Battery energy distribution unit and power battery

Abstract

A battery energy distribution unit and a power battery comprising the battery energy distribution unit. The battery energy distribution unit comprises the following components: a box body (1); a plurality of electrical elements (7, 61, 62, 63, 64, 65) provided in the inner cavity of the box body; at least one circuitry integration module (3, 4), comprising an insulating base body (3-1, 40), and at least two electrical connectors integrated on the insulating base body, wherein each of the electrical connectors has a first connection end portion; and when the insulating base body is mounted on the box body, one of the first connection end portions is in contact with and electrically connected to a connection position of one of the electrical elements, so as to be configured as a signal acquisition line, a relay drive line, or a pre-charging loop line. By replacing the wire harness in the prior art with the circuitry integration module, the electrical connectors in the circuitry integration module can achieve communication between the signal acquisition line, the relay drive line, and the pre-charging loop line, thereby implementing a wire harness-free configuration inside the box body of the battery energy distribution unit; at the same time, installation of the entire module can be implemented, which is beneficial to fully automated production and improves cost-effectiveness.

Description

A battery energy distribution unit and a power battery

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411204184.3, filed on August 29, 2024, entitled “A Battery Energy Distribution Unit and a Power Battery”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of batteries, and in particular to a battery energy distribution unit and a power battery. Background Technology

[0004] The Battery Energy Distribution Unit (BDU), also known as the high-voltage box, is a core component of a power battery. The BDU not only effectively controls the on / off state of the power battery circuit and provides overload and short-circuit protection, but also functions as current detection, relay status monitoring, and temperature detection of critical high-voltage connection points. Therefore, the BDU contains a relatively large number of internal electrical components, requiring numerous wiring harnesses to connect these components and achieve the aforementioned functions.

[0005] Currently, BDU assembly typically involves manual tasks such as cable management, securing wire harnesses, and plugging in connectors. This process is difficult, time-consuming, inefficient, and prone to errors.

[0006] Therefore, how to overcome the above-mentioned defects in the existing technology, reduce the assembly difficulty of BDU, and improve the assembly efficiency is a technical problem that those skilled in the art have always been concerned about. Summary of the Invention

[0007] The purpose of this application is to provide a BDU and a power battery having the BDU. The BDU does not require manual wiring during assembly, which greatly reduces the difficulty of BDU assembly and improves assembly efficiency.

[0008] This application provides a battery energy distribution unit, including the following components:

[0009] Box;

[0010] Multiple electrical components are disposed within the inner cavity of the enclosure;

[0011] At least one circuit integration module includes an insulating substrate and at least two electrical connectors integrated on the insulating substrate, each of the electrical connectors having a first connection end, wherein when the insulating substrate is mounted on the housing, one of the first connection ends makes contact with a connection position of one of the electrical components to be configured as a signal acquisition circuit, a relay drive circuit, or a precharge circuit circuit.

[0012] In this embodiment, when the insulating substrate is positioned within the enclosure, each first connection end is electrically connected to the connection position one-to-one. That is, the position of the first connection end of each electrical connector in the circuit integration module provided in this application can be set according to the connection position on the connected electrical component. When the insulating substrate is positioned within the enclosure, each first connection end is precisely in contact with its connected connection position to achieve electrical connection. The circuit integration module can replace the wire harnesses in the prior art. By reasonably setting the number of circuit integration modules, the signal acquisition circuit, relay drive circuit, and pre-charge circuit can be connected entirely through the electrical connectors in the circuit integration module, achieving wireless wiring within the BDU enclosure. Furthermore, in this embodiment, the circuit integration module can be designed with specific characteristics to suit the internal space of the BDU, allowing for a reasonable layout. Simultaneously, the modular design of the circuit integration module enables overall installation, facilitating fully automated production of the BDU, significantly reducing production cycle time, and thus improving cost advantages.

[0013] In one example, the line integration module includes a low-voltage line integration module and a high-voltage line integration module, the connection position includes a low-voltage connection position and a high-voltage connection position, the electrical connector of the low-voltage line integration module is electrically connected to the low-voltage connection position, and the electrical connector of the high-voltage line integration module is electrically connected to the high-voltage connection position.

