Power battery high-voltage distribution box, power battery and vehicle

Abstract

The utility model discloses a power battery high-voltage distribution box, a power battery and a vehicle, and solves the technical problem of low safety in the use process of the power battery in the prior art. The power battery high-voltage distribution box comprises a shell, an electrical unit and more than one separator, the electrical unit is arranged in a cavity enclosed by the shell, the electrical unit comprises a copper bar assembly and more than one relay, and the relay is provided with a first conductive terminal and a second conductive terminal; the more than one separator comprises a connecting part and a separating part which are connected with each other, the connecting part is connected with the lower shell, the separating part comprises a vertical arm and a transverse arm which are arranged at an angle, and an area enclosed by the vertical arm and the transverse arm covers the first conductive terminal and / or the second conductive terminal so as to separate the first conductive terminal from the second conductive terminal. The electrical gap between the first conductive terminal and the second conductive terminal can be increased, the risk that the first conductive terminal and the second conductive terminal are communicated in a humid environment is reduced, and the electrical safety is improved.

Description

Technical Field

[0001] This application belongs to the technical field of distribution boxes, and particularly relates to a high-voltage power distribution box for power batteries, a power battery, and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, the power battery technology has become increasingly mature. The high-voltage power distribution box (hereinafter referred to as BDU) inside the battery is a unit for energy distribution and control of the power battery. Electrical components need to be integrally arranged in the battery distribution box. During the use of the power battery, due to the relatively high humidity inside the distribution box, there may be a risk of electric leakage, which may cause problems in the reliable use and safety of the power battery. Summary of the Invention

[0003] To solve the technical problems regarding safety during the use of current power batteries, this application provides a high-voltage power distribution box for power batteries, a power battery, and a vehicle.

[0004] In the first aspect of this application, a high-voltage power distribution box for power batteries is provided, including:

[0005] A housing, including an upper housing and a lower housing, and the upper housing and the lower housing enclose a cavity;

[0006] An electrical unit, disposed in the cavity, and the electrical unit includes a copper busbar assembly and more than one relay. The relay is provided with a first conductive terminal for the input circuit and a second conductive terminal for the output circuit;

[0007] More than one isolating member, including a connecting portion and an isolating portion connected to each other. The connecting portion is connected to the lower housing, and the isolating portion includes a vertical arm and a horizontal arm arranged at an angle. The area enclosed by the vertical arm and the horizontal arm covers the first conductive terminal and / or the second conductive terminal to separate the first conductive terminal and the second conductive terminal.

[0008] In some embodiments, the isolating portion is L-shaped or T-shaped;

[0009] The vertical arm of the isolating portion is located between the first conductive terminal and the second conductive terminal;

[0010] The horizontal arm of the isolating portion is connected to both the connecting portion and the vertical arm.

[0011] In some embodiments, the relay is further provided with an outer shell plate for isolating the first conductive terminal and the second conductive terminal;

[0012] The vertical arm of the isolating portion is provided with a slot for cooperating with the outer shell plate.

[0013] In some embodiments, the number of the relays is four, namely a main positive relay, a fast charge positive relay, a main negative relay, and a fast charge negative relay;

[0014] The main positive relay and the fast charge positive relay are arranged in parallel along the width direction of the housing, and the outer shell plates of the main positive relay and the fast charge positive relay are located on the same straight line;

[0015] The main negative relay and the fast charge negative relay are arranged in parallel along the width direction of the housing, and the outer shell plates of the main negative relay and the fast charge negative relay are located on the same straight line.

[0016] In some embodiments, there are two isolation members. The vertical arm of one isolation member is inserted between the outer shell plates of the main positive relay and the fast charge positive relay; the vertical arm of the other isolation member is inserted between the outer shell plates of the main negative relay and the fast charge negative relay.

[0017] In some embodiments, the isolation member is integrally formed, and the material of the isolation member is an insulating material.

[0018] In some embodiments, the upper housing is provided with heat dissipation grilles;

[0019] The lower housing is provided with a mounting position for mounting the connecting portion. The connecting portion is provided with a connecting hole, and the lower housing is provided with a corresponding mounting hole. The connecting portion and the lower housing are connected by a fastener passing through the connecting hole and the mounting hole.

[0020] In some embodiments, the electrical unit further includes a fuse, a Hall current sensor, and a shunt current sensor;

[0021] The copper busbar assembly includes a first copper busbar connecting the fuse and the Hall current sensor, a first copper busbar and a second copper busbar connecting the Hall current sensor and the main positive relay, a third copper busbar connecting the main positive relay and the fast charge positive relay, a fourth copper busbar connecting the shunt current sensor and the main negative relay, and a fifth copper busbar connecting the main negative relay and the fast charge negative relay.

