Battery pack, preparation method thereof and power supply system

Abstract

The invention belongs to the technical field of power supply equipment, and particularly provides a battery pack, a preparation method thereof and a power supply system. The battery pack comprises a box body, the box body is provided with a positive electrode interface and a negative electrode interface, the positive electrode interface and the negative electrode interface are both connected with electric connectors, the electric connectors of the positive electrode interface and the negative electrode interface are both plug-in type connectors, the battery pack is further provided with a fuse box, and the fuse box is installed between the positive electrode interface and the negative electrode interface of the box body. The power supply system comprises the battery pack. The preparation method of the battery pack comprises the following steps: mounting the plug-in type connector at the lock bolt connector mounting position of the original battery pack and mounting the fuse box at the original MSD mounting position. The battery pack does not need to be configured with an MSD, and the fuse box is configured by using the original MSD installation space, so that a fuse with a larger size can be configured under the condition of the same battery pack volume.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery equipment, and in particular relates to a battery pack and a preparation method thereof, and a power supply system. Background Art

[0002] The locking bolt connector is a connector that uses bolts to press the conductive plates together to achieve contact and conduction. It has strong vibration resistance and good reliability and is widely used in automotive power battery packs. Conventional battery packs using locking bolt connectors are as follows: Figure 1 As shown, in order to ensure the safety of installation and maintenance personnel, battery packs using locking bolt connectors 100 often need to be equipped with MSD 300 (manual maintenance switch) at the positive or negative pole, and the high-voltage electrical circuit of the electrode is connected and disconnected by operating the plug-in element of MSD 300. However, when the battery pack has an insulation failure and the vehicle body is energized, there is still a risk of electric shock even if one pole of high voltage is disconnected. If MSD 300 is installed at both the positive and negative poles, it is difficult to control the volume of the battery pack, resulting in an excessively large volume of the battery pack.

[0003] In addition, in order to play a short-circuit protection role, battery packs equipped with MSDs are generally equipped with fuses in the MSD. However, as the power supply system develops in the direction of high voltage and high current, the size of the corresponding fuses is also increasing, which will inevitably lead to an increase in the overall size of the MSD, and it is also difficult to control the volume of the battery pack. Summary of the invention

[0004] The object of the present invention is to provide a battery pack to solve the technical problem in the prior art that the battery pack using a locking bolt connector needs to be configured with an MSD, and thus it is difficult to configure a large-sized fuse due to the MSD occupying the battery pack size. The object of the present invention is also to provide a method for preparing a battery pack to solve the same technical problem as above. The object of the present invention is also to provide a power supply system to solve the same technical problem as above.

[0005] To achieve the above purpose, the technical solution of the battery pack provided by the present invention is:

[0006] A battery pack includes a box body, the box body is provided with a positive electrode interface and a negative electrode interface, the positive electrode interface and the negative electrode interface are both connected to an electrical connector, the electrical connectors of the positive electrode interface and the negative electrode interface are both plug-in connectors, the plug-in connectors include a plug and a socket, the battery pack is also configured with a fuse box, the fuse box is installed between the positive electrode interface and the negative electrode interface of the box body.

[0007] The beneficial effect is: the present invention improves the battery pack in the prior art, and the battery pack is equipped with a plug-in connector. When maintenance is required, the plug and socket of the plug-in connector can be separated, thereby disconnecting the entire battery pack from the outside, that is, the plug-in connector takes over the circuit-breaking function of the MSD, so there is no need to use the MSD, and the safety fuse box can be configured at the installation position of the original battery pack MSD. Compared with the prior art, this achieves the configuration of a larger fuse box with the same battery pack volume.

[0008] As a further improvement, the plug includes a plug body, and the socket includes a socket body. The plug body is provided with a plug connecting part for fixedly connected to the socket body, and the socket body is provided with a socket connecting part for cooperating with the plug connecting part. The plug connecting part and the socket connecting part are connected by bolts, and at least one bolt mounting hole is respectively provided on the plug connecting part and the socket connecting part.

[0009] The beneficial effect is that when in use, the plug and the socket are plugged together, and the contact terminals of the plug and the socket are in contact to achieve electrical connection. Then, a locking bolt is passed through the plug connection part and the socket connection part to lock the plug and the socket. Compared with the prior art, this is equivalent to adding a locking structure, which significantly improves the connection stability of the plug and the socket.

