Battery pack cutoff unit and battery pack charge-discharge control circuit

Abstract

The application provides a battery pack cut-off unit and a battery pack charging and discharging control circuit. The battery pack cut-off unit is used for controlling the charging and discharging of a battery pack. The battery pack cut-off unit comprises a positive high-voltage control box and a negative high-voltage control box, and the negative high-voltage control box is assembled with the positive high-voltage control box. The positive high-voltage control box is provided with a plurality of positive high-voltage terminals, and the negative high-voltage control box is provided with a plurality of negative high-voltage terminals, and the plurality of negative high-voltage terminals are electrically connected with the plurality of positive high-voltage terminals in correspondence. The battery pack charging and discharging control circuit comprises a battery pack, a controller, a high-voltage charging power supply and the above-mentioned battery pack cut-off unit. The battery pack cut-off unit has the advantages of strong generalization, few electrical components, low cost and more use scenarios.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobiles, in particular to a battery pack cut-off unit and a battery pack charging and discharging control circuit. BACKGROUND

[0002] The battery energy distribution unit (BDU), also known as the battery cut-off unit, is an important accessory in the high-voltage loop of a new energy vehicle. It is derived from the power distribution unit (PDU) of the power system. The BDU is directly connected to the power battery through a high-voltage plug-in, controls the charging and discharging process of the electric vehicle, and is a crucial component in the high-voltage loop. In the related art, the battery pack cut-off unit is composed of a protective cover, an upper cover, a bolt, a copper bar, a wire harness, an electrical device, a lower cover and other components, which has the following problems: (1) relatively low generalization, each project needs to be redesigned and developed; (2) many electrical components, complex assembly process, prone to errors, need special tooling fixtures, many production stations, relatively slow production rhythm, and subsequent full-automatic assembly cannot be realized; (3) cannot be arbitrarily laid out according to the space in the battery pack, and the use scene is limited. SUMMARY

[0003] The present application provides a battery pack cut-off unit and a battery pack charging and discharging control circuit which are highly universal, have few electrical components, are low in cost and have more use scenes.

[0004] The present application provides a battery pack cut-off unit for controlling the charging and discharging of a battery pack, comprising:

[0005] a positive high-voltage control box provided with a plurality of positive high-voltage terminals; and

[0006] a negative high-voltage control box assembled with the positive high-voltage control box; the negative high-voltage control box is provided with a plurality of negative high-voltage terminals, and the plurality of negative high-voltage terminals are correspondingly electrically connected with the plurality of positive high-voltage terminals.

[0007] Optionally, the positive high-voltage control box comprises a first assembly surface, and the plurality of positive high-voltage terminals are arranged on the first assembly surface; the negative high-voltage control box comprises a second assembly surface, and the plurality of negative high-voltage terminals are arranged on the second assembly surface; when the positive high-voltage control box and the negative high-voltage control box are assembled, the first assembly surface and the second assembly surface are in contact, and the plurality of negative high-voltage terminals and the plurality of positive high-voltage terminals are correspondingly electrically connected.

[0008] Optionally, the first assembly surface comprises a first side edge and a second side edge arranged oppositely; part of the plurality of positive high-voltage terminals are arranged relatively close to the first side edge, and the other positive high-voltage terminals are arranged relatively close to the second side edge.

[0009] Optionally, the plurality of positive high-voltage terminals comprise a positive high-voltage charging terminal, a positive high-voltage discharging terminal and a positive high-voltage fast charging terminal.

[0010] One of the positive high-voltage charging terminal, the positive high-voltage discharging terminal and the positive high-voltage fast charging terminal is arranged relatively close to the first side edge, and the other two are arranged relatively close to the second side edge; or

[0011] Two of the positive high-voltage charging terminal, the positive high-voltage discharging terminal and the positive high-voltage fast charging terminal are arranged relatively close to the first side edge, and the other one is arranged relatively close to the second side edge.

[0012] Optionally, the first assembly surface comprises a first side edge and a second side edge arranged oppositely; the second assembly surface comprises a third side edge and a fourth side edge arranged oppositely; the third side edge and the first side edge are located on the same side of the battery pack cutoff unit, and the fourth side edge and the second side edge are located on the same side of the battery pack cutoff unit; part of the plurality of negative high-voltage terminals are arranged relatively close to the third side edge, and the other negative high-voltage terminals are arranged relatively close to the fourth side edge.

[0013] Optionally, the plurality of negative high-voltage terminals comprise a negative high-voltage charging terminal, a negative high-voltage discharging terminal and a negative high-voltage fast charging terminal.

[0014] One of the negative high-voltage charging terminal, the negative high-voltage discharging terminal and the negative high-voltage fast charging terminal is arranged relatively close to the third side edge, and the other two are arranged relatively close to the fourth side edge; or

[0015] Two of the negative high-voltage charging terminal, the negative high-voltage discharging terminal and the negative high-voltage fast charging terminal are arranged relatively close to the third side edge, and the other one is arranged relatively close to the fourth side edge.

[0016] Optionally, the plurality of positive high-voltage terminals and the plurality of negative high-voltage terminals are electrically connected by at least one of plug-in connection, riveting and welding.

[0017] The application also provides a battery pack charging and discharging control circuit, comprising:

[0018] a battery pack;

[0019] a controller;

[0020] a high-voltage charging power supply; and

[0021] The battery pack cut-off unit according to any one of the preceding embodiments, which is connected with the battery pack, the controller and the high-voltage charging power supply.

[0022] Optionally, the plurality of positive high-voltage terminals include a positive high-voltage charging terminal, a positive high-voltage discharging terminal and a positive high-voltage fast charging terminal; the positive high-voltage charging terminal is connected with the positive terminal of the battery pack, the positive high-voltage discharging terminal is connected with the positive terminal of the controller, and the positive high-voltage fast charging terminal is connected with the positive terminal of the high-voltage charging power supply.

[0023] The plurality of negative high-voltage terminals include a negative high-voltage charging terminal, a negative high-voltage discharging terminal and a negative high-voltage fast charging terminal; the negative high-voltage charging terminal is connected with the negative terminal of the battery pack, the negative high-voltage discharging terminal is connected with the negative terminal of the controller, and the negative high-voltage fast charging terminal is connected with the negative terminal of the high-voltage charging power supply.

[0024] Optionally, the positive high-voltage control box of the battery pack cut-off unit is provided with a first control switch connected between the positive terminal of the battery pack and the positive terminal of the controller.

[0025] Optionally, the positive high-voltage control box of the battery pack cut-off unit is provided with a first fast charging control switch connected between the positive terminal of the battery pack and the positive terminal of the high-voltage charging power supply.

[0026] Optionally, the positive high-voltage control box of the battery pack cut-off unit is provided with a pre-charge branch connected between the positive terminal of the battery pack and the positive terminal of the controller.

[0027] Optionally, the positive high-voltage control box of the battery pack cut-off unit is provided with an overcurrent protection circuit connected between the positive terminal of the battery pack and the positive terminal of the controller.

[0028] Optionally, the negative high-voltage control box of the battery pack cut-off unit is provided with a second control switch connected between the negative terminal of the battery pack and the negative terminal of the controller.

[0029] Optionally, the negative high-voltage control box of the battery pack cut-off unit is provided with a second fast charging control switch connected between the negative terminal of the battery pack and the negative terminal of the high-voltage charging power supply.

[0030] Optionally, the negative high-voltage control box of the battery pack cut-off unit is provided with a current sensor connected between the negative terminal of the battery pack and the negative terminal of the controller.

[0031] The battery pack cut-off unit of the embodiment of the present application is provided with a positive electrode high-voltage control box and a negative electrode high-voltage control box, the negative electrode high-voltage control box is assembled with the positive electrode high-voltage control box, the positive electrode high-voltage control box is provided with a plurality of positive electrode high-voltage terminals, the negative electrode high-voltage control box is provided with a plurality of negative electrode high-voltage terminals, and the plurality of negative electrode high-voltage terminals are electrically connected with the plurality of positive electrode high-voltage terminals in correspondence. In this way, the battery pack cut-off unit is universalized and can be adapted to more projects without the need for re-design and development, thereby reducing development costs; the battery pack cut-off unit has fewer electrical components, simple assembly process and low error rate, and can realize fully automated assembly, thereby reducing assembly and maintenance costs; and the battery pack cut-off unit can be arranged with the positive electrode high-voltage control box and the negative electrode high-voltage control box in accordance with the positive and negative electrodes of the battery pack inside the battery pack, thereby having more use scenarios.

[0032] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present specification and serve to explain the principles of the present specification together with the specification.

