CN211442194U - Power battery BDU and power battery system - Google Patents
Power battery BDU and power battery system Download PDFInfo
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- CN211442194U CN211442194U CN201921841891.8U CN201921841891U CN211442194U CN 211442194 U CN211442194 U CN 211442194U CN 201921841891 U CN201921841891 U CN 201921841891U CN 211442194 U CN211442194 U CN 211442194U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a power battery BDU and power battery system, power battery BDU includes: the casing locates total corotation on the casing and connects copper bar, total burden switching copper bar, locates main positive loop, main negative loop, high pressure acquisition connector, the low pressure control connector in the casing, the casing includes: the base comprises a base main body, and two opposite base supporting plates are vertically formed at the bottom of the base main body in a direction away from the upper cover. The base main part of power battery BDU and the components and parts on its upper portion all mainly bear by the base extension board, and whole power battery BDU's weight falls on the lower case seat of box, rather than going up the case lid on for whole BDU can not oppress last case lid, has avoided directly establishing can lead to going up the case lid to warp, oppress the battery module in the box then and cause the installation hidden danger on last case lid.
Description
Technical Field
The utility model belongs to the technical field of electric automobile power battery, concretely relates to power battery BDU and power battery system.
Background
With the popularization of new energy automobiles, the requirements on power battery systems are higher and higher. At present, the Battery system of pure electric vehicle of new forms of energy, its frame main part is often mostly transformed from traditional fuel car automobile body, this kind of mode is because the fuel car has been through market verification, consider for safety and quality, but the structural design of fuel car bottom is not considered for dress Battery system after all, so will cause the Battery system to need follow the vehicle bottom molding and design, just so lead to Battery system shape relatively heterotypic, lead to Battery system's shape dysmorphism, lead to subassembly such as Battery module and BDU (Battery Disconnect Unit, high-voltage distribution box) inside the Battery system can't rationally effectual arranging, cause considerable design space waste, thereby influence the energy density of Battery system.
The development of the new industry is bound to be innovated, and the battery system is the most key energy system of the new energy automobile, so that the whole automobile and the battery system are cooperatively designed, and the whole automobile is designed according to the reasonable shape of the battery system as much as possible, so that the carrying capacity of the new energy automobile can be ensured, and the quality and the safety performance of the automobile can be ensured.
And current electric automobile power battery system arranges the timing when carrying out the inside row of battery system, sets up BDU inside battery system usually, sets up like this and mainly has two problems: firstly, because the volume size of the high-voltage distribution box is inconsistent with the volume size of a single battery module, and because the shape of the battery system is abnormal, although the volume of the BDU is about 1.5 times of the volume of the battery module, the BDU actually occupies 2 times or more of the space in the battery system, and the space in the battery system is wasted. Two, because the part that the easy damage that takes place in battery system content often all takes place inside the BDU, so when battery system appears unusually to need the inspection maintenance to change components and parts, need unpack whole battery system apart, open the lid that could open BDU with battery system's upper cover earlier, this process can lead to the battery module to expose completely in the air, has in aqueous vapor or the electrically conductive dust falls into battery system easily, causes the later stage to have dangerous hidden danger.
Patent document No. 201821471903.8 discloses a high voltage distribution box and an electric vehicle, the high voltage distribution box including: casing and upper cover, the casing can be dismantled with the upper cover and be connected, the casing is the recess form, the casing bottom is equipped with fast plug connector, fast plug connector is used for connecting power battery package, fast plug connector subassembly is worn to be equipped with in the side of casing, fast plug connector subassembly is used for connecting high-pressure electrical apparatus, be equipped with the relay in the casing, the relay is connected with fast plug connector and fast plug connector subassembly electricity respectively, the upper cover is embedded to have electrically conductive row and circuit detection device, electrically conductive row is connected with the relay electricity.
