuit 1002 and the negative circuit 1003.

[0038] As an example, the heat dissipation device 1005 can take away the heat in the distribution box 100 through the heat dissipation port. Specifically, the heat dissipation device 1005 can contact the above-mentioned connection position through a heat-conductive but non-conductive component to transfer the heat on the first conductive connector 10021, the second conductive connector 10022, the third conductive connector 10031, the fourth conductive connector 10032 and the circuit breaker 1004 to the heat dissipation device 1005.

[0039] As another example, the distribution box 100 also includes a low voltage connector 1006, which is connected to the entire vehicle to control the battery pack and provide stable and reliable power distribution.

[0040] The distribution box 100 of the embodiment of the utility model reduces the number of components in the distribution box 100 by using the circuit breaker 1004, reduces the manufacturing cost, and reduces the heat generated in the distribution box 100; by using the heat dissipation device 1005, the heat dissipation of the components in the distribution box 100 can be accelerated through the heat dissipation port, thereby increasing the service life of the components.

[0041] In some embodiments, the heat dissipation device 1005 includes: a first thermally conductive adhesive 10051 and a heat dissipation module 10052; the first side of the first thermally conductive adhesive 10051 is thermally connected to the first conductive connector 10021, the second conductive connector 10022, the third conductive connector 10031 and the fourth conductive connector 10032 respectively, and the second side of the first thermally conductive adhesive 10051 is thermally connected to the heat dissipation module 10052.

[0042] Specifically, the first thermally conductive adhesive 10051 transfers the heat on the first conductive connector 10021 , the second conductive connector 10022 , the third conductive connector 10031 and the fourth conductive connector 10032 to the heat dissipation module 10052 , and the heat dissipation module 10052 quickly takes the heat away from the first thermally conductive adhesive 10051 .

[0043] In this embodiment, the first thermal conductive adhesive 10051 and the heat dissipation module 10052 can effectively reduce the temperature in the distribution box 100, ensuring that the components operate within a normal operating temperature range, thereby extending the service life of the components and improving stability.

[0044] In some embodiments, Figure 3 As shown, the heat dissipation module 10052 includes: a semiconductor refrigeration sheet 100521 and a heat sink 100522; the second side of the first thermal conductive adhesive 10051 is thermally connected to the first side of the semiconductor refrigeration sheet 100521, and the second side of the semiconductor refrigeration sheet 100521 is thermally connected to the heat sink 100522.

[0045] in, Figure 3 The semiconductor cooling sheet 100521 shown in the figure can be connected to the battery management system 1008 via wires.

[0046] It should be noted that the semiconductor cooling sheet 100521 has the characteristics of no vibration or noise, no need for refrigerant, real-time temperature control, and a large controllable temperature difference range. The semiconductor cooling sheet 100521 is a heat transfer tool. When current passes through a thermocouple pair formed by connecting a piece of N-type semiconductor material and a piece of P-type semiconductor material, heat transfer will occur between the two ends, and the heat will be transferred from one end to the other end, thereby generating a temperature difference to form a cold end and a hot end, and taking away the heat in the distribution box 100.

[0047] Specifically, each terminal of the circuit breaker 1004 can be designed to face the direction of the semiconductor cooling sheet 100521 to facilitate the arrangement of the first thermal conductive adhesive 10051.

[0048] As an example, the box body 1001 of the distribution box 100 may be opened at the bottom to form a heat dissipation port. Meanwhile, the connection positions of the circuit breaker 1004 and the positive circuit 1002 and the negative circuit 1003 are arranged at the bottom of the distribution box 100, and the semiconductor cooling sheet 100521 is also correspondingly arranged at the bottom of the distribution box 100.

[0049] Specifically, the heat dissipation module 10052 also includes: a second thermally conductive adhesive 100523 , and the second thermally conductive adhesive 100523 is fixed between the semiconductor cooling sheet 100521 and the heat dissipation sheet 100522 .

[0050] In this embodiment, the heat inside the distribution box 100 can be efficiently transferred from the semiconductor cooling sheet 100521 to the heat sink 100522 through the semiconductor cooling sheet 100521, ensuring that the components operate within a suitable temperature range. At the same time, by using the fixing method of thermal conductive glue, the volume of the distribution box 100 is reduced, saving space.