[0014] In one example, the low-voltage connection location includes multiple low-voltage signal acquisition locations and multiple relay drive connection locations;

[0015] All electrical connectors in the same low-voltage line integration module are electrically connected to one of the multiple low-voltage signal acquisition locations;

[0016] Alternatively, all electrical connectors in the same low-voltage line integration module are electrically connected to one of the multiple relay drive connection positions;

[0017] Alternatively, some of the electrical connectors in the same low-voltage line integration module are electrically connected to the low-voltage signal acquisition positions in a one-to-one correspondence, and some of the electrical connectors are electrically connected to at least some of the relay drive connection positions in a one-to-one correspondence.

[0018] In one example, the insulating substrate of at least one of the low-voltage line integrated modules is integrally injection molded with the housing;

[0019] Alternatively, the insulating substrate of the low-voltage line integrated module may be directly or indirectly positioned and connected to the inner wall of the enclosure.

[0020] In one example, the enclosure includes a main body and a cover, and the circuit integration module is integrated on both the main body and the cover.

[0021] In one example, the line integration module includes a low-voltage line integration module and a high-voltage line integration module. The low-voltage line integration module is integrated into the cover, and the high-voltage line integration module is integrated into the box body. The electrical connector of the low-voltage line integration module is electrically connected to the low-voltage connection position in the connection location, and the electrical connector of the high-voltage line integration module is electrically connected to the high-voltage connection position in the connection location.

[0022] In one example, the high-voltage connection location includes a high-voltage signal acquisition location and a pre-charge circuit connection location;

[0023] All electrical connectors in the same high-voltage line integration module are electrically connected to one of the multiple high-voltage signal acquisition locations;

[0024] Alternatively, all electrical connectors in the same high-voltage line integrated module are electrically connected to the pre-charge circuit connection position one-to-one.

[0025] Alternatively, some of the electrical connectors in the high-voltage line integration module are electrically connected to the high-voltage signal acquisition location, and some of the electrical connectors are electrically connected to the pre-charge circuit connection location to achieve pre-charge circuit connection.

[0026] In one example, the insulating substrate of the high-voltage line integrated module includes a support wall, which is integrally formed with the bottom wall of the enclosure or supported on the bottom wall of the enclosure. The support wall is provided with at least one installation station, and each installation station is installed in conjunction with one of the electrical components. Each first connection end is provided at the installation station.

[0027] In one example, several of the plurality of electrical components are connected to a high-voltage circuit, the high-voltage circuit including at least one busbar, the electrical components connected to the high-voltage circuit being electrically connected through the busbar, the busbar being fixed to the bottom wall of the enclosure, the support wall having clearance through holes, the connecting end of the busbar passing through the through holes and being electrically connected to the corresponding electrical component.

[0028] In one example, the conductive busbar is fixed to the outside of the bottom wall of the enclosure, and the connecting end of the conductive busbar passes through the bottom wall of the enclosure and is electrically connected to the corresponding electrical component in the high-voltage circuit.

[0029] In one example, a heat dissipation device is also included, which is located on the outside of the bottom wall of the enclosure and is used to cool the battery energy distribution unit. The bottom wall of the enclosure has a planar structure, and the heat dissipation device includes a cold plate. A thermally conductive adhesive layer is also provided between the cold plate and the bottom wall of the enclosure.

[0030] In one example, all electrical connectors in the circuit integration module also have second connection ports exposed outside the insulating base. All second connection ports in the same circuit integration module converge to form a port assembly. The housing is provided with through holes so that the port assembly can be electrically connected to external electronic devices.

[0031] Furthermore, this application embodiment also provides a power battery, comprising:

[0032] Battery casing;

[0033] In any of the above-mentioned battery energy distribution units, the housing is located inside the battery casing or fixed to the outside of the battery casing.

[0034] In the embodiments of this application, the power battery has the above-mentioned BDU, so the power battery also has the above-mentioned technical effects of the BDU. Attached Figure Description

[0035] Figure 1 is a three-dimensional schematic diagram of the battery energy distribution unit provided in an embodiment of this application;

[0036] Figure 2 is an exploded view of the structure shown in Figure 1;

[0037] Figure 3 is a schematic diagram of the assembly of the cover and the circuit integration module in the structure shown in Figure 2.