[0034] Figure 1 Fig. 1 shows a structural schematic diagram of one embodiment of a positive electrode high-voltage control box of a battery pack cut-off unit of the present application;

[0035] Figure 2 Fig. 2 shows a structural schematic diagram of one embodiment of a negative electrode high-voltage control box of the battery pack cut-off unit of the present application;

[0036] Figure 3 Fig. 3 shows a circuit diagram of one embodiment of a battery pack charging and discharging control circuit of the present application;

[0037] Figure 4 Fig. 4 shows a schematic diagram of a first positive electrode high-voltage control box of an exemplary embodiment of the present application, wherein a pre-charging module is not assembled to a main module;

[0038] Figure 5 Fig. 5 shows a schematic diagram of the first positive electrode high-voltage control box of the exemplary embodiment of the present application, wherein the pre-charging module is in an assembled state; Figure 4 Fig. 6 shows a schematic diagram of the first positive electrode high-voltage control box of the exemplary embodiment of the present application, wherein the pre-charging module is in a disassembled state;

[0039] Figure 6 Fig. 7 shows an exploded view of the pre-charging module; Figure 4

[0040] Fig. 8 shows a side view of the positive electrode high-voltage control box; Figure 7 Figure 4 Fig. 9 shows a side view of the negative electrode high-voltage control box;

[0041] Figure 8 Figure 4 ​​An exploded view of the main module of the positive high voltage control box shown.

[0042] Figure 9 yes Figure 8 The bottom view of the upper shell of the main module shown;

[0043] Figure 10 yes Figure 8 The diagram shows the positional relationship between the relays and high-voltage copper busbars of the main module.

[0044] Figure 11 yes Figure 8 The bottom view of the main module after the high-voltage copper busbar is fixed to the lower housing is shown.

[0045] Figure 12 yes Figure 4 An exploded view of the positive high-voltage control box shown.

[0046] Figure 13 yes Figure 12 A schematic diagram of the low-voltage copper busbar and upper housing of the positive high-voltage control box shown;

[0047] Figure 14 yes Figure 12 A schematic diagram of the high-voltage copper busbar and lower housing of the positive high-voltage control box shown;

[0048] Figure 15 yes Figure 12 A schematic diagram of the assembled low-voltage copper busbar, high-voltage copper busbar, and relay of the positive high-voltage control box shown.

[0049] Figure 16 yes Figure 15 A schematic diagram of another embodiment of the assembly diagram shown;

[0050] Figure 17 This is a schematic diagram of a second positive high voltage control box according to an exemplary embodiment of this application;

[0051] Figure 18 yes Figure 17 A schematic diagram of the high-voltage copper busbar in the second type of positive high-voltage control box;

[0052] Figure 19 yes Figure 17 The top view shown is of the second type of positive high voltage control box excluding the upper housing;

[0053] Figure 20 This is a schematic diagram of the connection between the conductive connector and the smart fuse according to an exemplary embodiment of this application;

[0054] Figure 21 yes Figure 12 Top view excluding the upper housing and pre-charge module;

[0055] Figure 22 This is a top view of the positive high-voltage control box according to an exemplary embodiment of this application, excluding the upper housing and pre-charge module. Figure 21 In comparison, fuses have different specifications. Detailed Implementation

[0056] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this specification as detailed in the appended claims.

[0057] The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. The singular forms “a,” “the,” and “the” used in this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0058] It should be understood that although the terms first, second, third, etc., may be used in this specification to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this specification, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0059] The embodiments and implementation methods described in this specification will now be explained in detail.

[0060] The battery pack disconnection unit of this application can be used in vehicles or any other product.

[0061] This application provides a battery pack disconnection unit for controlling the charging and discharging of a battery pack. The battery pack disconnection unit includes a positive high-voltage control box and a negative high-voltage control box, which are assembled together. The positive high-voltage control box has multiple positive high-voltage terminals, and the negative high-voltage control box has multiple negative high-voltage terminals, which are electrically connected to the corresponding positive high-voltage terminals.

[0062] The battery pack disconnection unit of this application embodiment includes a positive high-voltage control box and a negative high-voltage control box, which are assembled together. The positive high-voltage control box has multiple positive high-voltage terminals, and the negative high-voltage control box has multiple negative high-voltage terminals, which are electrically connected to the corresponding positive high-voltage terminals. This configuration makes the battery pack disconnection unit highly versatile, adaptable to more projects, eliminating the need for redesign and development, thus reducing development costs. It also features fewer electrical components, a simpler assembly process, a lower error rate, and fully automated assembly, resulting in lower assembly and maintenance costs. Furthermore, the positive and negative high-voltage control boxes can be arbitrarily arranged inside the battery pack according to the positive and negative terminals, expanding its application scenarios.

[0063] This application provides a battery pack cut-off unit and a battery pack charge / discharge control circuit that are highly versatile, have fewer electrical components, lower cost, and are applicable to a wider range of scenarios. The battery pack cut-off unit and battery pack charge / discharge control circuit of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0064] See Figure 1 As shown, Figure 1 The diagram shown is a structural schematic of one embodiment of the positive high voltage control box 1000 of the battery pack cutoff unit of this application. Figure 2 The diagram shown is a structural schematic of one embodiment of the negative high-voltage control box 2000 of the battery pack disconnection unit of this application. The battery pack disconnection unit is used to control the charging and discharging of the battery pack. See also... Figure 1 and Figure 2As shown, the battery pack disconnection unit includes a positive high-voltage control box 1000 and a negative high-voltage control box 2000, which are assembled together. The positive high-voltage control box 1000 has multiple positive high-voltage terminals 100, and the negative high-voltage control box 2000 has multiple negative high-voltage terminals 200, which are electrically connected to the corresponding positive high-voltage terminals 100. In this embodiment, by setting up the positive high-voltage control box 1000 and the negative high-voltage control box 2000, the multiple positive high-voltage terminals 100 are integrated into the positive high-voltage control box 1000, and the multiple negative high-voltage terminals 200 are integrated into the negative high-voltage control box 2000, with the multiple negative high-voltage terminals 200 electrically connected to the corresponding positive high-voltage terminals 100. This configuration results in fewer components, higher integration, lower assembly difficulty, lower precision requirements, and lower assembly and maintenance costs for the battery pack disconnection unit. Furthermore, it is highly versatile and can adapt to more projects without requiring redesign and development, thus reducing development costs. With fewer electrical components, the assembly process is simple, the error rate is low, and fully automated assembly can be achieved, resulting in lower assembly and maintenance costs. The battery pack disconnection unit allows for the arbitrary placement of the positive high-voltage control box 1000 and the negative high-voltage control box 2000 within the battery pack, arbitrarily aligning them according to the positive and negative terminals, thus expanding its application scenarios.

[0065] See Figure 1 As shown, the positive high-voltage control box 1000 includes a first assembly surface 104, and a plurality of positive high-voltage terminals 100 are disposed on the first assembly surface 104. In this embodiment, the plurality of positive high-voltage terminals 100 are integrated into the first assembly surface 104 for ease of assembly and maintenance. See also Figure 2 As shown, the negative high-voltage control box 2000 includes a second assembly surface 204, on which multiple negative high-voltage terminals 200 are disposed. In this embodiment, the multiple negative high-voltage terminals 200 are integrated into the second assembly surface 204 for ease of assembly and maintenance. When the positive high-voltage control box 1000 and the negative high-voltage control box 2000 are assembled, the first assembly surface 104 and the second assembly surface 204 are arranged facing each other and in contact, and the multiple negative high-voltage terminals 200 are electrically connected to the multiple positive high-voltage terminals 100 respectively. This arrangement facilitates assembly and maintenance, and also ensures stable and reliable connection.

[0066] See Figure 1 and Figure 2As shown, multiple positive high-voltage terminals 100 and multiple negative high-voltage terminals 200 are electrically connected by at least one of the following connection methods: plugging, riveting, and welding. In this embodiment, the multiple positive high-voltage terminals 100 and multiple negative high-voltage terminals 200 are electrically connected by plugging. In some other embodiments, the multiple positive high-voltage terminals 100 and multiple negative high-voltage terminals 200 are electrically connected by riveting. In still other embodiments, the multiple positive high-voltage terminals 100 and multiple negative high-voltage terminals 200 are electrically connected by welding. This configuration simplifies the assembly process and improves stability.

[0067] See Figure 1 As shown, the first assembly surface 104 includes a first side 111 and a second side 112 disposed opposite to each other. A portion of the plurality of positive high-voltage terminals 100 are disposed relatively close to the first side 111, while the remaining positive high-voltage terminals 100 are disposed relatively close to the second side 112. In this embodiment, the first assembly surface 104 includes two long sides and two short sides disposed opposite to each other, with the length of the long side being larger than the length of the short side. The first side 111 and the second side 112 are the two short sides of the first assembly surface 104 disposed opposite to each other. A portion of the plurality of positive high-voltage terminals 100 are disposed relatively close to one of the short sides, while the remaining positive high-voltage terminals 100 are disposed relatively close to the other short side. This arrangement allows the plurality of positive high-voltage terminals 100 to be respectively disposed on the two short sides of the first assembly surface 104, facilitating connection to external components, resulting in a compact layout and convenient assembly or maintenance.

[0068] See Figure 1 As shown, the plurality of positive high-voltage terminals 100 include a positive high-voltage charging terminal 101, a positive high-voltage discharging terminal 102, and a positive high-voltage fast charging terminal 103. The positive high-voltage charging terminal 101 is used to connect to the positive terminal of the battery pack. The positive high-voltage discharging terminal 102 is used to connect to the positive terminal of the controller. The positive high-voltage fast charging terminal 103 is used to connect to the positive terminal of the high-voltage charging power supply.