[0022] In a second aspect of the present application, there is provided a power battery including the power battery high-voltage distribution box as described above.

[0023] In a third aspect of the present application, there is provided a vehicle including the power battery as described above.

[0024] A high-voltage power distribution box for a power battery, a power battery, and a vehicle provided according to one or more embodiments of the present application. The high-voltage power distribution box for a power battery includes a housing, an electrical unit, and more than one isolation member. The housing includes an upper housing and a lower housing, and the upper housing and the lower housing enclose a cavity. The electrical unit is disposed in the cavity and includes a copper busbar assembly and more than one relay. The relay is provided with a first conductive terminal for an input circuit and a second conductive terminal for an output circuit. The more than one isolation member includes a connecting portion and an isolating portion that are connected to each other. The connecting portion is connected to the lower housing, and the isolating portion includes a vertical arm and a horizontal arm that are arranged at an angle. The area enclosed by the vertical arm and the horizontal arm covers the first conductive terminal and / or the second conductive terminal to separate the first conductive terminal and the second conductive terminal. The area enclosed by the vertical arm and the horizontal arm covers the first conductive terminal and / or the second conductive terminal to separate the first conductive terminal and the second conductive terminal. The isolating portion of the isolation member covers the first conductive terminal and / or the second conductive terminal, thereby separating the first conductive terminal and the second conductive terminal. The electrical clearance between the first conductive terminal and the second conductive terminal can be increased, the risk of connection between the first conductive terminal and the second conductive terminal in a humid environment can be reduced, and the electrical safety can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structural schematic diagram of the high-voltage power distribution box for a power battery in one or more embodiments of the present application is shown.

[0026] Figure 2 Shows Figure 1 The structural schematic diagram of the electrical unit and the lower housing.

[0027] Figure 3 Shows Figure 1 The structural schematic diagram of the first conductive terminal and the second conductive terminal of

[0028] Figure 4 Shows Figure 1 The structural schematic diagram of the isolation member of

[0029] Figure 5 Shows Figure 1 The explosion diagram of the isolation member and the electrical unit of

[0030] Figure 6 Shows Figure 1 The side view of the isolation member and the electrical unit of

[0031] Figure 7 Shows Figure 1 The side view after the isolation member and the electrical unit of are matched.

[0032] Figure 8 Shows Figure 1 The structural schematic diagram of the electrical unit of

[0033] Description of reference numerals: 100-power battery high-voltage distribution box, 110-housing, 111-upper housing, 112-lower housing, 113-radiation grille, 120-electrical unit, 121-fuse, 122-Hall current sensor, 123-shunt current sensor, 124-main positive relay, 1241-housing plate, 125-fast charging positive relay, 126-main negative relay, 127-fast charging negative relay, 128-copper busbar assembly, 1281-first copper busbar, 1282-first The second copper bar, 1283-the third copper bar, 1284-the fourth copper bar, 1285-the fifth copper bar, 1286-the sixth copper bar, 1287-the seventh copper bar, 129-the first conductive terminal, 1290-the second conductive terminal, 130-the isolating piece, 131-the connecting part, 1311-the connecting hole, 132-the isolating part, 1321-the vertical arm, 13211-the slot, 1322-the horizontal arm; 140-the charging positive electrode, 141-the discharging positive electrode, 142-the discharging negative electrode, 143-the charging negative electrode. DETAILED DESCRIPTION

[0034] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] See also Figure 1 , Figure 2 , Figure 3 and Figure 8 According to a first aspect of the present application, there is provided a power battery high-voltage distribution box, wherein the power battery high-voltage distribution box 100 comprises a shell 110, an electrical unit 120 and one or more isolating members 130, wherein the shell 110 comprises an upper shell 111 and a lower shell 112, wherein the upper shell 111 and the lower shell 112 are enclosed together to form a cavity; the electrical unit 120 is disposed in the cavity, wherein the electrical unit 120 comprises a copper busbar assembly 128 and one or more relays, wherein the relays are provided with a first conductive terminal 129 for an input circuit and a second conductive terminal 1290 for an output circuit; the isolating member 130 comprises a connecting portion 131 and an isolating portion 132 which are interconnected, wherein the connecting portion 131 is connected to the lower shell 112, and the isolating portion 132 comprises a vertical arm 1321 and a horizontal arm 1322 which are arranged at an angle, wherein an area enclosed by the vertical arm 1321 and the horizontal arm 1322 is covered on the first conductive terminal 129 and / or the second conductive terminal 1290 to separate the first conductive terminal 129 from the second conductive terminal 1290.