[0038] Figure 4 is a schematic diagram of the arrangement of electrical connectors with connectors in the circuit integration module of the structure shown in Figure 3.

[0039] Figure 5 is a schematic diagram of the structure of the second line integration module in the embodiment of this application;

[0040] Figure 6 is a schematic diagram of the structure of the third line integration module in one embodiment of this application;

[0041] Figure 7 is a schematic diagram of the structure of the outer side of the bottom wall of the box body in an embodiment of this application. Specific Implementation

[0042] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Please refer to Figures 1 to 7. Figure 1 is a three-dimensional schematic diagram of the battery energy distribution unit provided in the embodiment of this application; Figure 2 is an exploded schematic diagram of the structure shown in Figure 1; Figure 3 is a schematic diagram of the assembly of the cover and the circuit integration module in the structure shown in Figure 2; Figure 4 is a schematic diagram of the arrangement of the electrical connectors with connectors in the circuit integration module in the structure shown in Figure 3; Figure 5 is a structural schematic diagram of the second circuit integration module in the embodiment of this application; Figure 6 is a structural schematic diagram of the third circuit integration module in one embodiment of this application; Figure 7 is a structural schematic diagram of the outer side of the bottom wall of the main body of the box in the embodiment of this application.

[0044] In this embodiment, the power battery can be applied to electric vehicles, and of course, it can also be applied to other fields. This article takes the application of the power battery to electric vehicles as an example to continue to introduce the technical solution and technical effects. The power battery includes components such as the battery casing and the battery energy distribution unit (hereinafter referred to as BDU100). The BDU100 is an important protection module of the high-voltage circuit system and an important component of the vehicle control system of electric vehicles. The BDU100 can be integrated inside the battery casing of the power battery or placed outside the battery casing. The BDU100 includes a housing 1 and multiple electrical components located inside the housing 1. The electrical components include relays, fuses, pre-charge resistors, current sensors, etc. Figure 2 only shows some of the electrical components: fuse 7 and relays 61, 62, 63, 64, and 65.

[0045] Depending on the circuit it's connected to, there are various types of relays, such as the main relay connected to the main circuit of the power battery, and the pre-charge relay for the pre-charge circuit. The main function of the main relay is to open / close the DC current in the main circuit of the power battery. The pre-charge relay can protect the high-voltage circuit from the instantaneous large current surge when the system is powered on. The current sensor is used to measure and calculate the capacity of the power battery, and the fuse mainly provides protection by breaking the circuit during overcurrent. When the voltage of the battery module inside the power battery is too high or too low, the BDU100 can disconnect the relay to stop the battery module from supplying power to the outside world, thus ensuring the normal use and performance of the battery module.

[0046] When BDU100 is located inside the battery casing, the housing 1 can be a non-metallic part, such as an injection-molded part. When BDU100 is located outside the battery casing, the housing 1 can be a metallic part, or a mixture of a metallic part and an injection-molded part.

[0047] In this embodiment, the box body 1 includes a box body 11 and a cover 12. The box body 11 has an inner cavity with a top opening, and the cover 12 closes to the opening. The two can be connected by a snap-fit ​​method. One of the box body 11 and the cover 12 is provided with a locking block, and the other is provided with a locking groove that can engage with the locking block. Figure 1 shows an example where the box body 11 is provided with a locking block 111 and the cover 12 is provided with a locking ring 121 with a locking groove. The box body 11 and the cover 12 are simply fixed by snap-fit. Of course, the connection method of the box body 11 and the cover 12 is not limited to the one described herein, and can also be other forms, such as hinged on one side and snap-fit ​​connection on the other side.

[0048] In this embodiment, the BDU100 further includes at least one line integration module, which is mainly connected to the signal acquisition circuit, the relay drive circuit, and the pre-charge circuit. The signal acquisition circuit is mainly used to acquire operating parameter signals of the internal electrical components of the BDU100, such as temperature, voltage, and current signals. The relay drive circuit mainly controls the relay switching action; the pre-charge circuit is used to protect the main circuit.