[0069] In some embodiments, one of the positive high-voltage charging terminal 101, the positive high-voltage discharging terminal 102, and the positive high-voltage fast charging terminal 103 is positioned relatively close to the first side 111, while the other two are positioned relatively close to the second side 112. In this embodiment, the positive high-voltage charging terminal 101 is positioned relatively close to the first side 111, and the positive high-voltage discharging terminal 102 and the positive high-voltage fast charging terminal 103 are positioned relatively close to the second side 112. In other embodiments, the positive high-voltage discharging terminal 102 is positioned relatively close to the first side 111, and the positive high-voltage charging terminal 101 and the positive high-voltage fast charging terminal 103 are positioned relatively close to the second side 112. In still other embodiments, the positive high-voltage fast charging terminal 103 is positioned relatively close to the first side 111, and the positive high-voltage charging terminal 101 and the positive high-voltage discharging terminal 102 are positioned relatively close to the second side 112. This arrangement results in a compact layout, facilitating assembly and maintenance.

[0070] In some embodiments, two of the positive high-voltage charging terminal 101, positive high-voltage discharging terminal 102, and positive high-voltage fast charging terminal 103 are positioned relatively close to the first side 111, and the other is positioned relatively close to the second side 112. In some embodiments, the positive high-voltage charging terminal 101 and the positive high-voltage discharging terminal 102 are positioned relatively close to the first side 111, and the positive high-voltage fast charging terminal 103 is positioned relatively close to the second side 112. In other embodiments, the positive high-voltage charging terminal 101 and the positive high-voltage fast charging terminal 103 are positioned relatively close to the first side 111, and the positive high-voltage discharging terminal 102 is positioned relatively close to the second side 112. In still other embodiments, the positive high-voltage discharging terminal 102 and the positive high-voltage fast charging terminal 103 are positioned relatively close to the first side 111, and the positive high-voltage charging terminal 101 is positioned relatively close to the second side 112. This arrangement results in a compact layout, facilitating assembly and maintenance.

[0071] See Figure 2 As shown, the second assembly surface 204 includes a third side 211 and a fourth side 212 disposed opposite to each other. The third side 211 is located on the same side of the battery pack cutting unit as the first side 111, and the fourth side 212 is located on the same side of the battery pack cutting unit as the second side 112. See also Figure 2As shown, some of the multiple negative high-voltage terminals 200 are positioned relatively close to the third side 211, while the remaining negative high-voltage terminals 200 are positioned relatively close to the fourth side 212. In this embodiment, the second assembly surface 204 includes two long sides and two short sides arranged opposite each other, with the length of the long side being larger than the length of the short side. The third side 211 and the fourth side 212 are the two short sides of the second assembly surface 204 arranged opposite each other. Some of the multiple negative high-voltage terminals 200 are positioned relatively close to one of the short sides, while the remaining negative high-voltage terminals 200 are positioned relatively close to the other short side. This arrangement, with the multiple negative high-voltage terminals 200 respectively located on the two short sides of the second assembly surface 204, facilitates connection to external components, resulting in a compact layout and convenient assembly or maintenance.

[0072] See Figure 2 As shown, the multiple negative high-voltage terminals 200 include a negative high-voltage charging terminal 201, a negative high-voltage discharging terminal 202, and a negative high-voltage fast charging terminal 203. The negative high-voltage charging terminal 201 is used to connect to the negative terminal of the battery pack. The negative high-voltage discharging terminal 202 is used to connect to the negative terminal of the controller. The negative high-voltage fast charging terminal 203 is used to connect to the negative terminal of the high-voltage charging power supply.

[0073] In some embodiments, one of the negative high-voltage charging terminal 201, the negative high-voltage discharging terminal 202, and the negative high-voltage fast charging terminal 203 is positioned relatively close to the third side 211, while the other two are positioned relatively close to the fourth side 212. In this embodiment, the negative high-voltage charging terminal 201 is positioned relatively close to the third side 211, and the negative high-voltage discharging terminal 202 and the negative high-voltage fast charging terminal 203 are positioned relatively close to the fourth side 212. In other embodiments, the negative high-voltage discharging terminal 202 is positioned relatively close to the third side 211, and the negative high-voltage charging terminal 201 and the negative high-voltage fast charging terminal 203 are positioned relatively close to the fourth side 212. In still other embodiments, the negative high-voltage fast charging terminal 203 is positioned relatively close to the third side 211, and the negative high-voltage charging terminal 201 and the negative high-voltage discharging terminal 202 are positioned relatively close to the fourth side 212. This arrangement results in a compact layout, facilitating assembly and maintenance.

[0074] In some embodiments, two of the negative high-voltage charging terminal 201, negative high-voltage discharging terminal 202, and negative high-voltage fast charging terminal 203 are positioned relatively close to the third side 211, and the other is positioned relatively close to the fourth side 212. In some embodiments, the negative high-voltage charging terminal 201 and negative high-voltage discharging terminal 202 are positioned relatively close to the third side 211, and the negative high-voltage fast charging terminal 203 is positioned relatively close to the fourth side 212. In other embodiments, the negative high-voltage charging terminal 201 and negative high-voltage fast charging terminal 203 are positioned relatively close to the third side 211, and the negative high-voltage discharging terminal 202 is positioned relatively close to the fourth side 212. In still other embodiments, the negative high-voltage discharging terminal 202 and negative high-voltage fast charging terminal 203 are positioned relatively close to the third side 211, and the negative high-voltage charging terminal 201 is positioned relatively close to the fourth side 212. This arrangement results in a compact layout, facilitating assembly and maintenance.

[0075] See Figure 3 As shown, Figure 3 The diagram shown is a circuit diagram of one embodiment of the battery pack charge / discharge control circuit 300 of this application. (In conjunction with...) Figures 1 to 3 As shown, the battery pack charging and discharging control circuit 300 includes a battery pack 301, a controller 302, a high-voltage charging power supply 303, and the aforementioned components. Figure 1 The embodiment shows a positive high-voltage control box 1000 and a negative high-voltage control box 2000. Both the positive high-voltage control box 1000 and the negative high-voltage control box 2000 are connected to the battery pack 301, the controller 302, and the high-voltage charging power supply 303. The positive high-voltage charging terminal 101 is used to connect to the positive terminal of the battery pack 301. The positive high-voltage discharging terminal 102 is used to connect to the positive terminal of the controller 302. The positive high-voltage fast charging terminal 103 is used to connect to the positive terminal of the high-voltage charging power supply 303. The negative high-voltage charging terminal 201 is used to connect to the negative terminal of the battery pack. The negative high-voltage discharging terminal 202 is used to connect to the negative terminal of the controller. The negative high-voltage fast charging terminal 203 is used to connect to the negative terminal of the high-voltage charging power supply 303.

[0076] exist Figure 3 In the illustrated embodiment, the positive high-voltage control box 1000 of the battery pack disconnection unit is equipped with a first control switch Q1 (e.g., a main positive relay), connected between the positive terminal of the battery pack 301 and the positive terminal of the controller 302. The first control switch Q1 (e.g., a main positive relay) is used to control the connection and disconnection between the positive terminal of the battery pack 301 and the positive terminal of the controller 302. Figure 3In the illustrated embodiment, the positive high-voltage control box 1000 of the battery pack disconnection unit is equipped with a first fast-charging control switch Q2 (e.g., a fast-charging positive relay), connected between the positive terminal of the battery pack 301 and the positive terminal of the high-voltage charging power supply 303. The first fast-charging control switch Q2 (e.g., a fast-charging positive relay) is used to control the connection and disconnection between the positive terminal of the battery pack 301 and the positive terminal of the high-voltage charging power supply 303. Figure 3 In the illustrated embodiment, a pre-charge module 2 is provided within the positive high-voltage control box 1000 of the battery pack disconnection unit, connected between the positive terminal of the battery pack 301 and the positive terminal of the controller 302. In this embodiment, the pre-charge module 2 includes a pre-charge switch (e.g., a pre-charge relay 23) and a pre-charge resistor (e.g., a pre-charge resistor 24). The pre-charge switch (e.g., a pre-charge relay) can be a discharge pre-charge relay, used to control the on / off state of the pre-charge module 2. The pre-charge resistor (e.g., pre-charge resistor 24) can be a pre-charge resistor, serving a current-limiting function to limit the current of the pre-charge module 2, preventing excessive current from burning out the connected components. Figure 3 In the illustrated embodiment, the positive high-voltage control box 1000 of the battery pack disconnection unit is equipped with an overcurrent protection circuit 400, connected between the positive terminal of the battery pack 301 and the positive terminal of the controller 302. The overcurrent protection circuit 400 provides protection. The overcurrent protection circuit 400 (such as the aforementioned intelligent fuse 50) includes a fuse 7 and a PSS 8, which are connected in series between the positive terminal of the battery pack 301 and the positive terminal of the controller 302. When an overload or short-circuit current passes through the fuse 7, it melts due to its own heat, thereby disconnecting the circuit. When a serious overload, short circuit, or undervoltage fault occurs in this branch, the PSS 8 can automatically disconnect the circuit. The combined use of the fuse 7 and the PSS 8 ensures safety and reliability.