[0010] As a further improvement, the plug-in connector also includes a positioning structure, which includes a plug positioning structure arranged on the plug body and a socket positioning structure arranged on the socket body, the plug positioning structure and the socket positioning structure are positioned and cooperated with each other, and the socket positioning structure and / or the socket positioning structure includes an indicating structure for indicating the tightness of the connection between the plug connecting part and the socket connecting part.

[0011] The beneficial effect is that when installing the plug and the socket, the indicator structure can be observed to identify whether the plug is installed in place and the tightness of the fit between the plug and the socket. On the premise that the plug is installed in place, the locking bolt can be tightened to ensure reliable contact between the plug and the socket, and prevent relative movement between the plug and the socket when the bolt is tightened, causing accidental damage to the plug or the socket.

[0012] As a further improvement, the socket positioning structure includes a positioning protrusion, and the plug positioning structure includes a positioning hole, and the positioning protrusion is used to be inserted and positioned with the positioning hole.

[0013] The beneficial effects are: firstly, the cooperation between the positioning hole and the positioning protrusion can prevent the positive and negative poles from being confused; in addition, the positioning protrusion can also support the plug, making it easier to screw the bolts.

[0014] As a further improvement, the upper protrusion height of the positioning protrusion is equal to the hole depth of the positioning hole used for matching therewith, and the indicating structure is formed by the upper surface of the positioning protrusion.

[0015] The beneficial effect is that after the plug is installed in place, the positioning protrusion is flush with the plug connection part with the positioning hole, so that the upper surface of the positioning protrusion can be directly observed to determine whether the plug is in place, and the positioning protrusion will not protrude as a whole after installation, which also has better aesthetics.

[0016] As a further improvement, the fuse box includes a base and an upper cover fixedly connected to the base to enclose a fuse setting cavity, the base is provided with two connection points for connecting with two contacts of the fuse, the fuse box is also provided with a protective cover, the protective cover is located in the fuse setting cavity, the protective cover includes a cover surface for covering the connection points and a connecting portion for connecting to the base.

[0017] The beneficial effect is that after the upper cover is opened for maintenance, the protective cover serves as a second line of protection against electric shock. The maintenance personnel need to remove the protective cover before disassembling and assembling the insurance, thereby improving the safety protection effect of the disassembly and assembly operation.

[0018] As a further improvement, the base is provided with a connecting groove, the connecting point is arranged in the connecting groove, and the connecting portion includes a connecting structure for connecting to a side wall of the connecting groove.

[0019] The beneficial effect is that the side wall can also play a protective role, and the protective cover and the side wall can be used together to simplify the structure of the protective cover. In addition, for the side wall formed integrally with the base, the connection risk point close to the live part of the fuse is reduced, ensuring a good protective effect.

[0020] As a further improvement, the protective cover also has a supporting portion for supporting the upper cover.

[0021] The beneficial effect is that the protective cover not only plays a protective role, but also plays a supporting role, thereby improving the overall strength of the battery pack. When the battery pack is accidentally squeezed, the protective cover can also serve as a force transmission member to transmit the deformation pressure to the fuse box base, thereby improving the safety protection performance.

[0022] To achieve the above object, the technical solution of the power supply system provided by the present invention is:

[0023] A power supply system includes at least two battery packs connected in series or parallel, at least one battery pack includes a box, the box is provided with a positive electrode interface and a negative electrode interface, both the positive electrode interface and the negative electrode interface are connected to an electrical connector, the electrical connectors of the positive electrode interface and the negative electrode interface are both plug-in connectors, the plug-in connector includes a plug and a socket, the battery pack is also configured with a fuse box, the fuse box is installed between the positive electrode interface and the negative electrode interface of the box.

[0024] The beneficial effect is: the present invention proposes a power supply system including a battery pack equipped with a fuse box and a plug-in connector. The battery pack is equipped with a plug-in connector. When maintenance is required, the plug and socket of the plug-in connector can be separated, thereby disconnecting the entire battery pack from the outside, that is, the plug-in connector takes over the circuit-breaking function of the MSD. At this time, there is no need to install the MSD, and the safety fuse box can be configured using the installation position of the original battery pack MSD. Compared with the prior art, this achieves the configuration of a larger fuse box with the same battery pack volume.