[0049] In this embodiment, the circuit integration module includes an insulating substrate and at least two electrical connectors integrated on the insulating substrate. Adjacent electrical connectors are separated by the insulating substrate, meaning each electrical connector is an independent conductive element. Each electrical connector has a first connection end, which can be in the form of a port, a connecting piece, or other forms. The first connection end is used to electrically connect to a connection location of an electrical component for signal acquisition, relay driving, or pre-charge circuit connection. In other words, the first connection end of an electrical connector is used to connect to a designated location on an electrical component inside the housing 1 to achieve one of the functions of signal acquisition, relay driving, or pre-charge circuit connection. In one example, the first connection end is exposed outside the insulating substrate to facilitate connection to the corresponding electrical component.

[0050] In this embodiment, when the insulating substrate is positioned on the housing 1, each first connection end makes contact with the connection position of an electrical component. That is, the position of the first connection end of each electrical connector in the circuit integration module provided in this application can be set according to the connection position on the connected electrical component. When the insulating substrate is installed on the housing 1, each first connection end corresponds precisely to its connected connection position and can make contact to achieve electrical connection, thereby configuring it as a signal acquisition line, relay drive line, or pre-charge circuit line. The circuit integration module can replace the wire harness in the prior art. By reasonably setting the number of circuit integration modules, the three functions of signal acquisition, relay drive, and pre-charge circuit connection can be achieved entirely through the electrical connectors in the circuit integration module, realizing no wire harness setup inside the BDU100 housing 1. Furthermore, in this embodiment, the circuit integration module can be designed with specific characteristics in conjunction with the internal space of the BDU100 for reasonable layout. Simultaneously, the modular design of the circuit integration module enables overall installation, which is beneficial for the BDU100 to achieve fully automated production, greatly reducing production cycle time and thus improving cost advantages.

[0051] In this embodiment, the electrical connector can be a conductive busbar, such as a copper busbar or an aluminum busbar, balancing conductivity and economy. The conductive busbar can be manufactured into a suitable shape through stamping and bending to meet the direct connection requirements with the electrical connector. Of course, the electrical connector can also be made of other materials, as long as it can achieve the conductivity function.

[0052] The first and second connecting ends can also be connected to the terminals by electrical connectors through soldering or ultrasonic welding, and then a low-voltage connector housing is injection molded on the outside to facilitate connection with the mating parts. Please refer to Figures 4 and 5 for understanding.

[0053] Depending on the voltage level, the connection positions on each of the above electrical connectors include at least one low-voltage connection position and one high-voltage connection position. The electrical connectors electrically connected to the low-voltage connection position and the electrical connectors electrically connected to the high-voltage connection position are not located in the same line integration module.

[0054] In other words, the connection positions on each of the aforementioned electrical connectors include at least one low-voltage connection position and at least one high-voltage connection position. In the BDU100 design, it is clear to those skilled in the art which positions represent low-voltage signals (low-voltage connection positions) and which represent high-voltage signals (high-voltage connection positions). Even without describing the specific internal structure of the BDU100, those skilled in the art can clearly and effortlessly discern which positions in the BDU100 represent low-voltage connections and which represent high-voltage connections, and there is no technical obstacle to understanding the technical solution described herein.

[0055] In this embodiment, the electrical connectors electrically connected to the low-voltage connection location and the electrical connectors electrically connected to the high-voltage connection location are not located in the same line integration module. In other words, if an electrical connector in a line integration module is electrically connected to the low-voltage connection location, then there are no electrical connectors in that line integration module connected to the high-voltage connection location. Similarly, if one electrical connector in a line integration module is electrically connected to the high-voltage connection location, then the other electrical connectors are not electrically connected to the low-voltage connection location. Specifically, the line integration module includes a low-voltage line integration module and a high-voltage line integration module. The electrical connectors of the low-voltage line integration module are electrically connected to the low-voltage connection location, and the electrical connectors of the high-voltage line integration module are electrically connected to the high-voltage connection location.