[0077] exist Figure 3 In the illustrated embodiment, a second control switch Q4 (e.g., a main negative relay) is provided within the negative high-voltage control box 2000 of the battery pack disconnection unit, connected between the negative terminal of the battery pack 301 and the negative terminal of the controller 302. The second control switch Q4 (e.g., the main negative relay) is used to control the connection and disconnection between the negative terminal of the battery pack 301 and the negative terminal of the controller 302. Figure 3 In the illustrated embodiment, a second fast-charging control switch Q5 (e.g., a fast-charging negative relay) is provided within the negative high-voltage control box 2000 of the battery pack disconnection unit, connected between the negative terminal of the battery pack 301 and the negative terminal of the high-voltage charging power supply 303. The second fast-charging control switch Q5 (e.g., a fast-charging negative relay) is used to control the connection and disconnection between the negative terminal of the battery pack 301 and the negative terminal of the high-voltage charging power supply 303. Figure 3In the illustrated embodiment, a current sensor S is provided in the negative high-voltage control box 2000 of the battery pack disconnection unit, connected between the negative terminal of the battery pack 301 and the negative terminal of the controller 302. The current sensor S can sense the information of the measured current and can transform the sensed information into an electrical signal or other required form of output that meets certain standards, according to a certain rule.

[0078] The battery pack charge / discharge control circuit 300 of this application embodiment, by setting... Figures 1 to 2 The battery pack cutting unit shown includes a positive high-voltage control box 1000 and a negative high-voltage control box 2000, which are assembled together. The positive and negative high-voltage control boxes 1000 and 2000 can be arbitrarily arranged according to the positive and negative terminals of the battery pack 301. This battery pack cutting unit offers high versatility, compatibility with multiple projects, reduced size, high space utilization, and is more suitable for automated production, thus reducing costs.

[0079] The following description, in conjunction with the accompanying drawings, describes the relevant structure of the positive high-voltage control box 1000. Those skilled in the art will understand that although the description uses the positive high-voltage control box 1000 as an example, based on the working principles of the relevant components of the positive high-voltage control box 1000 and the negative high-voltage control box 2000, some implementation methods of the positive high-voltage control box 1000 can also be applied to the negative high-voltage control box 2000. Therefore, in the description of the positive high-voltage control box 1000, the main relay is not explicitly distinguished as a main positive relay and a main negative relay; it is simply named as a relay. Similarly, the fast-charging relay is distinguished as a fast-charging positive relay and a fast-charging negative relay, both named as fast-charging relays.

[0080] See Figures 4 to 7 and combined Figure 3 As shown, the battery pack disconnection unit of this embodiment includes a main module 1 and a pre-charge module 2. The pre-charge module 2 is detachably assembled to the main module 1. The main module 1 includes a high-voltage copper busbar (not shown), a low-voltage copper busbar (not shown), and a first terminal 11 disposed on the high-voltage copper busbar. The pre-charge module 2 includes a pre-charge copper busbar (not shown) and a second terminal 21 disposed on the pre-charge copper busbar. When the pre-charge module 2 is assembled to the main module 1, the first terminal 11 is electrically connected to the second terminal 21 or the low-voltage copper busbar.

[0081] The pre-charging module 2 is detachably assembled to the main module 1. When a fault occurs and maintenance is required, the pre-charging module 2 can be disassembled for maintenance or replacement. The operation is simple and convenient, reducing maintenance costs. At the same time, when the pre-charging module 2 is not needed, it can be removed without occupying the space of the main module 1, thus avoiding the waste of space in the main module 1.

[0082] See Figure 5 and combined Figure 6 and Figure 7 As shown, the main module 1 has a hole 12. When the first terminal 11 is electrically connected to the second terminal 21, the end of the second terminal 21 is located inside the hole 12, which can help position the pre-charging module 2.

[0083] Optionally, the hole 12 can also be provided in the pre-charging module 2, and when the first terminal 11 is electrically connected to the second terminal 21, the end of the first terminal 11 is located in the hole 12.

[0084] One of the first terminal 11 and the second terminal 21 includes an elastic portion (not shown). When the pre-charge module 2 is assembled to the main module 1, the elastic portion is elastically deformed by the compressive force of the first terminal 11 or the second terminal 21 to increase the stability of the contact between the first terminal 11 and the second terminal 21; at the same time, it can also assist in positioning the pre-charge module 2.

[0085] Optionally, the elastic portion may be configured as one, with the end of the first terminal 11 or the end of the second terminal 21 located on one side of the elastic portion and pressing the elastic portion; the elastic portion may also be configured as multiple, with the end of the first terminal 11 or the end of the second terminal 21 located between multiple elastic portions and pressing multiple elastic portions.

[0086] Optionally, the first terminal 11 and the second terminal 21 can also be electrically connected via surface contact. One of the main module 1 and the pre-charge module 2 is provided with a positioning post, and the other with a positioning hole. When the pre-charge module 2 is assembled to the main module 1, the positioning post is received within the positioning hole, which assists in positioning the pre-charge module 2.

[0087] See Figure 6 As shown, the pre-charge module 2 includes a housing 22 and a pre-charge relay 23 and a pre-charge resistor 24 fixed to the housing 22. The pre-charge copper busbar is fixed to the housing 22. The pre-charge relay 23 includes a third terminal 231. The pre-charge resistor 24 includes a fourth terminal 241. The third terminal 231 and the fourth terminal 241 are electrically connected to the pre-charge copper busbar.

[0088] SeeFigure 6 and Figure 7 As shown, the pre-charge relay 23 includes a first retaining part 232. The housing 22 includes a second retaining part 221. The first retaining part 232 and the second retaining part 221 are fastened and fixed together, which facilitates the assembly of the pre-charge relay 23 and the housing 22; at the same time, no additional fixing structure is required for fixation, saving costs and reducing the weight of the battery pack disconnection unit, which meets the lightweight requirements of new energy vehicles; furthermore, it facilitates the replacement of the pre-charge relay 23.

[0089] The pre-charge relay 23 and the housing 22 can also be fixed by screws. The pre-charge resistor 24 and the housing 22 can be fixed by clips or screws.

[0090] The pre-charge copper busbar is integrally formed with the outer shell 22, which increases the stability between the pre-charge copper busbar and the outer shell 22; at the same time, no additional fixing structure is required for fixation, saving costs and reducing the weight of the battery pack cutting unit, which meets the lightweight requirements of new energy vehicles.

[0091] The third terminal 231 and the fourth terminal 241 are welded and fixed to the pre-charge copper busbar, increasing the stability between the pre-charge relay 23 and the pre-charge resistor 24 and the housing 22. The third terminal 231 and the fourth terminal 241 can also be electrically connected to the pre-charge copper busbar through surface contact.

[0092] See Figure 7 , Figure 5 and Figure 8 As shown, the main module 1 includes a lower housing 13. The lower housing 13 is provided with a first buckle 131. The outer housing 22 is provided with a second buckle 222. The first buckle 131 and the second buckle 222 are fastened and fixed together. The lower housing 13 and the outer housing 22 are easy to assemble, improving assembly efficiency; at the same time, no additional fixing structure is required for fixation, saving costs and reducing the weight of the battery pack cutting unit, which meets the lightweight requirements of new energy vehicles.

[0093] The lower housing 13 and the outer housing 22 can also be fixed together by screws.

[0094] See Figure 7As shown, the lower housing 13 has a groove 132. The first latch 131 is located within the groove 132. The outer housing 22 includes a protrusion 223. The second latch 222 is disposed at the end of the protrusion 223. When the pre-charging module 2 is assembled to the main module 1, the protrusion 223 slides along the groove 132 until the first latch 131 and the second latch 222 are fastened and fixed. The protrusion 223 and the groove 132 facilitate the alignment of the first latch 131 and the second latch 222, improving assembly efficiency.

[0095] See Figure 8 As shown, the main module 1 also includes an upper housing 14 and a relay 4. The high-voltage copper busbar 3 is integrally formed with the lower housing 13. The lower housing 13 is fixed to the upper housing 14 and together with the upper housing 14 form a receiving cavity 133. The relay 4 is located within the receiving cavity 133 and is fixed to the high-voltage copper busbar 3. The high-voltage copper busbar 3 includes a first contact portion 31. The relay 4 includes a second contact portion 41. The first contact portion 31 and the second contact portion 41 are electrically connected. The battery pack cutting unit of this embodiment has high stability, especially when the battery pack cutting unit is inverted, it effectively prevents the high-voltage copper busbar 3 from detaching from the lower housing 13, thereby improving the safety and reliability of the battery pack cutting unit.

[0096] The lower housing 13 and the upper housing 14 can be made of plastic. The lower housing 13 includes a first sidewall 134. The high-voltage copper busbar 3 is integrally formed with the first sidewall 134. The high-voltage copper busbar 3, the first sidewall 134, and the upper housing 14 form the receiving cavity 133. The lower housing 13 has a simple structure, saves costs, and reduces the weight of the battery pack cutting unit, meeting the lightweight requirements of new energy vehicles.

[0097] See Figure 8 As shown, the first contact part 31 is welded and fixed to the second contact part 41, which increases the stability of the relay 4 and the high voltage copper busbar 3. In particular, after the battery pack cut-off unit is inverted, it can effectively prevent the relay 4 from detaching from the high voltage copper busbar 3, thereby improving the safety and reliability of the battery pack cut-off unit.