[0036] like Figure 1As shown, the housing 110 includes an upper housing 111 and a lower housing 112. The cavity structure formed by the upper housing 111 and the lower housing 112 forms a cavity for accommodating the electrical unit 120.

[0037] As Figure 3 shown, the electrical unit 120 includes a busbar assembly 128 and more than one relay. Since the relay has at least two conductive terminals, one of the conductive terminals is the first conductive terminal 129 of the input circuit, and the other conductive terminal is the second conductive terminal 1290 for the output circuit; since there may be a humid situation inside the high-voltage power distribution box 100 of the power battery, there is a risk that the first conductive terminal 129 and the second conductive terminal 1290 may be connected in a humid environment. Therefore, a separator 130 is provided between the first conductive terminal 129 and the second conductive terminal 1290. The isolation part 132 of the separator 130 includes a vertical arm 1321 and a horizontal arm 1322 arranged at an angle. The area surrounded by the vertical arm 1321 and the horizontal arm 1322 covers the first conductive terminal 129 and / or the second conductive terminal 1290 to separate the first conductive terminal 129 and the second conductive terminal 1290. The isolation part 132 of the separator 130 covers the first conductive terminal 129 and / or the second conductive terminal 1290, thereby separating the first conductive terminal 129 and the second conductive terminal 1290, reducing the risk of connection between the first conductive terminal 129 and the second conductive terminal 1290 in a humid environment.

[0038] Thus, the separator 130 covers the first conductive terminal 129 and / or the second conductive terminal 1290, thereby separating the first conductive terminal 129 and the second conductive terminal 1290, which can increase the electrical clearance between the first conductive terminal 129 and the second conductive terminal 1290 and improve electrical safety.

[0039] In some embodiments, as shown in the appended Figure 4 and the appended Figure 5 figures, the isolation part 132 is L-shaped or T-shaped; when the isolation part 132 is L-shaped, the horizontal arm 1322 and the vertical arm 1321 of the isolation part 132 enclose a covering area to cover the first conductive terminal 129 or the second conductive terminal 1290, thereby separating the first conductive terminal 129 and the second conductive terminal 1290. In other embodiments, when the isolation part 132 is T-shaped, the horizontal arm 1322 and the vertical arm 1321 of the isolation part 132 enclose two covering areas to cover the first conductive terminal 129 and the second conductive terminal 1290 respectively, thereby separating the first conductive terminal 129 and the second conductive terminal 1290. Electrical safety is improved.

[0040] In some embodiments, as shown in the appended Figure 4 and the appended Figure 5As shown, the vertical arm 1321 of the isolation part 132 is located between the first conductive terminal 129 and the second conductive terminal 1290. Thus, the cover area formed by the horizontal arm 1322 and the vertical arm 1321 of the isolation part 132 can cover the first conductive terminal 129 and / or the second conductive terminal 1290.

[0041] In some embodiments, as shown in the appendix Figure 4 As shown, the horizontal arm 1322 of the isolation part 132 is connected to both the connecting part 131 and the vertical arm 1321, improving the structural stability of the isolator 130.

[0042] In some embodiments, as shown in the appendix Figure 5 As shown, the relay further includes a housing plate 1241 for isolating the first conductive terminal 129 and the second conductive terminal 1290. The housing plate 1241 can isolate the first conductive terminal 129 and the second conductive terminal 1290 to a certain extent. The cover area surrounded by the vertical arm 1321 and the horizontal arm 1322 of the isolation part 132 isolates the first conductive terminal 129 and / or the second conductive terminal 1290, with a better isolation effect and further improving electrical safety.

[0043] In some embodiments, as shown in the appendix Figure 6 As shown, the vertical arm 1321 of the isolation part 132 is provided with a slot 13211 that cooperates with the housing plate 1241, so that the housing plate 1241 of the relay is disposed in the isolator 130, making the structure more compact on the premise of improving electrical safety.