[0056] In this embodiment, the electrical connectors connected to the low-voltage connection position and the electrical connectors connected to the high-voltage connection position are located in different line integration modules. This avoids mutual interference between high-voltage and low-voltage signals to a certain extent, and in particular, reduces the impact of magnetic interference generated by high-voltage signals on low-voltage signals, thereby improving the accuracy of low-voltage and high-voltage signal detection results.

[0057] In this embodiment, the low-voltage connection location includes multiple low-voltage signal acquisition locations and multiple relay drive connection locations. The line integration module includes at least one low-voltage line integration module. Depending on the different objects connected to the first connection end of the electrical connector in the low-voltage line integration module, the low-voltage line integration module can generally take the following three forms:

[0058] In the first implementation, all electrical connectors in the same low-voltage line integration module are electrically connected to multiple low-voltage signal acquisition locations in a one-to-one correspondence.

[0059] In the second implementation, all electrical connectors in the same low-voltage line integration module are electrically connected to multiple relay drive connection positions in a one-to-one correspondence.

[0060] In the third implementation, some electrical connectors in the same low-voltage line integration module are electrically connected to the low-voltage signal acquisition positions in a one-to-one correspondence, and some electrical connectors are electrically connected to at least some relay drive connection positions in a one-to-one correspondence.

[0061] Based on the distribution of low-voltage connection locations, the arrangement position of the first connection end of each electrical connector in the low-voltage line integration module can be reasonably selected, so that the structure of each electrical connector is simple and the layout is reasonable.

[0062] This application illustrates two low-voltage line integration modules: a first line integration module 3 and a second line integration module 4. Both the first line integration module 3 and the second line integration module 4 are implemented in the third embodiment. Some electrical connectors are electrically connected to low-voltage signal acquisition positions in a one-to-one correspondence, and some electrical connectors are electrically connected to at least some relay drive connection positions in a one-to-one correspondence. The differences lie in the shape, number of electrical connectors, and installation position of the insulating substrate of the first line integration module 3 and the second line integration module 4.

[0063] In one specific embodiment, the first circuit integration module 3 includes a first insulating substrate 3-1 and several electrical connectors. The first insulating substrate 3-1 wraps around each electrical connector. The first insulating substrate 3-1 can be directly installed on the cover 12 of the housing 1. Alternatively, the first insulating substrate 3-1 can be integrally formed with the cover 12, for example, by injection molding. Figure 4 shows several electrical connectors including: a first electrical connector 31a, a second electrical connector 31b, a third electrical connector 32a, a fourth electrical connector 32b, a fifth electrical connector 33a, a sixth electrical connector 33b, a seventh electrical connector 34a, and an eighth electrical connector 34b. In this embodiment, the first connection ends of two or more electrical connectors connected to the same electrical circuit or adjacent to each other can be centrally located inside a single connector to reduce space occupation. For example, the first connecting ends of the first electrical connector 31a and the second electrical connector 31b have a first connector 31, the first connecting ends of the third electrical connector 32a and the fourth electrical connector 32b have a second connector 32, the first connecting ends of the fifth electrical connector 33a and the sixth electrical connector 33b have a third connector 33, and the first connecting ends of the seventh electrical connector 34a and the eighth electrical connector 34b also have a fourth connector 34, which facilitates plugging and electrical connection with electrical components.

[0064] Please refer to Figure 2 again for understanding. When the first insulating substrate 3-1 is integrally formed with the cover 12, and the cover 12 closes to the opening of the main body 11, the connector in the first circuit integration module can be inserted into the corresponding connection position of the electronic component inside the main body. Due to limitations in the display of Figure 2, the connection positions of the electronic components inside the main body are not fully shown; only the connection position 611 on the relay 61 is shown, and the second connector 32 is inserted and mated with the connection position 611. The mating of other connectors and connection positions can be understood by referring to the above description.

[0065] Of course, the first insulating substrate 3-1 and the cover 12 can also be two independent components, which are fixedly installed together. The fixing structure can be adhesive or bolted connection, etc. For example, the first insulating substrate 3-1 can be provided with a mounting area 3-11 for fixing holes for fixed installation on the cover 12.