[0025] As a further improvement, the plug includes a plug body, and the socket includes a socket body. The plug body is provided with a plug connecting part for fixedly connected to the socket body, and the socket body is provided with a socket connecting part for cooperating with the plug connecting part. The plug connecting part and the socket connecting part are connected by bolts, and at least one bolt mounting hole is respectively provided on the plug connecting part and the socket connecting part.

[0026] The beneficial effect is that when in use, the plug and the socket are plugged together, and the contact terminals of the plug and the socket are in contact to achieve electrical connection. Then, a locking bolt is passed through the plug connection part and the socket connection part to lock the plug and the socket. Compared with the prior art, this is equivalent to adding a locking structure, which significantly improves the connection stability of the plug and the socket.

[0027] As a further improvement, the plug-in connector also includes a positioning structure, which includes a plug positioning structure arranged on the plug body and a socket positioning structure arranged on the socket body, the plug positioning structure and the socket positioning structure are positioned and cooperated with each other, and the socket positioning structure and / or the socket positioning structure includes an indicating structure for indicating the tightness of the connection between the plug connecting part and the socket connecting part.

[0028] The beneficial effect is that when installing the plug and the socket, the indicator structure can be observed to identify whether the plug is installed in place and the tightness of the fit between the plug and the socket. On the premise that the plug is installed in place, the locking bolt can be tightened to ensure reliable contact between the plug and the socket, and prevent relative movement between the plug and the socket when the bolt is tightened, causing accidental damage to the plug or the socket.

[0029] As a further improvement, the socket positioning structure includes a positioning protrusion, and the plug positioning structure includes a positioning hole, and the positioning protrusion is used to be inserted and positioned with the positioning hole.

[0030] The beneficial effects are: firstly, the cooperation between the positioning hole and the positioning protrusion can prevent the positive and negative poles from being confused; in addition, the positioning protrusion can also support the plug, making it easier to screw the bolts.

[0031] As a further improvement, the upper protrusion height of the positioning protrusion is equal to the hole depth of the positioning hole used for matching therewith, and the indicating structure is formed by the upper surface of the positioning protrusion.

[0032] The beneficial effect is that after the plug is installed in place, the positioning protrusion is flush with the plug connection part with the positioning hole, so that the upper surface of the positioning protrusion can be directly observed to determine whether the plug is in place, and the positioning protrusion will not protrude as a whole after installation, which also has better aesthetics.

[0033] As a further improvement, the fuse box includes a base and an upper cover fixedly connected to the base to enclose a fuse setting cavity, the base is provided with two connection points for connecting with two contacts of the fuse, the fuse box is also provided with a protective cover, the protective cover is located in the fuse setting cavity, the protective cover includes a cover surface for covering the connection points and a connecting portion for connecting to the base.

[0034] The beneficial effect is that after the upper cover is opened for maintenance, the protective cover serves as a second line of protection against electric shock. The maintenance personnel need to remove the protective cover before disassembling and assembling the insurance, thereby improving the safety protection effect of the disassembly and assembly operation.

[0035] As a further improvement, the base is provided with a connecting groove, the connecting point is arranged in the connecting groove, and the connecting portion includes a connecting structure for connecting to a side wall of the connecting groove.

[0036] The beneficial effect is that the side wall can also play a protective role, and the protective cover and the side wall can be used together to simplify the structure of the protective cover. In addition, for the side wall integrally formed with the base, the connection risk point close to the live part of the fuse is reduced, ensuring a good protective effect.

[0037] As a further improvement, the protective cover also has a supporting portion for supporting the upper cover.

[0038] The beneficial effect is that the protective cover not only plays a protective role, but also plays a supporting role, thereby improving the overall strength of the battery pack. When the battery pack is accidentally squeezed, the protective cover can also serve as a force transmission member to transmit the deformation pressure to the fuse box base, thereby improving the safety protection performance.

[0039] To achieve the above-mentioned purpose, the technical solution of the method for preparing a battery pack provided by the present invention is:

[0040] A method for preparing a battery pack comprises modifying a battery pack box having positive and negative electrodes equipped with locking bolt connectors and an MSD therebetween, removing the locking bolt connectors and the MSD at the positive and negative electrodes, and obtaining a required standby box, or directly using a standby box of the same model as the battery pack box having positive and negative electrodes equipped with locking bolt connectors and an MSD therebetween, installing plug-in connectors at the positive and negative electrode connector installation positions on the standby box, respectively, and installing a fuse box at a position corresponding to the original MSD between the positive and negative electrode plug-in connectors.