Compared with the traditional method of arranging the BDU inside the battery system, the technical scheme realizes that the BDU is arranged outside the battery system, but still has the following defects:
firstly, the whole of the high-voltage distribution box is separated from the whole of a battery pack (namely a battery system), the bottom of a shell of the high-voltage distribution box is fixed with a quick-plug connector through screws, a quick-plug connecting assembly is arranged on the side surface in a penetrating manner, the quick-plug connecting assembly comprises a front-drive motor connector, a rear-drive electrode connector, a slow-charge connector and an air-conditioning system connector, namely, the high-voltage distribution box adopts a plurality of connectors, so that the manufacturing cost of the battery system is increased; moreover, a plurality of plug connectors are adopted, so that a plurality of switching exists in the whole connecting loop, and the possibility of connection failure is increased;
after the quick-plug connector is connected with a power battery pack, the whole high-voltage distribution box is placed on the battery pack, namely the upper cover of the battery pack bears the weight of all the high-voltage distribution boxes, and after the high-voltage distribution box is used for a long time, the upper cover of the battery pack is sunken and deformed, so that a battery core in the battery pack is influenced, and hidden dangers are caused; and, the whole setting of high voltage distribution box is outside the battery package, and its holistic structural strength mainly improves the assurance through the thickness that increases the casing, and this will further increase high voltage distribution box's weight, further aggravate the potential safety hazard.
Disclosure of Invention
The utility model aims at providing a power battery BDU and power battery system aims at solving the current not enough problem of external BDU's mounting structure intensity.
In order to achieve the above object, the utility model provides a power battery BDU, include: the casing locates total corotation on the casing and connects copper bar, total negative switching copper bar, locates main positive return circuit, main negative return circuit, high pressure collection connector, low pressure control connector in the casing, wherein, main positive return circuit connects total corotation connects the copper bar, main negative return circuit connects total negative switching copper bar, high pressure collection connector low pressure control connector all connects main positive return circuit and main negative return circuit, the casing includes: the base comprises a base main body, wherein the total positive rotation connecting copper bar, the total negative rotation connecting copper bar, the main positive loop, the main negative loop, the high-voltage acquisition connector and the low-voltage control connector are arranged on the base main body, and two opposite base supporting plates are vertically formed at the bottom of the base main body in the direction away from the upper cover.
Preferably, the base main body is in a square plate shape, and the base support plate is formed on two opposite sides of the base main body in a bending mode; the upper cover is in a groove shape which is sunken upwards, and the upper cover covers the base main body in a buckling manner.
Preferably, one side of the base support plate, which is away from the base main body, is vertically bent to form a fixing edge, and the fixing edge is provided with a fixing hole.
Preferably, the top edge of the base main body is provided with a plurality of screw connection holes; the opening edge of the upper cover is bent to form an upper cover edge, an upper cover through hole is formed in the upper cover edge, the upper cover through hole corresponds to the screw connecting hole in position, and the upper cover edge is fixed on the base main body through a plurality of screws.
Preferably, the housing further comprises: the waterproof sealing ring is consistent with the upper cover edge in shape, the waterproof sealing ring is provided with a sealing ring through hole corresponding to the upper cover through hole in position, and the waterproof sealing ring is installed between the upper cover edge and the base main body through screws.
Preferably, the upper cover is provided with a first mounting port and a second mounting port, which are respectively provided with a discharge connector and a quick-charge connector, and the discharge connector and the quick-charge connector are connected with the main positive loop and the main negative loop.
Preferably, the main positive loop comprises: the main positive relay and the main positive interface are sequentially connected; the main negative circuit includes: the main negative switching copper bar, the shunt, the main negative relay and the main negative interface are sequentially connected; the total positive relay and the total negative relay are connected with the discharging connector; the shell is also provided with a heating positive switching copper bar and a heating negative switching copper bar, and the shell is also internally provided with a pre-charging loop, a quick-charging loop and a heating loop; the pre-charging loop comprises a pre-charging resistor and a pre-charging relay, the pre-charging relay is connected with the pre-charging resistor, and the pre-charging resistor and the pre-charging relay are respectively connected to two ends of the main positive relay in the positive and negative directions; the quick charge circuit includes: the quick charging relay is connected with the quick charging connector; the heating circuit includes: the heating device comprises a heating fuse and a heating relay, wherein the positive end of the total positive relay is connected with the heating positive switching copper bar, and the negative end of the total positive relay is sequentially connected with the heating relay, the heating fuse and the heating negative switching copper bar.