[0051] In some embodiments, Figure 2 As shown, the distribution box 100 further includes: a temperature sensor 1007 and a battery management system 1008 .

[0052] The temperature sensor 1007 is disposed on the surface of the first conductive connection member 10021 and is configured to collect the temperature of the first conductive connection member 10021 .

[0053] The battery management system 1008 (Battery Management System, BMS) is connected to the temperature sensor 1007 and the semiconductor cooling chip 100521 respectively, and is configured to control the on-off of the current in the semiconductor cooling chip 100521 according to the collection result of the temperature sensor 1007.

[0054] As an example, when the distribution box 100 is overcurrented, the first conductive connector 10021 will generate heat, and the temperature sensor 1007 collects the temperature on the first conductive connector 10021 and sends it to the battery management system 1008. When it is detected that the collected temperature is greater than the preset temperature, the battery management system 1008 supplies power to the semiconductor refrigeration chip 100521, and the semiconductor refrigeration chip 100521 starts working to take away the heat in the distribution box 100.

[0055] As another example, the distribution box 100 may also include: a BMC (Battery Management Controller), which is connected to the BMS and the semiconductor refrigeration chip 100521 respectively, and is configured to control the on and off of the current in the semiconductor refrigeration chip 100521 according to the information provided by the BMS.

[0056] Due to the easy and precise control of the semiconductor refrigeration chip 100521, an operating strategy can be set in the BMS to match the temperature with the heat dissipation power, rather than running at full power immediately when the set temperature is reached, which can reduce energy consumption.

[0057] Specifically, the operation strategy can be set to straight line, straight line + step, step and smooth curve.

[0058] As an example, Figure 4 As shown in the figure, the heat dissipation power of the linear operation strategy is proportional to the temperature, which is relatively simple and reduces the operating pressure of the BMS. However, this strategy has a single control strategy. When the temperature rises to an extremely high level, the semiconductor cannot operate at full power, which has a significant impact on the heat dissipation effect. Figure 5 As shown, adding a high temperature control point to the linear type can transform it into a linear + step operation strategy, which can realize linear control of power before the high temperature control point and realize full power operation of the semiconductor refrigeration plate 100521 after the high temperature control point. Figure 6 As shown in the figure, adding multiple temperature control points to the linear + step operation strategy can turn it into a step operation strategy. This strategy is more sensitive to temperature, closer to the heating curve of the distribution box, and has a more ideal heat dissipation effect. Figure 7 As shown in the figure, further increasing the temperature control points, the more temperature control points there are, the smoother the curve is, that is, the closer it is to the actual heating curve, the more ideal the heat dissipation effect is. However, the smooth curve operation strategy is difficult, has high requirements for the BMS, and requires a large amount of experimental data for fitting.

[0059] In this embodiment, the semiconductor cooling plate 100521 can be precisely controlled through the battery management system 1008 and the temperature sensor 1007, so that the distribution box 100 is in the best working state, thereby increasing the service life of components.

[0060] In some embodiments, Figure 3 As shown, the semiconductor cooling sheet 100521 and the heat sink 100522 are fixed to the outside of the box body 1001 by bolts 100524.

[0061] As an example, the number of bolts 100524 can be 4, located at the four corners of the heat sink 100522 respectively.

[0062] In some embodiments, the heat dissipation module 10052 is one of a liquid cooling plate and a phase change material.

[0063] It should be noted that a liquid cold plate is a type of device that uses a liquid cooling medium (usually water or other coolants) to absorb and dissipate heat. In a liquid cold plate, the coolant flows through a thermally conductive material or pipe, absorbs heat, and flows to the radiator, where it transfers the heat to the surrounding environment. Phase change material is a material that can absorb or release a large amount of heat when the temperature changes. Phase change materials usually exist in a solid state. When the temperature rises, the phase change material absorbs heat and undergoes a phase change to store the heat; when the temperature drops, the phase change material releases the stored heat.

[0064] In this embodiment, the temperature inside the distribution box 100 can be effectively reduced by a liquid cooling plate or a phase change material, thereby improving the heat dissipation effect of the heat dissipation module 10052 .