[0098] The relay 4 includes a first latch 42, and the upper housing 14 includes a second latch 141. The first latch 42 and the second latch 141 are fastened and fixed together. The relay 4 and the upper housing 14 are easy to assemble, improving assembly efficiency. At the same time, no additional fixing structure is required, saving costs and reducing the weight of the battery pack cutting unit, which meets the lightweight requirements of new energy vehicles.

[0099] See Figure 10 and combined Figure 8As shown, the main module 1 includes at least one pair of relays 4. The pair of relays 4 includes a main relay 45 (e.g., a main positive relay) and a fast charging relay 46 (e.g., a fast charging positive relay). The first hook 42 of one of the relays 4 extends perpendicularly to the extension direction of the first hook 42 of the other relay 4, making the battery pack cut-off unit structure compact and saving space.

[0100] Each pair of relays 4 is electrically connected to the high-voltage copper busbar 3. Multiple high-voltage copper busbars 3 may be configured.

[0101] See Figure 9 and combined Figure 8 As shown, the upper housing 14 includes a connecting wall 142 and a second side wall 143 extending from the connecting wall 142. At least one pair of second hooks 141 are provided, one of which is located on the second side wall 143, and the other is located on the connecting wall 142. The connecting wall 142 and the second side wall 142 of the upper housing 14 are subjected to force respectively, thus protecting the upper housing 14.

[0102] See Figure 8 As shown, the lower housing 13 includes a third hook 135. The upper housing 14 includes a fourth hook 144. The third hook 135 and the fourth hook 144 are fastened and fixed together. The lower housing 13 and the upper housing 14 are easy to assemble, improving assembly efficiency; at the same time, no additional fixing structure is required for fixation, saving costs and reducing the weight of the battery pack cutting unit, which meets the lightweight requirements of new energy vehicles.

[0103] See Figure 8 As shown, optionally, the third hook 135 is disposed on the first side wall 134, and the fourth hook 144 is disposed on the second side wall 143. The third hook 135 and the fourth hook 144 are easy to process and form, reducing processing costs.

[0104] See also Figure 8 As shown, optionally, the first sidewall 134 is provided with a groove 1341. The third hook 135 is located within the groove 1341. The third housing 14 includes an extension 145 extending from the second sidewall 143. The fourth hook 144 is disposed at the end of the extension 145. When the lower housing 13 is assembled with the upper housing 14, the extension 145 slides along the groove 1341 until the third hook 135 and the fourth hook 144 are engaged and fixed. The provision of the extension 145 and the groove 1341 facilitates the alignment of the third hook 135 and the fourth hook 144, improving assembly efficiency.

[0105] The high-voltage copper busbar 3 is integrally formed with the lower housing 13. The first hook 42 and the second hook 141 are fastened and fixed to fix the relay 4 to the upper housing 14. The second contact portion 41 of the relay 4 is welded and fixed to the first contact portion 31 of the high-voltage copper busbar 3. The third hook 135 and the fourth hook 144 are fastened and fixed to fix the lower housing 13 to the upper housing 14.

[0106] See Figures 12 to 14 As shown, the battery pack cutting unit of this application also includes a low-voltage copper busbar 5 located in the space enclosed by the main module 1.

[0107] The upper housing 14 and the low-voltage copper busbar 5 are integrally injection molded, resulting in fast product molding and strong overall stability. The main module 1 and the high and low voltage copper busbars can also be installed separately, ensuring assembly feasibility and installation firmness.

[0108] See Figure 14 As shown, the high-voltage copper busbar 3 includes a plurality of eighth terminals 32 and a second fixing part 33 fixed to the main module 1. The eighth terminals 32 extend from the second fixing part 33 and are integrally stamped with the second fixing part 33.

[0109] See Figure 15 As shown, the low-voltage copper busbar 5 includes a plurality of fifth terminals 51 and a first fixing part 52 fixed to the main module 1. The fifth terminals 51 extend from the first fixing part 52 and are integrally stamped with the first fixing part 52. In one embodiment, the fifth terminals 51 protrude from the first fixing part 52 toward the upper housing 14, and a receiving cavity 146 is provided on the lower housing 14 to accommodate the fifth terminals 51. The receiving cavity 146 is as follows: Figure 12 As shown.

[0110] See Figure 15 As shown, the relay 4 includes multiple sixth terminals 43 and multiple seventh terminals 44. The fifth terminal 51 is electrically connected to the sixth terminal 43, and the seventh terminal 44 is electrically connected to the eighth terminal 32.

[0111] The second contact portion 41 is disposed on the seventh terminal 44.

[0112] In one embodiment, the sixth terminal 43 is the coil of the relay 4, which is made into a insert shape and extends protruding towards the low-voltage copper busbar 5. Correspondingly, the fifth terminal 51 includes a second elastic part 511. When the sixth terminal 43 is connected to the fifth terminal 51, the second elastic part 511 is elastically deformed by the squeezing force of the sixth terminal 43, thereby making the electrical connection between the low-voltage copper busbar 5 and the relay 4 more secure and the acquisition of relevant signals more stable. The sixth terminal 43 can also be set to other shapes, and the shape of the fifth terminal 51 needs to be changed accordingly to ensure the effectiveness of its electrical connection.

[0113] The seventh terminal 44 is also configured to extend and protrude towards the high-voltage copper busbar 3. Correspondingly, the eighth terminal 32 is provided with a connection hole 321. The seventh terminal 44 is inserted into the connection hole 321 to achieve electrical connection. The eighth terminal 32 can be configured the same as the fifth terminal 51, or it can be stamped into other shapes, such as a thin sheet protruding towards the seventh terminal 44.

[0114] See Figure 14 As shown, in another embodiment, the main module 1 is provided with a through hole, and correspondingly, the eighth terminal 32 is provided with a connection hole 321. See also Figure 15 As shown, the battery pack cut-off unit also includes a fixing member 6, which includes a blocking part 61 and a third fixing part 62 extending from the blocking part 61. The third fixing part 62 passes through the through hole and is fixed to the relay 4. At the same time, the third fixing part 62 is electrically connected to the seventh terminal 44, and the blocking part 61 abuts against the main module 1.

[0115] The fastener 6 can be a bolt, and correspondingly, the seventh terminal 44 is provided with a screw hole to mate with the bolt. The blocking part 61 is a nut, and the third fixing part 62 is a stud. The stud passes through the main module 1 and the high-voltage copper busbar 3 and is fixed to the screw hole, while also serving as a carrier for electrical connection.

[0116] See Figure 16 As shown, in other alternative embodiments, the low-voltage copper busbar 5 or the high-voltage copper busbar 3 can be simultaneously stamped with an external terminal 34 during molding. The external terminal 34 is pin-shaped, thus serving as a connector for electrical connection with the battery management system (BMS). Accordingly, the main module 1 is provided with a chamber for inserting the external connector, and the external terminal 34 is located within this chamber. As described above, since at least one of the high-voltage copper busbar 3 and the low-voltage copper busbar 5 on the high-voltage sampling board includes an external terminal 34 for electrical connection with the battery management system, and this external terminal 34 functions similarly to the terminals of a connector, an additional connector is not required, saving costs.

[0117] See Figure 3 A pair of relays 4 includes a main relay 45 (e.g., a main positive relay) and a fast-charging relay 46 (e.g., a fast-charging positive relay). The battery pack disconnect unit also includes a fuse 7 and a PSS (Pyro Safety Switch) 8. The electronic components in the positive high-voltage control box 1000, or the battery pack disconnect unit, work together to control the power-on / off process, pre-charging process, and charging process of the high-voltage electrical circuit.

[0118] This application also provides a battery pack including any of the above-described battery pack cut-off units. The pre-charge module 2 is easy to maintain, and when the pre-charge module 2 is not needed, it can be removed.

[0119] This application also provides a vehicle including the aforementioned battery pack, which improves the vehicle's safety and reliability.

[0120] This application electrically connects the high-voltage copper busbar 3 and the low-voltage copper busbar 5 to the relay 4 via multiple terminals. The use of an integrated copper busbar replaces the wiring harness and sampling terminals inside the traditional battery pack cutting unit, eliminating the need for manual installation of additional wiring harnesses. This allows for automated production of the battery pack cutting unit, reducing problems such as wiring wear, wiring errors, and low production efficiency. Furthermore, the high-voltage copper busbar 3 and the low-voltage copper busbar 5 are integrally injection molded with the upper housing 14 and the lower housing 13, respectively, eliminating the need to assemble the sampling copper busbar with the main module 1. This simplifies installation and saves costs. In addition, one of the high-voltage copper busbar 3 and the low-voltage copper busbar 5 is injection molded into the upper housing 14, and the other into the lower housing 13, achieving vertical spacing. Therefore, the battery pack cutting unit has fewer components, and the high-voltage copper busbar 3 and the low-voltage copper busbar 5, injection molded into different housings and arranged vertically, are easier to completely separate, improving or avoiding electromagnetic interference and increasing the reliability of the battery pack cutting unit.