[0044] In some embodiments, as shown in the appendix Figure 2 and the appendix Figure 5 As shown, the number of relays is four, namely the main positive relay 124, the fast charge positive relay 125, the main negative relay 126, and the fast charge negative relay 127. The main positive relay 124 and the fast charge positive relay 125 are arranged in parallel along the width direction of the housing 110, and the housing plates 1241 of the main positive relay 124 and the fast charge positive relay 125 are on the same straight line. The main negative relay 126 and the fast charge negative relay 127 are arranged in parallel along the width direction of the housing 110, and the housing plates 1241 of the main negative relay 126 and the fast charge negative relay 127 are on the same straight line. The 4 relays are arranged in two pairs in parallel, with a compact structure.

[0045] In some embodiments, as shown in the appendix Figure 2 and the appendix Figure 5As shown, there are two spacers 130. The vertical arm 1321 of one spacer 130 is inserted into the outer shell plate 1241 of the main positive relay 124 and the outer shell plate 1241 of the fast charging positive relay 125; the vertical arm 1321 of the other spacer 130 is inserted into the outer shell plate 1241 of the main negative relay 126 and the outer shell plate 1241 of the fast charging negative relay 127. Only one spacer 130 is needed to isolate the first conductive terminal 129 and the second conductive terminal 1290 of the main positive relay 124 and to isolate the first conductive terminal 129 and the second conductive terminal 1290 of the fast charging positive relay 125. The other spacer 130 can isolate the first conductive terminal 129 and the second conductive terminal 1290 of the main negative relay 126 and isolate the first conductive terminal 129 and the second conductive terminal 1290 of the fast charging negative relay 127. On the premise of ensuring electrical safety, the number of spacers 130 is small and the structure is compact.

[0046] In some embodiments, the spacer 130 is integrally formed, and the material of the spacer 130 is an insulating material. In certain embodiments, the spacer 130 can be an injection-molded plastic spacer 130. Setting the plastic spacer 130 between the first conductive terminal 129 and the second conductive terminal 1290 can increase the electrical clearance between the first conductive terminal 129 and the second conductive terminal 1290 and improve electrical safety.

[0047] In some embodiments, as shown in the appendix Figure 1 As shown, the upper housing 111 is provided with a heat dissipation grille 113, which can realize the air circulation between the inside of the power battery high-voltage distribution box 100 and the inside of the battery pack, realize the heat dissipation of the power battery high-voltage distribution box 100, meet the heat dissipation requirements of the distribution box under normal fast charging conditions, and the cost is low.

[0048] In other embodiments, as shown in the appendix Figure 3 As shown, in order to facilitate the installation of the spacer 130 on the lower housing 112, the lower housing 112 is provided with an installation position for installing the connecting portion 131. The connecting portion 131 is provided with a connecting hole 1311, and the lower housing 112 is provided with corresponding installation holes. The connecting portion 131 and the lower housing 112 are connected by fasteners passing through the connecting hole 1311 and the installation holes.

[0049] In some embodiments, as shown in the appendix Figure 2 As shown, the electrical unit 120 further includes a fuse 121, a Hall current sensor 122, and a shunt current sensor 123; by setting current sensors with two sampling principles, a redundant design of the current sampling function is realized, and the functional safety level is improved. In certain embodiments, the fuse 121 can be an intelligent fuse 121, which can be actively fused or passively fused to form a main and passive insurance, improving the safety performance.

[0050] In some embodiments, as shown in Figure 2 and Figure 8 shown, the copper busbar assembly 128 includes a first copper busbar 1281 connecting the fuse 121 and the Hall current sensor 122, a first copper busbar 1281 and a second copper busbar 1282 connecting the Hall current sensor 122 and the main positive relay 124, a third copper busbar 1283 connecting the main positive relay 124 and the fast charge positive relay 125, a fourth copper busbar 1284 connecting the shunt current sensor 123 and the main negative relay 126, and a fifth copper busbar 1285 connecting the main negative relay 126 and the fast charge negative relay 127. The copper busbar assembly 128 can be a busbar or a high-voltage copper busbar. The electrical units 120 are connected through the copper busbar assembly 128 to form a power consumption loop.

[0051] In some embodiments, as shown in Figure 2 and Figure 8 shown, in some embodiments, the positive circuit of the power battery high-voltage distribution box 100 connects the module positive electrode to the discharge positive electrode 141 and the charge positive electrode 140. The fuse 121, the Hall current sensor 122, the main positive relay 124, and the fast charge positive relay 125 are arranged in sequence on the path. The fast charge positive relay 125 is connected to the charge positive electrode 140 through a sixth copper busbar 1286.