[0041] The beneficial effect is that the present invention provides a method for preparing a battery pack box that can utilize an existing locking bolt connector. The positive and negative electrodes of the battery pack obtained by this method are plug-in connectors. Utilizing the good insulation and anti-finger contact performance of the plug-in connector, when a fault requires maintenance, the plug of the plug-in connector can be directly unplugged, thereby eliminating the MSD, and the fuse box is installed exactly at the installation position of the original MSD, so that a larger-sized fuse can be arranged while the overall volume of the battery pack remains unchanged. In addition, for large-scale production, the present invention does not require a significant adjustment of the battery mold, so it also has the advantage of low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the structure of a battery pack using a locking bolt connector in the prior art;

[0043] Figure 2 This is a schematic structural diagram of Example 1 of the battery pack of the present invention;

[0044] Figure 3 It is a schematic diagram of the structure of other battery packs that are connected together with the battery pack embodiment 1 of the present invention to form a power supply system;

[0045] Figure 4 for Figure 2 Schematic diagram of the structure explosion of the connector;

[0046] Figure 5 for Figure 2 The structural diagram of the fuse box;

[0047] Figure 6 for Figure 3 Schematic diagram of the structure of the middle cover.

[0048] Description of reference numerals:

[0049] 100, locking bolt connector; 200, plug-in connector; 300, MSD; 400, fuse box; 500, cover; 201, plug body; 202, locking bolt; 203, plug connection part; 204, positioning hole; 205, threaded hole; 206, connecting boss; 207, plug-in part; 208, positioning protrusion; 209, guide key; 210, socket body; 401, upper cover; 402, first protective cover; 403, first fuse; 404, first waterproof ring; 405, base; 406, second protective cover; 407, second fuse; 408, connecting groove; 501, second waterproof ring. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with embodiments.

[0051] In order to solve the Figure 1 The problem that it is difficult to set a larger-sized fuse in the battery pack using the lock bolt connector 100 shown in the figure, the basic technical concept of the present invention is to replace the lock bolt connector 100 with a plug-in connector, and take advantage of the anti-touch finger and good insulation performance of the plug-in connector. When maintenance is required, the plug and socket of the plug-in connector can be directly separated to disconnect the battery pack from the external system, so there is no need to configure the MSD in the battery pack. Therefore, compared with the battery pack in the prior art, the fuse box can be configured at the original installation position of the MSD, thereby realizing the installation of a large-sized fuse.

[0052] Specific embodiment 1 of the battery pack provided by the present invention:

[0053] The battery pack provided in this embodiment is as follows Figure 2 As shown, the box body includes a positive electrode interface and a negative electrode interface. Both the positive electrode interface and the negative electrode interface are provided with a plug-in connector 200, and a fuse box 400 is also provided on the box body. Specifically, the fuse box 400 is installed between the plug-in connectors 200 of the positive electrode interface and the negative electrode interface.

[0054] Compared with the prior art, this is equivalent to directly utilizing the position of the MSD in the battery pack that originally used the locking bolt connector to configure the fuse box, thereby ensuring that a larger fuse is configured with the same volume as the original battery pack.

[0055] The modification preparation method of this embodiment: When preparing a battery pack, the battery pack using a locking bolt connector can be modified, that is, the locking bolt connector and MSD of the original battery pack are removed to form a standby box, and then the plug-in connector is installed at the positive and negative connector installation positions, and the installation position of the MSD in the original battery pack is configured to install a fuse box to play a short-circuit protection role. Compared with the prior art, this realizes the installation of a larger fuse without making major changes to the battery pack as a whole, which is convenient for batch modification and has a low production cost.

[0056] Direct preparation method of this embodiment: This embodiment can also directly utilize the battery pack box of the same model as the original locking bolt connector, that is, the standby box that has not yet installed the locking bolt connector and MSD. The plug-in connector can be directly installed at the positive and negative connector installation positions, and the fuse box can be installed at the installation position of the MSD.