The utility model also provides a power battery system, include: the box, locate battery module and BDU in the box, the box includes lower box base, upper box cover, it has the BDU installing port to open on the upper box cover, the BDU be above-mentioned arbitrary power battery BDU, power battery BDU's base extension board stretches into between two adjacent battery modules, and fixes on the lower box base, power battery BDU's base main part with BDU installing port position just ground with the upper box cover is connected fixedly.
Preferably, module mounting holes are formed in two ends of the battery module, and a screw is arranged in each module mounting hole; one side of the base support plate, which is far away from the base main body, is provided with a fixing edge which is formed by vertically bending, a fixing hole is formed in the fixing edge, the fixing hole corresponds to the module mounting hole in position, and the screw rod sequentially penetrates through the module mounting hole and the fixing hole to fix the battery module and the base support plate on the lower box base.
Preferably, a cover through hole is formed in the edge of the BDU mounting opening of the upper cover; the edge of the opening of the upper cover is bent to form an upper cover edge, and an upper cover through hole is formed in the upper cover edge; the top edge of the base main body is provided with a screw connecting hole; the box cover through holes, the upper cover through holes and the screw connecting holes correspond to one another and are connected through screws.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect:
one, power battery BDU is through setting up the bottom extension board in the bottom, and the base extension board can just hold between two adjacent battery module for whole BDU can be installed fixedly from power battery system box inside, but outstanding in whole box, the base extension board all supports the back outside power battery system with the components and parts in the base main part, has made things convenient for the maintenance of examining to BDU inside, only need when needing to open BDU unpack BDU's upper cover can, and need not open the upper box cover of box, aqueous vapor and electrically conductive dust fall into and cause the quality hidden danger in the box when having avoided opening the box at every turn.
The BDU is fixed in the lower box seat of the box body through the base support plate, so that the whole BDU does not occupy the inner space of the power battery system more, the mounting space in the power battery system is fully utilized, the distance between the two base support plates can be set to be a multiple of the distance between two adjacent battery modules, for example, the width of a VDA standard module specified by the national recommendation is two times that of the VDA standard module, and the BDU and the power battery system can realize standardized production and mounting without redesigning one by one.
Thirdly, the base main body of the BDU and components on the upper part of the BDU are mainly borne by the base support plate, and the weight of the BDU is placed on the lower box seat of the box body instead of the upper box cover, so that the BDU can not press the upper box cover, and the hidden mounting trouble caused by the deformation of the upper box cover and the subsequent pressing of a battery module in the box body due to the direct arrangement on the upper box cover is avoided; and the inside of the BDU is connected with each battery module through a total positive rotation copper bar and a total negative rotation copper bar, the outside of the BDU is connected with an automobile high-voltage device through a discharge connector, and the BDU is also provided with a quick-charging connector which is convenient to connect and use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a structural diagram of a BDU according to an embodiment of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a top view of FIG. 1 with the BDU cover omitted;
FIG. 4 is a block diagram of the BDU base of FIG. 1;
fig. 5 is a structural diagram of a power battery system according to a second embodiment of the present invention;
FIG. 6 is an exploded view of FIG. 5;
FIG. 7 is an enlarged view taken at A of FIG. 6;
FIG. 8 is a vertical, partial cross-sectional block diagram of the power cell system set forth in FIG. 5;
FIG. 9 is an enlarged view of FIG. 8 at B;
FIG. 10 is a top view of FIG. 8;
fig. 11 is a structural view illustrating the installation of a power battery BDU in the power battery system of fig. 5.