[0066] In this embodiment, the insulating substrate of the second circuit integration module 4 is defined as the second insulating substrate 40. The second insulating substrate wraps around the outside of each electrical connector. The second insulating substrate 40 can be indirectly supported inside the housing 1, for example, the second insulating substrate 40 can be positioned and supported on a bracket or electrical component. Figure 5 shows the connectors disposed on the first connection ends of the corresponding electrical connectors on the second circuit integration module 4: connector one 41, connector two 42, and connector three 43. The function of the connectors is the same as described above.

[0067] Of course, the number of low-voltage line integrated modules is not limited to the two described in this application, and can be set according to requirements. The insulating substrate of at least one low-voltage line integrated module is integrally injection molded with the main body 11 or cover 12 of the enclosure, which improves the compactness of the internal structure of the BDU and reduces space occupation.

[0068] In this embodiment, the high-voltage connection location includes a high-voltage signal acquisition location and a pre-charge circuit connection location. The line integration module also includes at least one high-voltage line integration module. Based on the different connection location types of the first connection end of the internal electrical connectors of the high-voltage line integration module, there are roughly three types:

[0069] The first type: All electrical connectors in the same high-voltage line integrated module are electrically connected to multiple high-voltage signal acquisition locations in a one-to-one correspondence.

[0070] The second type: All electrical connectors in the same high-voltage line integrated module are electrically connected to the pre-charge circuit connection position in a one-to-one correspondence.

[0071] The third type: Some electrical connectors in the high-voltage line integrated module are electrically connected to the high-voltage signal acquisition position, and some electrical connectors are electrically connected to the pre-charge circuit connection position to realize the pre-charge circuit connection.

[0072] Technicians can rationally select the arrangement position of the first connection end of each electrical connector in the high-voltage line integrated module based on the distribution of high-voltage connection positions, so that the structure of each electrical connector is simple and the layout is reasonable.

[0073] This application embodiment illustrates a high-voltage line integration module: a third line integration module 5, with some electrical connectors electrically connected to the high-voltage signal acquisition location and some electrical connectors electrically connected to the pre-charge circuit connection location to achieve pre-charge circuit connection. In this embodiment, the line integration module has a compact layout.

[0074] The following describes a space-saving third-line integrated module 5.

[0075] In this embodiment, some electrical components are inverted and assembled inside the housing 1. The insulating substrate of the third circuit integration module 5 includes a support wall, which is integrally formed with the bottom wall of the housing 1 or supported by the bottom wall of the housing 1. At least one installation station is provided on the support wall, and each installation station is installed in conjunction with an electrical component. Each first connection end is located at the installation station. In this embodiment, the electrical components are inverted and placed inside the housing 1. The electrical connection end between the electrical component and the third circuit integration module 5 is located at the lower end of the electrical component. To a certain extent, the electrical component can press the first connection end against itself under its own weight. The first connection end can be a sheet 51, eliminating the need for a connector and simplifying the structure.

[0076] In the case where the support wall 50 and the bottom wall 112 of the box are relatively independent, a positioning structure can be further provided on the support wall 50 to cooperate with the inner wall of the box 1 for positioning. The positioning structure can be a snap-fit ​​or screw fixing method to further improve the reliability of the fixation between the support wall 50 and the box 1.

[0077] Figure 6 shows an example of four installation stations on the support wall 50. The four installation stations are: first installation station 5a, second installation station 5b, third installation station 5c, and fourth installation station 5d, which are respectively equipped with relay 1 61, relay 3 63, relay 5 65, and relay 4 64. The number and arrangement of the installation stations on the support wall 50 are mainly determined by the electrical components that need to be connected in BDU100.

[0078] In this embodiment, several of the multiple electrical components are connected to a high-voltage circuit. The high-voltage circuit includes at least one conductive busbar. The electrical components connected to the high-voltage circuit are connected via the conductive busbar. The conductive busbar is fixed to the bottom wall 112 of the housing 1. The support wall 50 has a clearance through-hole 511 so that the connection end of the conductive busbar can be electrically connected to the corresponding electrical component, i.e., the connection end of the conductive busbar passes through the through-hole 511 to electrically connect to the corresponding electrical component. Compared to the low-voltage circuit, the current in the high-voltage circuit is relatively large, therefore the width of the conductive busbar connected to the bottom wall 112 of the housing is relatively large. The conductive busbar can be made of copper or aluminum.