[0121] Based on the technical inspiration derived from the above embodiments, where the high-voltage copper busbar 3 is injection molded onto the lower housing 13 and the low-voltage copper busbar 5 is injection molded onto the upper housing 14 to separate the high and low voltage, those skilled in the art will understand that in some embodiments, the high-voltage copper busbar 3 may not be injection molded onto the lower housing 13 but may still be injection molded (for ease of description, referred to as the high-voltage sampling plate), and / or, the low-voltage copper busbar 5 may not be injection molded onto the upper housing 14 but may still be injection molded (for ease of description, referred to as the low-voltage sampling plate). The following, in conjunction with... Figure 17 The implementation method is described in detail below:

[0122] Figure 17 The second type of positive high-voltage control box shown includes sampled electronic components, a high-voltage sampling board 60, and a low-voltage sampling board. The sampled electronic components may vary depending on the battery pack disconnection unit (e.g., the positive high-voltage control box 1000). Regardless of the battery pack disconnection unit, the sampled electronic components include high-voltage sampling points and / or low-voltage sampling points. That is, depending on the function of the electronic components, some electronic components (e.g., the main relay 45 (e.g., the main positive relay) and the fast-charging relay 46 (e.g., the fast-charging positive relay) include both high-voltage and low-voltage sampling points, while some electronic components only have either a high-voltage or a low-voltage sampling point. It should be noted that, as mentioned earlier, the low-voltage sampling board is injection molded onto the upper housing 14 of the positive high-voltage control box 1000, and the high-voltage sampling board can be injection molded onto the lower housing 13 of the positive high-voltage control box 1000. To illustrate the high-voltage sampling board... Figure 17 The high-voltage sampling plate is marked as 60, based on the same reasoning. Figure 17The low-voltage sampling board is not shown (because the low-voltage copper busbar 5 can be injection molded as a single unit with the upper housing 14), while Figure 17 The diagram illustrates the low-voltage copper busbar 5 of the low-voltage sampling board (the low-voltage copper busbar 5 is deliberately disassembled to understand the relationship between it and the upper housing 14). High-voltage sampling points refer to sampling points where high voltage needs to be collected, for example... Figure 17 The intelligent fuse 50, main relay 45, and fast-charging relay 46 each have high-voltage sampling points. Correspondingly, low-voltage sampling points refer to sampling points where low-voltage data needs to be collected; for example, the main relay 45 and the fast-charging relay 46 each have low-voltage sampling points. Of course, the high or low voltage, in some cases, also includes the collection of current, in addition to voltage. The high-voltage sampling board is equipped with a high-voltage copper busbar 3 electrically connected to the high-voltage sampling points to sample the corresponding electronic components. The structure of the high-voltage copper busbar 3 is not limited to the structure shown in the figure; it can replace the high-voltage wiring harness. Figure 18 In the middle, the high-voltage copper busbar 3 includes a first fuse connection terminal 118 and a second fuse connection terminal 119 for connection with the smart fuse 50, a first contact portion 31 for connection with the main relay 45, and a first contact portion 31 for connection with the fast-charging relay 46. In addition to these, in Figure 18 and combined Figure 19 In the process, the high-voltage copper busbar 3 may further include a first fixing point 1191 (for fixed connection with the pre-charge relay 23), a second fixing point 1192 (for fixed connection with the pre-charge resistor 24), a first positioning hole 1193, and a second positioning hole 1194. The low-voltage sampling board is provided with a low-voltage copper busbar 5 connected to the low-voltage sampling points to sample the corresponding electronic components. The structure of the low-voltage copper busbar 5 can be found in [reference needed]. Figure 13 and Figure 15 The low-voltage copper busbar 5 is connected to the main relay 45 and the fast-charging relay 46. The high-voltage sampling board 60 and the low-voltage sampling board are arranged vertically at intervals. The intervals can be such that one is directly above the other or one is diagonally above the other, as long as it can improve or avoid electromagnetic interference.

[0123] As described above, by replacing the high-voltage wiring harness with the high-voltage sampling board 60 and the low-voltage wiring harness with the low-voltage sampling board, the battery pack cutting unit (e.g., the positive high-voltage control box 1000) no longer needs wiring harnesses to connect to the corresponding high-voltage and low-voltage sampling points. Therefore, there is no problem of messy wiring harness arrangement, and problems such as poor wiring harness connection and wiring errors can be avoided from the source. This allows the battery pack cutting unit to achieve fully automated production, improves production efficiency, reduces costs, and increases fault tolerance. Furthermore, the high-voltage sampling board 60 and the low-voltage sampling board are arranged at intervals in the vertical direction, achieving complete separation of high and low voltage, reducing or avoiding electromagnetic interference, and making the battery pack cutting unit more reliable.

[0124] Based on the aforementioned technical concept of using a high-voltage sampling board 60 to replace the high-voltage wiring harness and a low-voltage sampling board to replace the low-voltage wiring harness, and vertically spacing them to reduce or avoid electromagnetic interference, the distance between the high-voltage sampling board 60 and the low-voltage sampling board can be determined according to actual conditions, as long as the interference can be avoided. Furthermore, based on the aforementioned technical inspiration, the high-voltage and low-voltage wiring harnesses within the negative high-voltage control box 2000 can also be replaced by high-voltage and low-voltage sampling boards respectively. That is, the relevant implementation methods for the positive high-voltage control box 1000 described below can also be applied to the negative high-voltage control box 2000.

[0125] In some embodiments, both the main relay 45 (e.g., a main positive relay) and the fast-charging relay 46 (e.g., a fast-charging positive relay) have the high-voltage sampling point and the low-voltage sampling point. The high-voltage sampling board 60 and the low-voltage sampling board are located on opposite sides of the main relay 45 and the fast-charging relay 46 (see reference). Figure 17 The low- and medium-voltage copper busbar 5 and the high-voltage sampling board 60 are positioned relative to the main relay 45 and the fast-charging relay 46 to achieve the vertically spaced arrangement.

[0126] As described above, since the high-voltage sampling board 60 and the low-voltage sampling board are located on opposite sides of the main relay 45 and the fast-charging relay 46 respectively, the vertical spacing arrangement avoids the problem of messy wiring harness arrangement, improves or avoids electromagnetic interference, and is conducive to the miniaturization of the battery pack cutting unit and the layout of other components.

[0127] In the embodiments of this application, the height difference generated by the interval between the high-pressure sampling plate 60 and the low-pressure sampling plate is H, where H ≥ 50 mm. The height difference generated by the interval arrangement causes the high-pressure sampling plate and the low-pressure sampling plate to be arranged vertically, meaning that one of the high-pressure sampling plate and the low-pressure sampling plate is above the other. This "above" can be directly above or offset and located diagonally above.

[0128] As described above, the height difference between the high-voltage sampling plate 60 and the low-voltage sampling plate is H, where H ≥ 50 mm. The greater distance between the high-voltage sampling plate and the low-voltage sampling plate can better avoid electromagnetic interference.

[0129] Please continue reading Figure 17 and combined Figure 20The positive high-voltage control box includes a smart fuse 50 and a main relay 45. The smart fuse 50 and the main relay 45 have the high-voltage sampling point. The high-voltage copper busbar 3 also includes a conductive connector 110, which is injection molded into the lower housing 13 and placed along the length of the vehicle body where the battery pack disconnect unit is installed. Those skilled in the art will understand that the conductive connector 110, as part of the high-voltage copper busbar, can be injection molded together with other high-voltage copper busbars to form a high-voltage sampling plate, or it can be... Figure 17 In this way, the other high-voltage copper busbars are injection molded into a high-voltage sampling plate, while the conductive connector 110 is separately injection molded into the lower housing 13. The length direction of the vehicle body refers to the direction from the front of the vehicle to the parking space. The conductive connector 110 is connected to the smart fuse 50 to realize the connection between the high-voltage sampling plate and the smart fuse 50.

[0130] As described above, since the conductive connector 110 is injection molded into the lower housing 13 and placed along the length of the vehicle body where the battery pack cut-off unit is installed, and the smart fuse 50 is located at the end of the battery pack cut-off unit, the connection between the conductive connector 110 and the smart fuse 50 enables the high-voltage sampling board to be connected to the smart fuse 50. This allows the battery pack cut-off unit to be easily arranged on the main positive side of the battery pack. This structure, combining the injection molding of one of the high-voltage sampling board and the low-voltage sampling board into the upper housing 14 and the other into the lower housing 13, makes the battery pack cut-off unit (e.g., the positive high-voltage control box 1000) compact and small in size.