The reference numbers of the utility model explain:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Total positive rotation copper connecting bar | 8 | |
| 2 | Total negative |
9 | Quick- |
| 3 | High- |
10 | Total |
| 4 | Low- |
11 | |
| 5 | |
12 | Total negative relay |
| 5-1 | Base |
13 | Heating positive switching copper bar |
| 5-2 | |
14 | Heating negative switching copper bar |
| 5-3 | Fixed |
15 | Pre-charging resistor |
| 5-4 | |
16 | Pre-charging relay |
| 5-5 | |
17 | |
| 6 | |
18 | Heating relay |
| 6-1 | |
19 | Quick charging relay |
| 6-2 | Through hole of |
20 | Lower box seat |
| 6-3 | The |
21 | Upper box cover |
| 6-4 | Second mounting port | 21-1 | |
| 7 | |
22 | Battery module |
| 7-1 | Through hole of sealing ring | 22-1 | Module mounting hole |
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
Example one
Referring to fig. 1 to fig. 4, a BDU of a power battery according to an embodiment of the present invention includes: the casing is equipped with total corotation on the casing and connects copper bar 1, total negative switching copper bar 2, is equipped with main positive return circuit, main negative return circuit, high pressure collection connector 3, low pressure control connector 4 in the casing, and wherein, main positive return circuit connection total corotation connects copper bar 1, and main negative return circuit connection total negative switching copper bar 2, and high pressure collection connector 3, low pressure control connector 4 connect main positive return circuit and main negative return circuit.
The BDU has the basic functions of a conventional BDU, is connected with each Battery module in a power Battery System through a total positive switching copper bar 1 and a total negative switching copper bar 2, is connected with a high-voltage device of a new energy automobile through a main positive loop and a main negative loop to supply power to the automobile, collects a plurality of high-voltage sampling signals in the main positive loop and the main negative loop through a high-voltage collecting connector 3 and outputs the high-voltage sampling signals to a BMS (Battery Management System), so that the BMS can carry out functional design such as relay adhesion detection and the like after data processing and analysis according to the collected high-voltage signals, collects control signals of each relay in the main positive loop and the main negative loop through a low-voltage control connector 4 and outputs the control signals to the BMS, the BMS can control each relay in the main positive loop and the main negative loop according to the collected low-voltage control signals, and is connected between the Battery modules and the high-voltage device of the automobile, for switching the high voltage power off or on.
The shell of the BDU comprises a base 5 and an upper cover 6, wherein the base 5 comprises a base main body 5-1 and a base support plate 5-2 arranged at the bottom of the base main body 5-1. The upper cover 6 covers the base main body 5-1 and covers the main positive loop, the main negative loop, the high-voltage acquisition connector 3, the low-voltage control connector 4 and other protection devices fixed on the base main body 5-1. The base support plate 5-2 comprises two parallel base support plates 5-2, and the base support plates 5-2 are perpendicular to the base main body 5-1.
Therefore, the power battery BDU is an internally-installed protruding type power battery BDU, can be installed and fixed from the inside of a power battery system, protrudes out of the whole power battery system, does not occupy the internal space of the power battery system, and fully utilizes the installation space in the power battery system. The specific arrangement mode is that, referring to fig. 5 to 11, a BDU mounting port 21-1 is formed in an upper case cover 21 of a power battery system case, a base main body 5-1 can be fixed on a lower case base 20 through a base support plate 5-2, the base support plate 5-2 can be just accommodated in a hole between two adjacent battery modules 22, the base main body 5-1 is arranged at the BDU mounting port and seals the BDU mounting port 21-1, a part of the total positive rotation copper bar 1 and a part of the total negative rotation copper bar 2 extend out of the bottom of the base main body 5-1, so that the base main body and the battery modules in the case can be electrically connected, and all protection devices on the upper portion of the base main body 5-1 are covered by an upper cover 6.