[0057] The fuse box 400 configured in this embodiment can refer to Figure 5 , mainly including a base 405 and an upper cover 401. The base 405 can be connected to the inner wall of the battery pack case by screws, and it has a sealing fitting portion for sealing with the inner wall of the case, and a first waterproof ring 404 is provided on the sealing fitting portion. The upper cover 401 can be connected to the outer wall of the battery pack case by screws, and it has a sealing fitting portion for sealing with the outer wall of the case. The base 405 and the upper cover 401 together enclose a fuse setting cavity for installing the fuse. Two connection points for connecting the contact blades of the fuse are provided on the base 405. The contact blades at both ends of the fuse are connected to the conductive columns provided at the two connection points using fastening screws to achieve the connection between the fuse and the battery pack circuit.

[0058] Since there is no need to configure MSD, fuses of different sizes can be installed on base 405. Figure 5 , fuses of different sizes can be configured on the base 405, such as a first fuse 403 and a second fuse 407, to support 750V and 1000V high voltage platforms.

[0059] In order to improve the protection performance of the fuse box, this embodiment also adds a protective cover to the fuse box, such as Figure 5 The first protective cover 402 and the second protective cover 406 are insulating protective covers, which have a cover surface for covering the connection points of the base, and play the role of overall shielding and covering the connection points. After the fuse is installed, the protective cover can be connected to the base 405 and fixed on the base 405, that is, the protective cover should also have a connection portion for connecting with the base 405.

[0060] The provision of the protective cover in this embodiment is equivalent to adding a protective layer, thereby improving the overall protective performance of the fuse box.

[0061] In addition, in this embodiment, the base 405 is provided with a connection groove 408, which forms a connection point of the base 405 for connecting with the contact blade of the fuse, or the connection point is arranged in the connection groove 408. In this way, the connection groove 408 itself can also play a protective role. The protective cover is used to connect with the side wall of the connection groove 408, and cooperates with the connection groove 408 to play a protective role. In this case, the protective cover does not need to be large in size and has a simple structure. Moreover, the side wall of the connection groove 408 can also be integrally formed with the base 405, so that there is no connection seam near the contact blade of the fuse, reducing the risk point of protection failure.

[0062] As an optional solution, in this embodiment, the protective cover also has a supporting portion for supporting the upper cover 401. For example, the upper portion of the protective cover can directly contact the upper cover 401. In this way, the protective cover can not only play a protective role, but also support the upper cover 401 to strengthen the strength of the fuse box. Moreover, if the battery pack is accidentally squeezed and deformed, the squeezing force can also be transmitted to the base 405 through the protective cover, further protecting the fuse and improving the safety performance of the fuse box.

[0063] Considering that the battery pack may be used in vehicles with strong vibration conditions such as mining vehicles, the plug-in connector 200 in this embodiment is also connected with a locking bolt between the plug and the socket.

[0064] Please refer to Figure 4 The plug-in connector 200 in this embodiment includes a plug and a socket. The plug includes a plug body 201, and the socket includes a socket body 210. The plug body 201 is provided with a plug connection part 203. The plug connection part 203 in this embodiment is a wing plate provided on both sides of the plug body 201. The socket body 210 is provided with a socket connection part, and the socket connection part and the plug connection part 203 can be connected by a locking bolt 202. In order for the locking bolt 202 to pass through the plug connection part 203 and the socket connection part smoothly, the plug connection part 203 and the socket connection part should be respectively provided with at least one bolt mounting hole.

[0065] Specifically, in this embodiment, the bolt mounting hole provided in the plug connecting part 203 is a smooth hole, which is used for the locking bolt 202 to pass through, and the bolt mounting hole provided in the socket connecting part is a threaded hole 205. The locking bolt 202 passes through the smooth hole of the plug connecting part 203 and is threadedly connected to the threaded hole 205 of the socket connecting part, thereby pressing the plug tightly and connecting it. Compared with the prior art, this significantly improves the stability of the connection between the plug and the socket.

[0066] Considering that it is difficult for on-site staff to accurately judge when the plug and the socket are plugged in place, and when the locking bolt 202 is screwed in place, it is necessary to avoid excessive plugging or relative displacement of the plug and the socket when the locking bolt 202 is screwed in place, which may cause excessive compression and damage to the plug-in mating terminals of the plug and the socket. In this embodiment, the plug-in connector 200 also includes a positioning structure. The positioning structure includes a plug positioning structure provided on the plug and a socket positioning structure provided on the socket. An indication structure may be provided in one of the socket positioning structure and the plug positioning structure, or both the socket positioning structure and the plug positioning structure may be provided. When installing the locking bolt 202, the indication structure may be observed to accurately judge the tightness of the socket and the plug, and to judge whether the plug and the socket are plugged in place. When the plug positioning structure and the socket positioning structure are just matched, the locking bolt 202 may be screwed, and the indication structure may be observed in real time to avoid excessive screwing of the locking bolt 202 causing relative compression of the plug and the socket.