[0079] In this embodiment, the connection between electrical components in the high-voltage circuit is through a busbar, which provides high reliability of the electrical connection and helps to further simplify the internal structure of the enclosure 1.

[0080] In one specific embodiment, the conductive busbar 8 is fixed to the outer side of the bottom wall of the enclosure, and the connecting end 81 of the conductive busbar 8 passes through the bottom wall of the enclosure and is electrically connected to the corresponding electrical components in the high-voltage circuit. In this embodiment, the conductive busbar 8 can be fixed to the bottom wall of the enclosure by injection molding, which is simple to fix, and the location of the conductive busbar 8 on the outer side of the bottom wall 112 of the enclosure is conducive to the dissipation of heat from the conductive busbar.

[0081] The integration method of low-voltage line integration module and high-voltage line integration module on the enclosure is not limited to that described in this article. Depending on the specific product structure, the low-voltage line integration module and high-voltage line integration module can be set in a suitable position on the enclosure.

[0082] To facilitate timely heat dissipation from the electronic components of the BDU100, this embodiment of the BDU100 also includes a heat dissipation device (not shown in the figure). The heat dissipation device is located on the outer side of the bottom wall 112 of the housing 1 and is used to cool the battery energy distribution unit. With the help of the heat dissipation device, the working heat of the internal electrical components of the BDU100 can be quickly dissipated to the outside, preventing heat accumulation, improving the working performance of each electrical component, and thus improving the working performance of the power battery.

[0083] There are various forms of heat dissipation devices. They can be air-cooled, such as fans, or water-cooled, such as heat pipes. This application also provides a specific embodiment of the heat dissipation device. In this embodiment, the bottom wall of the enclosure is a planar structure, and the heat dissipation device includes a cold plate. A thermally conductive adhesive layer is also disposed between the cold plate and the bottom wall of the enclosure. The thermally conductive adhesive layer facilitates the uniform diffusion of heat and improves heat dissipation efficiency.

[0084] In this embodiment, all electrical connectors in the circuit integration module also have a second connection port exposed outside the insulating base. All second connection ports in the same circuit integration module are assembled to form a port assembly. The housing 1 is provided with through holes so that the port assembly can be electrically connected to external electronic devices. As shown in the figure, the first circuit integration module 3 has a port assembly 35, the second circuit integration module 4 has a port assembly 44, and the third circuit integration module 5 has a port assembly 52. ​​The cover 12 of the housing 1 is provided with a first through hole 12a, a second through hole 12b, and a third through hole 12c. The port assembly 35 is opposite to the first through hole 12a, the port assembly 44 is opposite to the second through hole 12b, and the port assembly 52 is opposite to the third through hole 12c.

[0085] The power battery in this embodiment has the above-mentioned battery energy distribution unit, so the power battery also has the above-mentioned technical effects of the battery energy distribution unit.

[0086] For other structures of the power battery in the embodiments of this application, please refer to the prior art, which will not be described in detail here.

[0087] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after the connection.

[0088] The directional terms used in the embodiments of this application, such as "inner" and "outer," are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. Furthermore, unless otherwise stated in this application, "multiple" as used in this application refers to two or more.

[0089] In the description of embodiments of this application, the term "comprising" or any other variations thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0090] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A battery energy distribution unit, comprising the following components: Box; Multiple electrical components are disposed within the inner cavity of the enclosure; At least one circuit integration module includes an insulating substrate and at least two electrical connectors integrated on the insulating substrate, each of the electrical connectors having a first connection end; when the insulating substrate is installed in the housing, one of the first connection ends makes contact with a connection position of one of the electrical components to be configured as a signal acquisition circuit, a relay drive circuit, or a precharge circuit circuit.

2. The battery energy distribution unit according to claim 1, wherein, The line integration module includes a low-voltage line integration module and a high-voltage line integration module. The connection positions include a low-voltage connection position and a high-voltage connection position. The electrical connector of the low-voltage line integration module is electrically connected to the low-voltage connection position, and the electrical connector of the high-voltage line integration module is electrically connected to the high-voltage connection position.