[0052] In some embodiments, as shown in Figure 2 and Figure 8 shown, the negative circuit of the power battery high-voltage distribution box 100 connects the module negative electrode to the discharge negative electrode 142 and the charge negative electrode 143. The shunt current sensor 123, the main negative relay 126, and the fast charge negative relay 127 are arranged in sequence on the path. The fast charge negative relay 127 is connected to the charge negative electrode 143 through a seventh copper busbar 1287.

[0053] The present application provides an embodiment of the second aspect, a power battery including the above-mentioned power battery high-voltage distribution box 100. This power battery adopts the above-mentioned power battery high-voltage distribution box 100. For the specific structure of this power battery, refer to the above embodiments. Since all the technical solutions of the above embodiments are adopted, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0054] The present application provides an embodiment of the third aspect, a vehicle including the above-mentioned power battery. This vehicle adopts the above-mentioned power battery. For the specific structure of this power battery, refer to the above embodiments. Since all the technical solutions of the above embodiments are adopted, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0055] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0056] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0057] In this application, unless otherwise clearly specified or limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] In addition, in this application, the descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "a plurality" is two or more unless otherwise clearly and specifically limited.

[0059] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of this application, and the scope of this application is defined by the claims and their equivalents.

Claims

1. A power battery high voltage distribution box, characterized in that: include: A shell, comprising an upper shell and a lower shell, wherein the upper shell and the lower shell together form a cavity; An electrical unit is disposed in the cavity, the electrical unit comprises a copper busbar assembly and one or more relays, the relays are provided with a first conductive terminal for an input circuit and a second conductive terminal for an output circuit; One or more isolating members include a connecting portion and an isolating portion that are connected to each other, wherein the connecting portion is connected to the lower shell, and the isolating portion includes a vertical arm and a horizontal arm that are arranged at an angle, and the area enclosed by the vertical arm and the horizontal arm is covered on the first conductive terminal and / or the second conductive terminal to separate the first conductive terminal from the second conductive terminal.

2. The power battery high voltage distribution box according to claim 1, characterized in that: The isolation portion is L-shaped or T-shaped; The vertical arm of the isolation portion is located between the first conductive terminal and the second conductive terminal; The horizontal arm of the isolation part is connected to both the connecting part and the vertical arm.

3. The power battery high voltage distribution box according to claim 2, characterized in that: The relay is also provided with a housing plate for isolating the first conductive terminal from the second conductive terminal; The vertical arm of the isolation part is provided with a slot matched with the outer shell plate.

4. The power battery high voltage distribution box according to claim 3, characterized in that: There are four relays, namely a main positive relay, a fast charging positive relay, a main negative relay and a fast charging negative relay; The main positive relay and the fast charging positive relay are arranged in parallel along the width direction of the housing, and the outer shell plate of the main positive relay and the outer shell plate of the fast charging positive relay are located on the same straight line; The main negative relay and the fast charging negative relay are arranged side by side along the width direction of the shell, and the outer shell plate of the main negative relay and the outer shell plate of the fast charging negative relay are located on the same straight line.

5. The power battery high voltage distribution box according to claim 4, characterized in that: There are two isolating members, wherein the vertical arm of one isolating member is inserted into the outer shell plate of the main positive relay and the outer shell plate of the fast charging positive relay; the vertical arm of the other isolating member is inserted into the outer shell plate of the main negative relay and the outer shell plate of the fast charging negative relay.

6. The power battery high voltage distribution box according to any one of claims 1 to 5, characterized in that: The isolating element is integrally formed, and is made of insulating material.

7. The power battery high voltage distribution box according to any one of claims 1 to 5, characterized in that: The upper housing is provided with a heat dissipation grille; The lower shell is provided with an installation position for installing the connecting part, the connecting part is provided with a connecting hole, the lower shell is provided with a corresponding mounting hole, and the connecting part and the lower shell are connected by a fastener penetrating the connecting hole and the mounting hole.

8. The power battery high voltage distribution box according to any one of claims 1 to 5, characterized in that: The electrical unit also includes a fuse, a Hall current sensor, and a shunt current sensor; The copper bar assembly includes a first copper bar connecting the fuse and the Hall current sensor, a first copper bar and a second copper bar connecting the Hall current sensor and the main positive relay, a third copper bar connecting the main positive relay and the fast charging positive relay, a fourth copper bar connecting the shunt current sensor and the main negative relay, and a fifth copper bar connecting the main negative relay and the fast charging negative relay.

9. A power battery, characterized in that: It comprises a power battery high voltage distribution box as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the power battery as claimed in claim 9.

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