[0067] In this embodiment, the plug positioning structure includes a positioning hole 204, and the socket positioning structure includes a positioning protrusion 208, and the positioning protrusion 208 and the positioning hole 204 are interlaced and matched. Furthermore, the protrusion height of the positioning protrusion 208 is equal to the hole depth of the positioning hole 204. After the positioning protrusion 208 is inserted into the positioning hole 204, the upper surface of the positioning protrusion 208 is flush with the upper edge of the positioning hole 204, that is, the upper surface of the positioning protrusion 208 forms an indication structure.

[0068] When installing the plug, the position of the plug can be limited by the cooperation of the positioning hole 204 and the positioning protrusion 208. Therefore, the positioning protrusion 208 also plays a role in supporting the plug. At the same time, it also ensures that the screw hole of the plug body and the threaded hole of the socket are aligned, which is convenient for directly screwing the locking bolt 202. During the docking process of the plug and the socket, if the upper surface of the positioning protrusion 208 is flush with the positioning hole 204, it means that the plug and the socket have been plugged in place. Moreover, after the installation is completed, the whole is still flush, the positioning protrusion 208 will not protrude from the plug connection part, and it also has a better aesthetics.

[0069] In addition, the positioning hole 204 and the positioning protrusion 208 cooperate together to prevent the positive and negative poles of the connector from being misaligned. The positioning protrusion 208 in the positive or negative connector corresponds to the position of the positioning hole 204, avoiding incorrect installation of the connector.

[0070] Furthermore, the positioning protrusions 208 in this embodiment include two. The two positioning protrusions 208 can play a role in supporting the plug synchronously, thus achieving a rotation-stopping effect on the plug. In this way, when the locking bolt is screwed, even if the staff touches the plug, the position of the plug is still stable under the action of the positioning protrusions and will not deflect, which also plays a role in protecting the contact terminal.

[0071] In order to further improve the anti-rotation effect of the plug and the socket, a rear guide key 209 is further provided on the plug-in portion 207 of the socket in this embodiment. This not only facilitates smooth plugging of the plug with the socket, but also avoids relative rotation between the plug and the socket.

[0072] Considering that a deeper threaded hole 205 can be drilled, a connecting boss 206 is provided on the socket body of this embodiment, and the connecting boss 206 forms the socket connecting part.

[0073] The specific embodiment 2 of the battery pack provided by the present invention is different from the embodiment 1 mainly in that: in the embodiment 1, the plug-in connector includes a plug connection part and a socket connection part, and the plug connection part and the socket connection part are fastened by a locking bolt. In this embodiment, the plug-in connector may only include a plug and a socket, and there is no need to use a locking bolt to fasten the connection. In this case, the battery pack is also suitable for working conditions with low vibration.

[0074] The specific embodiment 3 of the battery pack provided by the present invention is different from the embodiment 1 mainly in that: in the embodiment 1, the positioning structure includes a positioning hole provided on the plug body and a positioning protrusion provided on the socket body. In this embodiment, the socket positioning structure can be a positioning column provided on the socket body, and a scale is set on the positioning column. The plug positioning structure can be formed by a plug connection part, and the positioning column is located on one side of the socket connection part. When installing the plug, the scale of the positioning column can be observed. When the position of the plug connection part is flush with a scale line (indicating structure) of the positioning scale, it means that it has been plugged in place.

[0075] The specific embodiment 4 of the battery pack provided by the present invention is different from the embodiment 1 mainly in that: in the embodiment 1, the fuse box is also equipped with a protective cover. In this embodiment, the fuse box may not be equipped with a protective cover, which may reduce a certain protective effect, but does not affect the installation of the fuse.

[0076] The specific embodiment 5 of the battery pack provided by the present invention is different from the embodiment 1 mainly in that: in the embodiment 1, the protective cover of the fuse box has a support portion for supporting the upper cover. In this embodiment, the protective cover may not be supported by the upper cover of the fuse box, which may reduce the strength of the fuse box to a certain extent, but it will not affect the installation of the fuse.