[0131] Please see Figure 19 and combined Figure 17 In the second type of positive high-voltage control box, the lower housing 13 or the upper housing 14 includes parallel side plates. Figure 17 In this configuration, because the upper housing 14 functions similarly to a cover, the side panel is the first side wall 134. However, those skilled in the art will understand that the side panel can also be a side panel of the upper housing 14. The side panel (first side wall 134) is parallel to the width direction x of the vehicle body where the battery pack cutoff unit is installed, i.e., along the direction from the driver's seat to the passenger seat. The battery pack cutoff unit includes a smart fuse 50, a main relay 45, a fast-charging relay 46, a pre-charging resistor 24, and a pre-charging relay 23. (Combined with...) Figure 3 and combined Figure 19 and Figure 17As shown, the polarity of the main relay and the fast-charging relay are both positive or negative. More specifically, in the positive high-voltage control box 1000, the main relay is the main positive relay, and the fast-charging relay is the fast-charging positive relay, both with the same positive polarity. They are arranged in a row with the smart fuse 50 and the pre-charge relay, etc. In the negative high-voltage control box 2000, the main relay is the main negative relay, and the fast-charging relay is the fast-charging negative relay, both with negative polarity. In some embodiments, when the smart fuse 50 is located in the negative high-voltage control box 2000, the smart fuse 50 is arranged in a row with the main negative relay, the fast-charging negative relay, and the aforementioned components. The main relay 45 and the pre-charge relay 23 are arranged in a row along a direction perpendicular to the side plate (first side wall 134), located between the pre-charge resistor 24 and the fast-charging relay 46, and are arranged as a whole with the smart fuse 50, the pre-charge resistor 24, and the fast-charging relay 46 along the length direction of the side plate. Technicians can understand that, because the parts are of different sizes, they can be arranged along the length of the side plate with their centers on a straight line, or they can be arranged like... Figure 19 In this way, the parts can be staggered, but are confined between parallel side plates (first sidewall 134).

[0132] As described above, since the main relay 45 and the pre-charge relay 23 are arranged in a row along the direction perpendicular to the side plate and are located between the pre-charge resistor 24 and the fast-charge relay 46, and are arranged as a whole with the smart fuse 50, the pre-charge resistor 24 and the fast-charge relay 46 along the length direction of the side plate (first side wall 134), the battery pack cutting unit (e.g., the positive high voltage control box 1000) is small in size. For example, it can be set in a long strip shape as shown in the figure (the top view projection is rectangular, or, as shown in the figure, it is a rectangle with a missing corner), which is beneficial for the vehicle to accommodate more battery cells.

[0133] Please see Figure 21 and combined Figure 12 And see also Figure 22 Each of the positive high voltage control boxes includes a PSS 8 and a fuse 7. However, in some embodiments, only one of the PSS 8 and the fuse 7 is required. Figure 21 and Figure 12 The fuse 7 in the positive high voltage control box 1000 shown is a 400V fuse. Figure 20The fuse 7 of the positive high-voltage control box 1000 shown is an 800V fuse, but it is not limited to this, as long as the specifications are different. Furthermore, the positive high-voltage control box 1000 includes a main relay 45 (e.g., a main positive relay), a fast-charging relay 46 (e.g., a fast-charging positive relay), and a housing (e.g., including an upper housing 14 and a lower housing 13). The PSS 8, the fuse 7, the main relay 45, and the fast-charging relay 46 are located along the width direction of the vehicle body on which the battery pack disconnect unit is installed, within the housing (e.g., including an upper housing 14 and a lower housing 13). Figure 21 and Figure 22 The components are arranged within the first sidewall 134 of the lower housing 13 (for reference). The centers of at least one of the PSS 8 and the fuse 7, the main relay 45, and the fast-charging relay 46 are each located on the same straight line L. Taking the main relay 45, fast-charging relay 46, and PSS 8 as examples, in a top-view direction, the center of PSS 8 is its center O1. The main relay 45 and fast-charging relay 46 are cuboid in shape, and their top-view projections are rectangular, with their centers being the intersection of their diagonals. Thus, O1, O2, and O3 are on the same straight line. The width direction of the vehicle body is from the driver's seat towards the passenger seat. Of course, if the battery pack cutoff unit only includes PSS 8, then PSS 8, the main relay 45, and the fast-charging relay 46 are arranged within the housing. If the battery pack cutoff unit only includes fuse 7, then fuse 7, the main relay 45, and the fast-charging relay 46 are arranged within the housing. When the centers of each element are located on the same straight line L, the order of the elements is not limited. Figure 21 and Figure 22 The order described.

[0134] See Figure 3 and combined Figure 12 , Figure 21 and Figure 22 In the aforementioned positive high-voltage control box 1000, the polarity of the main relay 45 and the fast-charging relay 46 are both positive, and they are arranged in a row with the PSS 8 and the fuse 7, with their respective centers on the same straight line. Those skilled in the art will understand that in some embodiments, the PSS 8 and the fuse 7 can also be located in the negative high-voltage control box 2000, with their centers on the same straight line as the main relay (which is the main negative relay in this case) and the fast-charging relay (which is the fast-charging negative relay in this case).

[0135] As described above, since at least one of the PSS 8 and the fuse 7, the main relay 45 and the fast-charging relay 46 are arranged within the housing along the width direction of the vehicle body on which the battery pack disconnect unit is installed, and the centers of at least one of the PSS and the fuse, the main relay and the fast-charging relay are each located on the same straight line L, it is easier to make the positive high-voltage control box 1000 into a flat and elongated shape (e.g., Figure 21 and Figure 22 As shown, the rectangular shape of the battery pack cut-off unit (as depicted) is elongated and flat after installation on the vehicle body. This minimizes the space occupied by the unit along the length of the vehicle (from the front to the parking space), allowing for more battery cell components to be placed within the vehicle and improving its range. Furthermore, the fact that at least one of the PSS and the fuse, the main relay, and the fast-charging relay are all centered on the same straight line L facilitates the positioning and assembly of the components.

[0136] The aforementioned positive high-voltage control box 1000 includes a PSS 8 and a fuse 7. In this case, along the width direction of the vehicle body, the main relay 45, the fast-charging relay 46, the PSS 8, and the fuse 7 are arranged in sequence. Of course, they can also be interchanged. Figure 21 and Figure 22 The positions of the main relay 45 and the fast-charging relay 46 are such that the fast-charging relay 46, the main relay 45, the PSS 8, and the fuse 7 are arranged in sequence. In other embodiments, the positive high-voltage control box 1000 may also include one of the PSS 8 and the fuse. In this case, as... Figure 4 and Figure 5 As shown, along the width direction of the vehicle body, one of the main relay 45, the fast charging relay 46, the PSS 8, and the fuse 7 is arranged in sequence. Of course, they can also be interchanged. Figure 21 and Figure 22 The positions of the main relay 45 and the fast charging relay 46 are such that the fast charging relay 46, the main relay 45, the PSS 8, and the fuse 7 are arranged in sequence.

[0137] As described above, by arranging the components and having their centers on the same straight line L, the connecting wires (such as copper busbars) between the components are easier to route, making it easier for the positive high voltage control box to be elongated and flat.

[0138] Please see Figure 21 and Figure 22The housing includes two first sidewalls 134. The two first sidewalls 134 are parallel to each other along the width direction of the vehicle body. The housing also includes third sidewalls 136 located at both ends of the first sidewalls. The first sidewalls and the third sidewalls 136 enclose a space to accommodate at least one of the PSS 8 and the fuse 7, the main relay 45, and the fast-charging relay 46, such that the PSS 8 and at least one of the fuse 7, the main relay 45, and the fast-charging relay 46 are located between the first sidewalls. Alternatively, the two first sidewalls may not be... Figure 4 and Figure 5 So that all the lengths are equal. To clearly show the arrangement of the components, and that their centers lie on the same straight line L, Figure 21 and Figure 22 Part of the outer casing, such as the upper casing 14, is omitted, but those skilled in the art will understand that the first sidewall 134 is the plate on both sides of the positive high voltage control box, which extends along the width of the vehicle body and serves as part of the space.

[0139] As described above, since the housing includes two first sidewalls that are parallel to each other along the width of the vehicle body, and at least one of the PSS 8 and the fuse 7, the main relay 45 and the fast charging relay 46 are located between the first sidewalls, this ensures that the positive high voltage control box is elongated, resulting in a smaller space occupied by the battery pack cut-off unit in the length direction of the vehicle body (from the front of the vehicle to the parking space). Therefore, more battery cell components can be placed in the vehicle body, improving the vehicle's range.

[0140] Please continue reading Figure 21 and Figure 22 Both the main relay 45 and the fast charging relay 46 are rectangular parallelepipeds. In a top view, the longer side of the main relay (in...) Figure 21 and Figure 22 The first long side (marked as 451) and the long side of the fast charging relay (in) Figure 21 and Figure 22 The second longest side (marked as 461) is parallel, meaning that the main relay 45 and the fast charging relay 46 are arranged side by side along their respective lengths.

[0141] As described above, since the long side of the main relay and the long side of the fast charging relay are parallel in the top view, they are arranged side by side along the length direction, which makes the components more compact and the space utilization rate higher.

[0142] Please see Figure 21 and Figure 22 and combined Figure 3The positive high-voltage control box 1000 includes the fuse 7, and an insert 9 is injection-molded onto the outer casing. The injection position and / or structure of the insert 9 are determined according to the specifications of the fuse 7. Figure 21 and Figure 22 It is evident that the structure of the insert 9 differs between the 400V fuse 7 and the 800V fuse 7. The housing is provided with a mounting portion 91 opposite to the insert 9. The fuse 7 is assembled with the insert 9 and the mounting portion 91, and the position between the fuse 7 and the insert 9 is adjustable, and / or the position between the fuse 7 and the mounting portion 91 is adjustable. The method of achieving positional adjustability is not limited to the structure described below; a combination of a slide rail and a locking structure, etc., can be used.