[0065] In some embodiments, the first conductive connection member 10021 , the second conductive connection member 10022 , the third conductive connection member 10031 , and the fourth conductive connection member 10032 are copper busbars.

[0066] Specifically, the first conductive connector 10021 includes a first lead-out copper bar 100211 and a first connection copper bar 100212, the first lead-out copper bar, the first connection copper bar and the first positive terminal of the circuit breaker 1004 are connected in sequence, the first lead-out copper bar partially extends to the outside of the box 1001, and the first connection copper bar is located in the box 1001. The second conductive connector 10022 includes a second lead-out copper bar 100221 and a second connection copper bar 100222, the second lead-out copper bar, the second connection copper bar and the second positive terminal of the circuit breaker 1004 are connected in sequence, the second lead-out copper bar partially extends to the outside of the box 1001, and the second connection copper bar is located in the box 1001. The third conductive connector 10031 includes a third lead-out copper bar 100311 and a third connection copper bar 100312. The third lead-out copper bar, the third connection copper bar and the first negative terminal of the circuit breaker 1004 are connected in sequence. The third lead-out copper bar partially extends to the outside of the box 1001, and the third connection copper bar is located in the box 1001. The fourth conductive connector 10032 includes a fourth lead-out copper bar 100321 and a fourth connection copper bar 100322. The fourth lead-out copper bar, the fourth connection copper bar and the second negative terminal of the circuit breaker 1004 are connected in sequence. The fourth lead-out copper bar partially extends to the outside of the box 1001, and the fourth connection copper bar is located in the box 1001.

[0067] In this embodiment, copper has excellent thermal conductivity and can quickly transfer heat to help dissipate heat.

[0068] In some embodiments, Figure 2As shown, the distribution box 100 also includes: a pre-charging circuit 1009, which is arranged in the box body 1001, and the pre-charging circuit 1009 includes a pre-charging resistor 10091 and a pre-charging relay 10092 connected in sequence, the first end of the pre-charging resistor 10091 is connected to the first conductive connecting member 10021, the second end of the pre-charging resistor 10091 is connected to the first end of the pre-charging relay 10092, and the second end of the pre-charging relay 10092 is connected to the second conductive connecting member 10022.

[0069] In this embodiment, the pre-charging circuit 1009 can provide a pre-charging function when the distribution box 100 is started, thereby controlling the rising speed of the current and protecting the circuit from damage caused by excessive starting current. At the same time, the temperature of components of the circuit is prevented from rising due to excessive current.

[0070] In some embodiments, the distribution box 100 further includes: a high voltage sampling unit 1010 (High Voltage Sampling Unit, HVSU), which is connected between the third lead-out copper bus and the third connection copper bus and is configured to stabilize the voltage.

[0071] In this embodiment, the high voltage sampling unit 1010 can monitor the output voltage in real time and adjust it as needed to ensure stable output of the voltage.

[0072] In addition, the present application provides a battery pack, such as Figure 8 As shown, the battery pack 10 includes: any one of the above-mentioned distribution boxes 100.

[0073] The battery pack 10 of the embodiment of the utility model can reduce the production cost of the battery pack 10 and improve the heat dissipation efficiency of the battery pack 10 by using the distribution box 100 .

[0074] In addition, the present application provides a vehicle 1, such as Fig. 9 As shown, the vehicle 1 includes: the battery pack 10 mentioned above.

[0075] The vehicle 1 according to the embodiment of the utility model can reduce the production cost of the whole vehicle and improve the heat dissipation efficiency by using the battery pack 10.

[0076] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0077] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a functional division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0078] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0079] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various utility model aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. The claimed application requires more features than those explicitly stated in each claim. More specifically, as reflected in the corresponding claims, its utility model point is that the corresponding technical problem can be solved with features less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0080] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including accompanying claims, abstracts and drawings) and all units of any device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0081] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0082] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present application may be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

[0083] The above is only a specific implementation or description of a specific implementation of the present application, and the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A distribution box, characterized in that: The distribution box comprises: Box; A positive electrode circuit is disposed in the box, and the positive electrode circuit includes a first conductive connector and a second conductive connector; A negative electrode loop is disposed in the box, and the negative electrode loop includes a third conductive connector and a fourth conductive connector; A circuit breaker, wherein a first positive terminal of the circuit breaker is connected to one end of the first conductive connector, a second positive terminal of the circuit breaker is connected to one end of the second conductive connector, a first negative terminal of the circuit breaker is connected to one end of the third conductive connector, and a second negative terminal of the circuit breaker is connected to one end of the fourth conductive connector; A heat dissipation device, arranged at the heat dissipation opening of the box; Wherein, the heat dissipation port is provided on one side of the box body corresponding to the connection position between the circuit breaker and the positive circuit and the negative circuit.