After the power battery BDU is installed, the base main body 5-1 and the components on the upper part of the base main body are mainly supported by the base support plate 5-2, the weight of the whole power battery BDU falls on the lower box seat 20 of the box body, but not the upper box cover 6, therefore, the utility model not only realizes the installation outside the power battery system, but also can not press the upper box cover 21, avoids the potential installation hazard caused by the deformation of the upper box cover 21 and the subsequent pressing of the battery module 22 in the box body which are arranged on the upper box cover 21, after the BDU is arranged outside the power battery system, the BDU is greatly convenient for workers to check and maintain the interior of the BDU, only the upper cover needs to be detached, can maintain the operation to the components and parts on the base main part, and do not need traditional will open the last case lid of power battery system box earlier, open the BDU lid again, also avoided when opening the box at every turn aqueous vapor and electrically conductive dust fall into and cause the quality hidden danger in the box.
Moreover, the distance between the two base support plates 5-2 is set to be a multiple of the distance between the two adjacent battery modules, for example, the distance can be twice the width of a national recommended VDA standard module, so that the power battery BDU can realize standardized production and installation without redesigning the power battery BDU one by one, and the power battery BDU is a built-in protruding type standardized power battery BDU.
Furthermore, the base main body 5-1 is a square flat plate, the base support plate 5-2 is bent and formed on two opposite sides of the base main body 5-1, and correspondingly, the upper cover 6 is a groove shape which is sunken upwards, and the upper cover 6 is buckled on the base main body 5-1 to buckle and cover components in the base main body 5-1. The bottom of the base support plate 5-2 is also bent outwards and vertically to form a fixed edge 5-3, and a fixed hole 5-4 is formed in the fixed edge 5-3.
The top edge of the base main body 5-1 is provided with a plurality of screw connection holes 5-5. The opening edge of the upper cover 6 is bent to form an upper cover edge 6-1, an upper cover through hole 6-2 is formed in the upper cover edge 6-1, the upper cover through hole 6-2 corresponds to the screw connecting hole 5-5 in position, and the upper cover edge 6-1 is fixed on the base main body 5-1 through a plurality of screws.
Therefore, the base 5 is a support similar to a Chinese character 'ji', when in installation, firstly, the base 5 and components on the base 5 are arranged in the box body together, the fixed edge 5-3 at the bottom of the base 5 is attached to the lower box base 20, and the base support plate 5-2 can be fixed on the lower box base 20 through the fixed hole 5-3, so that the installation is very stable; then, the upper case cover 21 is covered (all battery modules in the lower case base are installed at this time), the upper case cover 21 is positioned above the base main body 5-1, the BDU installation opening 21-1 of the upper case cover 21 just corresponds to the base main body 5-1, the edge of the BDU installation opening 21-1 of the upper case cover 21 is provided with a plurality of case cover through holes (not shown), and each case cover through hole corresponds to each screw connection hole 5-5 one by one; then, covering the upper cover 6 on the base 5 in a buckling manner, wherein the edge 6-1 of the upper cover is attached to the main body 5-1 of the base, and the through holes 6-2 of the upper cover are in one-to-one correspondence with the screw connecting holes 5-5; finally, a plurality of screws are used, and the screws sequentially penetrate through the upper cover through holes 6-2 and the box cover through holes to be in threaded connection with the screw connecting holes 5-5, so that the upper cover 6, the upper box cover 21 and the base main body 5-1 are fixedly connected together.
Further, the housing further includes: the waterproof sealing ring 7 is square and is consistent with the shape and the size of the upper cover edge 6-1, a plurality of sealing ring through holes 7-1 are formed in the waterproof sealing ring 7, the sealing ring through holes 7-1 are in one-to-one correspondence with the positions of the upper cover through holes 6-2, when the upper cover 6 is installed, the waterproof sealing ring 7 is arranged between the upper cover 6 and the upper cover 21, and the waterproof sealing ring 7 can be fixed together when the upper cover 6 is connected to the upper cover 21 through screws. The waterproof sealing ring 7 effectively ensures the sealing performance of the power battery system.