[0077] Specific embodiments of the method for preparing the battery pack of the present invention:

[0078] The preparation method of the battery pack in the present invention is consistent with the battery pack modification preparation method or the direct preparation method in the above-mentioned battery pack embodiment, and will not be described in detail.

[0079] Specific embodiments of the power supply system in the present invention:

[0080] The power system includes at least two battery packs connected in series or parallel, at least one of which is a battery pack described in any one of the embodiments 1 to 5 of the battery pack, which will not be described in detail here. Because the battery pack is equipped with an independent fuse box, when the power system includes multiple battery packs, only one battery pack may be the battery pack with the fuse box, and the other battery packs may not be equipped with a fuse box, which also has a lower cost.

[0081] Considering the universality of the box, if other battery packs in the power system are not equipped with fuse boxes, the other battery packs can be equipped with cover 500, such as Figure 3 and Figure 6 As shown, the structure of the blind cover 500 is similar to the upper cover 401 of the fuse box, and the blind cover can be connected using the connecting hole of the upper cover 401 and the box body, and the sealing structure of the blind cover 500, such as the second waterproof ring 501, can be consistent with the structure of the first waterproof ring 404, which has low cost and is convenient for mass production and procurement.

[0082] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery pack, comprising a box, the box having a positive electrode interface and a negative electrode interface, both the positive electrode interface and the negative electrode interface being connected to an electrical connector, characterized in that: The electrical connectors of the positive electrode interface and the negative electrode interface are both plug-in connectors, which include a plug and a socket. The battery pack is also equipped with a fuse box, which is installed between the positive electrode interface and the negative electrode interface of the box.

2. The battery pack according to claim 1, characterized in that: The plug includes a plug body, and the socket includes a socket body. The plug body is provided with a plug connecting part for fixedly connecting with the socket body, and the socket body is provided with a socket connecting part for cooperating with the plug connecting part. The plug connecting part and the socket connecting part are connected by bolts, and at least one bolt mounting hole is respectively provided on the plug connecting part and the socket connecting part.

3. The battery pack according to claim 2, characterized in that: The plug-in connector also includes a positioning structure, which includes a plug positioning structure arranged on the plug body and a socket positioning structure arranged on the socket body. The plug positioning structure and the socket positioning structure are positioned and matched with each other. The socket positioning structure and / or the socket positioning structure include an indicating structure for indicating the tightness of the connection between the plug connecting part and the socket connecting part.

4. The battery pack according to claim 3, characterized in that: The socket positioning structure includes a positioning protrusion, and the plug positioning structure includes a positioning hole. The positioning protrusion is used to be inserted and positioned with the positioning hole.

5. The battery pack according to claim 4, characterized in that: The upper protrusion height of the positioning protrusion is equal to the hole depth of the positioning hole used for matching therewith, and the indicating structure is formed by the upper surface of the positioning protrusion.

6. The battery pack according to any one of claims 1 to 5, characterized in that: The fuse box includes a base and an upper cover fixedly connected to the base to enclose a fuse setting cavity. The base is provided with two connection points for connecting with two contacts of the fuse. The fuse box is also provided with a protective cover, which is located in the fuse setting cavity. The protective cover includes a cover surface for covering the connection points and a connecting portion for connecting to the base.

7. The battery pack according to claim 6, characterized in that: The base is provided with a connecting groove, the connecting point is arranged in the connecting groove, and the connecting part comprises a connecting structure for connecting with a side wall of the connecting groove.

8. The battery pack according to claim 6, characterized in that: The protective cover also has a supporting portion for supporting the upper cover.

9. A power supply system comprising at least two battery packs connected in series or parallel, characterized in that: At least one battery pack is a battery pack as described in any one of claims 1-8.

10. A method for preparing a battery pack, characterized in that: Modify the battery pack box with positive and negative locking bolt connectors and MSD between them, remove the positive and negative locking bolt connectors and MSD, and obtain the required standby box, or directly use a standby box of the same model as the battery pack box with positive and negative locking bolt connectors and MSD between them, respectively install plug-in connectors at the positive and negative connector installation positions on the standby box, and install a fuse box at the position corresponding to the original MSD between the positive and negative plug-in connectors.

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