2. The distribution box according to claim 1, characterized in that: The heat dissipation device comprises: a first thermal conductive adhesive and a heat dissipation module; The first side surface of the first thermally conductive adhesive is thermally connected to the first conductive connector, the second conductive connector, the third conductive connector and the fourth conductive connector respectively, and the second side surface of the first thermally conductive adhesive is thermally connected to the heat dissipation module.

3. The distribution box according to claim 2, characterized in that: The heat dissipation module comprises: a semiconductor refrigeration sheet and a heat sink; The second side surface of the first thermally conductive adhesive is thermally connected to the first side surface of the semiconductor refrigeration sheet, and the second side surface of the semiconductor refrigeration sheet is thermally connected to the heat sink.

4. The distribution box according to claim 3, characterized in that: The heat dissipation module further includes: a second heat conductive adhesive, and the second heat conductive adhesive is fixed between the semiconductor refrigeration sheet and the heat dissipation sheet.

5. The distribution box according to claim 3 or 4, characterized in that: The distribution box also includes: a temperature sensor, disposed on a surface of the first conductive connecting member, and configured to collect a temperature of the first conductive connecting member; The battery management system is connected to the temperature sensor and the semiconductor refrigeration chip respectively, and is configured to control the on-off of the current in the semiconductor refrigeration chip according to the collection result of the temperature sensor.

6. The distribution box according to claim 3, characterized in that: The semiconductor refrigeration sheet and the heat sink are fixed to the outside of the box body by bolts.

7. The distribution box according to claim 2, characterized in that: The heat dissipation module is one of a liquid cooling plate and a phase change material.

8. The distribution box according to claim 1, characterized in that: The first conductive connection member, the second conductive connection member, the third conductive connection member and the fourth conductive connection member are copper busbars.

9. The distribution box according to claim 8, characterized in that: The first conductive connector includes a first lead-out copper bar and a first connection copper bar, the first lead-out copper bar, the first connection copper bar and the first positive terminal of the circuit breaker are connected in sequence, the first lead-out copper bar partially extends out of the box, and the first connection copper bar is located in the box; The second conductive connector includes a second lead-out copper bar and a second connecting copper bar, the second lead-out copper bar, the second connecting copper bar and the second positive terminal of the circuit breaker are connected in sequence, the second lead-out copper bar partially extends to the outside of the box, and the second connecting copper bar is located in the box; The third conductive connector includes a third lead-out copper bar and a third connection copper bar, the third lead-out copper bar, the third connection copper bar and the first negative terminal of the circuit breaker are connected in sequence, the third lead-out copper bar partially extends to the outside of the box, and the third connection copper bar is located in the box; The fourth conductive connector includes a fourth lead-out copper bar and a fourth connecting copper bar. The fourth lead-out copper bar, the fourth connecting copper bar and the second negative terminal of the circuit breaker are connected in sequence. The fourth lead-out copper bar partially extends to the outside of the box, and the fourth connecting copper bar is located in the box.

10. The distribution box according to claim 9, characterized in that: The distribution box further includes: a high-voltage sampling unit connected between the third lead-out copper bus and the third connection copper bus and configured to stabilize the voltage.

11. The distribution box according to claim 1, characterized in that: The distribution box also includes: a pre-charging circuit, which is arranged in the box body, and the pre-charging circuit includes a pre-charging resistor and a pre-charging relay connected in sequence, the first end of the pre-charging resistor is connected to the first conductive connector, the second end of the pre-charging resistor is connected to the first end of the pre-charging relay, and the second end of the pre-charging relay is connected to the second conductive connector.

12. A battery pack, characterized in that: include: A distribution box as claimed in any one of claims 1 to 11.

13. A vehicle, characterized in that: include: The battery pack as claimed in claim 12.

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