Further, the main positive loop includes: the main positive relay 10, the main positive interface, the main positive connecting copper bar 1, the main positive relay 10 and the main positive interface are connected in sequence. The main negative loop includes: the shunt 11, the total negative relay 12, the total negative interface, the total negative switching copper bar 2, the shunt 11, the total negative relay 12 and the total negative interface are connected in sequence. The total positive relay 10 and the total negative relay 12 are connected with the discharging connector 8. The shell is also provided with a heating positive switching copper bar 13 and a heating negative switching copper bar 14, and the shell is also internally provided with a pre-charging loop, a quick-charging loop and a heating loop. The pre-charging loop comprises a pre-charging resistor 15 and a pre-charging relay 16, the pre-charging relay 16 is connected with the pre-charging resistor 15, and the pre-charging resistor 15 and the pre-charging relay 16 are respectively connected with two ends of the main positive relay 10 in the positive and negative directions. Fill the return circuit soon and include: and the quick charging relay 19 is connected with the quick charging connector 9. The heating circuit includes: heating fuse 17, heating relay 18, the positive terminal and the heating positive switching copper bar 13 of total positive relay 10 are connected, and the negative pole end and the heating relay 18 of total positive relay, heating fuse 17, the heating negative switching copper bar 14 are connected in proper order.
Wherein, total corotation connects copper bar 1 and total positive relay 10 to be connected, is connected with discharge connector 8 and quick connector 9 that fills again, and total negative switching copper bar 2 passes through shunt 11 and connects total negative relay 12, connects discharge connector 8 again and quick connector 9 that fills, and shunt 11 is used for carrying out current detection when charging and discharging to battery system. Many voltage acquisition lines that 3 branches of high pressure acquisition connector are used for gathering total pressure of battery system, gather the high-pressure signal of many places at each relay both ends, and high pressure acquisition connector 3 sends each voltage signal who gathers to BMS and carries out analysis processes, carries out relay adhesion by BMS and detects. The low-voltage control connector 4 branches to form a plurality of control lines which are connected with the relays, and signals of the relays are sent to the BMS to be processed in a unified mode, so that the relays can be controlled conveniently.
Therefore, the utility model discloses whole block terminal possess the main loop always positive control function, the main loop always burden control function, total pressure gather accuse ability, current collection function, relay adhesion function, heating function, fill functions such as function, pre-charge function more soon, can satisfy the design demand of motorcycle type to BDU on the market, satisfy standardized condition.
In the embodiment, the main positive loop and the main negative loop adopt the discharging connector 8 to provide power for the whole automobile and supply power for the power system, the air conditioner and other equipment of the automobile, and the main positive loop and the main negative loop are also connected with the quick charging connector 9 to realize the charging function of the automobile. Correspondingly, the upper cover 6 of the utility model is provided with a first mounting port 6-3 and a second mounting port 6-4, and the discharge connector 8 and the quick charging connector 9 are respectively clamped at the first mounting port 6-3 and the second mounting port 6-4. Therefore, after the upper cover 6 is mounted, the discharge connector 8 and the quick charge connector 9 are mounted in place, and before the upper cover 6 is disassembled, the discharge connector 8 and the quick charge connector 9 are disassembled. Compare traditional pencil and connect, adopt discharge connector 8 and fill connector 9 soon and connect the high pressure of car with electrical apparatus, it is more convenient to install and maintain, and discharge connector 8 and fill connector 9 itself soon and can guarantee and the leakproofness of being connected between upper cover 6 in the cooperation.
Total corotation connects copper bar 1, total negative switching copper bar 2, the end that heating corotation connects copper bar 13 and heating negative switching copper bar 14 all is equipped with the switching double-screw bolt, convenient total positive pole with the battery module, total negative pole is connected, consequently, interconnecting link between this high voltage distribution box and the battery module has still remain the mode that traditional copper bar is connected, and does not adopt too much plug connector to carry out the switching, has avoided leading to the fact the increase of trouble with too much switching in connecting the return circuit.