[0143] As described above, since the injection position and / or structure of the insert 9 are determined according to the specifications of the fuse 7, for fuses of different specifications, only the corresponding insert 9 and the outer shell need to be injection molded. Different positive high voltage control boxes can use the same set of molds, saving costs. In addition, since the injection position of the insert 9 has been determined according to the specifications of the fuse 7, only the position of the fuse 7 needs to be finely adjusted. Therefore, this structure combined with the position adjustable feature makes it easier to assemble the fuse 7.

[0144] In some implementations, a clearer structure is shown in [reference needed]. Figure 21 The fuse 7 is provided with a first mounting hole 71, which is an elongated hole extending along the width direction of the vehicle body, such as an oblong hole. The positive high-voltage control box includes a fastener 92. The fastener 92 passes through the first mounting hole 71 to lock the fuse 7 and the insert 9, thereby achieving the assembly. The fastener 92 can be a bolt and nut combination, or a screw, which passes through the first mounting hole 71 and locks with the insert 9.

[0145] As described above, since the first mounting hole 71 is an elongated hole extending along the width direction of the vehicle body, and the fastener 92 passes through the first mounting hole 71 to lock the fuse 7 and the insert 9, the position of the fuse 7 can be adjusted by the fastener 92 being located at different positions within the first mounting hole 71, making the assembly of the fuse 7 more convenient.

[0146] Please see Figure 21 and Figure 22 In both the first and second positive high-voltage control boxes, the mounting portion 91 is a terminal post connected to the battery pack, and the fuse 7 is provided with a second mounting hole 72. The second mounting hole 72 is an elongated hole extending along the width direction of the vehicle body. The terminal post passes through the second mounting hole 72.

[0147] As described above, assembly and position adjustment are achieved by passing the pole through the second mounting hole 72. With the adjustable position of the fuse 7 and the insert 9, the position of the fuse 7 can be easily adjusted. In addition, using the pole connected to the battery pack as the mounting part reduces the number of components in the battery pack cut-off assembly and facilitates the arrangement of other components.

[0148] In some embodiments, the housing is injection molded with conductive connectors (not shown in the figure). The structure of the conductive connectors is not limited; for example, they can be copper busbars. At least one of the PSS 8 and the fuse 7, the main relay 45, and the fast-charging relay 46 are respectively connected via the conductive connectors. For example, the PSS 8 and the fast-charging relay 46 are connected via one conductive connector, and the PSS 8 and the main relay 45 are connected via another conductive connector, and so on.

[0149] As described above, by injection molding the conductive connector, at least one of the PSS 8 and the fuse 7, the main relay 45 and the fast charging relay 46 are connected to the battery pack cutoff assembly without wiring harness through the conductive connector. When at least one of the PSS 8 and the fuse 7, the main relay 45 and the fast charging relay 46 are arranged and their centers are located on the same straight line L, it is easier to connect the components electrically.

[0150] See Figure 3 and combined Figure 12 and Figure 17 Although the above example uses the positive high voltage control box 1000 and the negative high voltage control box 2000 as examples and each control box includes relevant components, technicians can immediately adopt the aforementioned implementation method without dividing the relevant components into the positive high voltage control box 1000 and the negative high voltage control box 2000. For example, the high voltage harness is replaced by the high voltage sampling board, the low voltage harness is replaced by the low voltage sampling board, and the high voltage sampling board and the low voltage sampling board are spaced apart to avoid electromagnetic interference.

[0151] On the other hand, embodiments of this application disclose a battery pack, which includes any of the aforementioned battery pack cutting units. The connection between the battery pack cutting unit and other components of the battery pack can employ any structure, and will not be elaborated further.

[0152] Furthermore, embodiments of this application disclose a vehicle comprising any of the aforementioned battery packs. The battery pack, along with other components, can be configured in any way, and will not be elaborated further.

[0153] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery pack disconnection unit for controlling the charging and discharging of a battery pack, characterized in that, include: Positive high voltage control box, wherein the positive high voltage control box is provided with multiple positive high voltage terminals; and A negative high-voltage control box is assembled with a positive high-voltage control box; the negative high-voltage control box is provided with a plurality of negative high-voltage terminals, and the plurality of negative high-voltage terminals are electrically connected to the plurality of positive high-voltage terminals respectively. The positive high-voltage control box includes a first assembly surface, and the plurality of positive high-voltage terminals are disposed on the first assembly surface; the negative high-voltage control box includes a second assembly surface, and the plurality of negative high-voltage terminals are disposed on the second assembly surface; when the positive high-voltage control box and the negative high-voltage control box are assembled, the first assembly surface and the second assembly surface are in contact, and the plurality of negative high-voltage terminals are electrically connected to the plurality of positive high-voltage terminals respectively; wherein, the plurality of positive high-voltage terminals and the plurality of negative high-voltage terminals are electrically connected by at least one connection method selected from plugging, riveting, and welding. The first assembly surface includes a first side and a second side that are disposed opposite to each other; some of the positive high voltage terminals are disposed relatively close to the first side, and the other positive high voltage terminals are disposed relatively close to the second side.

2. The battery pack cutting unit according to claim 1, characterized in that, The plurality of positive high-voltage terminals include a positive high-voltage charging terminal, a positive high-voltage discharging terminal, and a positive high-voltage fast charging terminal; One of the positive high-voltage charging terminal, the positive high-voltage discharging terminal, and the positive high-voltage fast charging terminal is disposed relatively close to the first side, and the other two are disposed relatively close to the second side; or Two of the positive high-voltage charging terminal, the positive high-voltage discharging terminal, and the positive high-voltage fast charging terminal are disposed relatively close to the first side, and the other is disposed relatively close to the second side.

3. The battery pack cutting unit according to claim 1, characterized in that, The first assembly surface includes a first side and a second side disposed opposite to each other; the second assembly surface includes a third side and a fourth side disposed opposite to each other; the third side and the first side are located on the same side of the battery pack cutting unit, and the fourth side and the second side are located on the same side of the battery pack cutting unit; some of the negative high-voltage terminals are disposed relatively close to the third side, and the other negative high-voltage terminals are disposed relatively close to the fourth side.

4. The battery pack cutting unit according to claim 3, characterized in that, The plurality of negative high-voltage terminals include negative high-voltage charging terminals, negative high-voltage discharging terminals, and negative high-voltage fast charging terminals. One of the negative high-voltage charging terminal, the negative high-voltage discharging terminal, and the negative high-voltage fast charging terminal is disposed relatively close to the third side, and the other two are disposed relatively close to the fourth side; or Two of the negative high-voltage charging terminal, the negative high-voltage discharging terminal, and the negative high-voltage fast charging terminal are positioned relatively close to the third side, and the other is positioned relatively close to the fourth side.

5. A battery pack charging and discharging control circuit, characterized in that, include: Battery pack; Controller; High-voltage charging power supply; and The battery pack cutting unit as described in any one of claims 1 to 4 is connected to the battery pack, the controller, and the high-voltage charging power supply.

6. The battery pack charge / discharge control circuit according to claim 5, characterized in that, The plurality of positive high-voltage terminals include a positive high-voltage charging terminal, a positive high-voltage discharging terminal, and a positive high-voltage fast charging terminal; the positive high-voltage charging terminal is connected to the positive terminal of the battery pack, the positive high-voltage discharging terminal is connected to the positive terminal of the controller, and the positive high-voltage fast charging terminal is connected to the positive terminal of the high-voltage charging power supply. The plurality of negative high-voltage terminals include a negative high-voltage charging terminal, a negative high-voltage discharging terminal, and a negative high-voltage fast charging terminal; the negative high-voltage charging terminal is connected to the negative terminal of the battery pack, the negative high-voltage discharging terminal is connected to the negative terminal of the controller, and the negative high-voltage fast charging terminal is connected to the negative terminal of the high-voltage charging power supply.

7. The battery pack charge / discharge control circuit according to claim 5 or 6, characterized in that, The positive high-voltage control box of the battery pack disconnection unit is equipped with a first control switch, which is connected between the positive terminal of the battery pack and the positive terminal of the controller; and / or The positive high-voltage control box of the battery pack disconnection unit is equipped with a first fast-charging control switch, which is connected between the positive terminal of the battery pack and the positive terminal of the high-voltage charging power supply; and / or The positive high-voltage control box of the battery pack disconnection unit is provided with a pre-charge branch, which is connected between the positive terminal of the battery pack and the positive terminal of the controller; and / or The positive high-voltage control box of the battery pack disconnection unit is equipped with an overcurrent protection circuit, which is connected between the positive terminal of the battery pack and the positive terminal of the controller; and / or The negative high-voltage control box of the battery pack disconnection unit is equipped with a second control switch, which is connected between the negative terminal of the battery pack and the negative terminal of the controller; and / or The negative high-voltage control box of the battery pack disconnection unit is equipped with a second fast-charging control switch, which is connected between the negative terminal of the battery pack and the negative terminal of the high-voltage charging power supply; and / or The negative high-voltage control box of the battery pack disconnection unit is equipped with a current sensor, which is connected between the negative terminal of the battery pack and the negative terminal of the controller.

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