3. The battery energy distribution unit according to claim 2, wherein, The low-voltage connection locations include multiple low-voltage signal acquisition locations and multiple relay drive connection locations. All electrical connectors in the same low-voltage line integration module are electrically connected to one of the multiple low-voltage signal acquisition locations; Alternatively, all electrical connectors in the same low-voltage line integration module are electrically connected to one of the multiple relay drive connection positions; Alternatively, some of the electrical connectors in the same low-voltage line integration module are electrically connected to the low-voltage signal acquisition positions in a one-to-one correspondence, and some of the electrical connectors are electrically connected to at least some of the relay drive connection positions in a one-to-one correspondence.

4. The battery energy distribution unit according to claim 3, wherein, At least one of the insulating substrates of the low-voltage line integrated module is integrally injection molded with the housing; Alternatively, the insulating substrate of the low-voltage line integrated module may be directly or indirectly positioned and connected to the inner wall of the enclosure.

5. The battery energy distribution unit according to any one of claims 1 to 4, wherein, The enclosure includes a main body and a cover, and the circuit integration module is integrated on both the main body and the cover.

6. The battery energy distribution unit according to claim 5, wherein, The line integration module includes a low-voltage line integration module and a high-voltage line integration module. The low-voltage line integration module is integrated into the cover, and the high-voltage line integration module is integrated into the box body. The electrical connector of the low-voltage line integration module is electrically connected to the low-voltage connection position in the connection position, and the electrical connector of the high-voltage line integration module is electrically connected to the high-voltage connection position in the connection position.

7. The battery energy distribution unit according to any one of claims 2 to 4, 6, wherein, The high-voltage connection locations include the high-voltage signal acquisition location and the pre-charge circuit connection location. All electrical connectors in the same high-voltage line integration module are electrically connected to one of the multiple high-voltage signal acquisition locations; Alternatively, all electrical connectors in the same high-voltage line integrated module are electrically connected to the pre-charge circuit connection position one-to-one. Alternatively, some of the electrical connectors in the high-voltage line integration module are electrically connected to the high-voltage signal acquisition location, and some of the electrical connectors are electrically connected to the pre-charge circuit connection location to achieve pre-charge circuit connection.

8. The battery energy distribution unit according to claim 7, wherein, The insulating substrate of the high-voltage line integrated module includes a support wall, which is integrally formed with the bottom wall of the enclosure or supported on the bottom wall of the enclosure. At least one installation station is provided on the support wall, and each installation station is installed in conjunction with one of the electrical components. Each first connection end is provided at the installation station.

9. The battery energy distribution unit according to claim 8, wherein, Several of the plurality of electrical components are connected to a high-voltage circuit, the high-voltage circuit including at least one conductive busbar, the electrical components connected to the high-voltage circuit being electrically connected through the conductive busbar, the conductive busbar being fixed to the bottom wall of the enclosure, the supporting wall having a clearance through hole, the connecting end of the conductive busbar passing through the through hole and being electrically connected to the corresponding electrical component.

10. The battery energy distribution unit according to claim 9, wherein, The conductive busbar is fixed to the outside of the bottom wall of the box, and the connecting end of the conductive busbar passes through the bottom wall of the box and is electrically connected to the corresponding electrical component in the high-voltage circuit.

11. The battery energy distribution unit according to any one of claims 1 to 10, wherein, It also includes a heat dissipation device, which is located on the outside of the bottom wall of the enclosure and is used to cool the battery energy distribution unit. The bottom wall of the enclosure has a planar structure, and the heat dissipation device includes a cold plate. A thermally conductive adhesive layer is also provided between the cold plate and the bottom wall of the enclosure.

12. The battery energy distribution unit according to any one of claims 1 to 11, wherein, All electrical connectors in the circuit integration module also have a second connection port exposed outside the insulating base. All the second connection ports in the same circuit integration module are gathered to form a port assembly. The housing is provided with through holes so that the port assembly can be electrically connected to external electronic devices.

13. A power battery, comprising: Battery casing; The battery energy distribution unit according to any one of claims 1 to 12, wherein the housing is located inside the battery housing or fixed to the outside of the battery housing.

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