Furthermore, the shell is made of aluminum alloy, the weight is light, the strength is high, reinforcing ribs are formed on the top surface and the side surface of the upper cover 6, the weight of the shell can be further reduced, the mechanical strength of the shell is improved, and deformation is prevented. The upper cover 6 made of the aluminum alloy material can effectively shield all components in the upper cover, can prevent the influence of a large-current complex electromagnetic environment in the battery system on the acquisition, communication and control of the automobile battery management system, and guarantees the safety of the vehicle.
Example two
Referring to fig. 5 to 11, a second embodiment of the present invention provides a power battery system, which includes a box body, wherein the box body includes a lower box base 20 and an upper box cover 21, and a plurality of battery modules 22 are arranged in the box body; the upper box cover 21 is provided with a BDU mounting opening 21-1, the BDU mounting opening 21-1 is provided with the power battery BDU according to any one of the first embodiment, the base support plate 5-2 of the BDU extends into the space between two adjacent battery modules 22 through the BDU mounting opening 21-1 and is fixed on the lower box base 20, and the base main body 5-1 and the BDU mounting opening 21-1 are connected and fixed with the upper box cover 20 in a position opposite to each other.
The power battery system is characterized in that a BDU mounting port 21-1 is formed in a box body, so that a power battery BDU can be mounted in the box body at a position corresponding to the BDU mounting port 21-1, the power battery BDU is fixed on a lower box base through a base support plate 5-2, components on a base main body 5-1 and the base main body 5-1 can protrude out of the whole box body at the position of the BDU mounting port 21-1, the BDU mounting port 21-1 of the box body is connected and sealed by the base main body 5-1 without influencing the sealing in the box body, when the power battery BDU is required to be inspected and maintained, only an upper cover 6 on the base main body 5-1 needs to be disassembled without opening an upper box cover 21 of the box body, so that the installation and the disassembly are convenient, and the phenomenon that water vapor and conductive dust are carried out on a battery module 22 in the box body when the upper box cover 21 is opened every, causing potential safety hazards.
Meanwhile, the two base support plates 5-2 are arranged in the gap between the two adjacent battery modules 22, so that the space in the box body is not required to be occupied, the space in the box body is fully utilized, the influence of the built-in installation of the traditional BDU on the energy density of the power battery system is reduced, the distance between the two base support plates 5-2 is set to be a multiple of the distance between the two adjacent battery modules, for example, the distance is twice of the width of a VDA standard module recommended by the state, so that the standardized production of all components of the power battery system can be realized, the standardized installation of the whole power battery system can be realized, the redesign of one project by one is not required, and the production efficiency is ensured.
Further, referring to fig. 8 to 11 again, each battery module 22 in the box body is fixed on the lower box base 20 through a screw, module mounting holes 22-1 penetrating up and down are formed at two ends of the battery module 22, and the screw is fixed on the lower box base 20 after penetrating through the module mounting holes.
In the embodiment, the bottom of the base support plate 5-2 is provided with a fixing edge 5-3, and the fixing edge 5-3 is provided with a fixing hole 5-4, so that, when the base support plate 5-2 needs to be fixed in the box body, only the fixing edge 5-3 of the base support plate 5-2 needs to be arranged between the bottom of the adjacent battery module 22 and the lower box seat 20, so that the fixing hole 5-3 corresponds to the module mounting hole 22-1 of the battery module 22, and the screw rod can pass through the fixing hole 5-4 after passing through the module mounting hole 22-1, thereby fixing the battery module 22 and the base support plate 5-2 on the lower box seat 20 together.
Further, a box cover through hole is formed in the edge, close to the BDU mounting opening 21-1, of the upper box cover 21; the edge of the opening of the upper cover 6 is bent to form an upper cover edge 6-1, and an upper cover through hole 6-2 is formed in the upper cover edge 6-1; a waterproof sealing ring 7 is arranged between the upper cover 6 and the upper box cover 21, and a sealing ring through hole 7-1 is arranged on the waterproof sealing ring 7; the top edge of the base main body 5-1 is provided with a screw connecting hole 5-5; the box cover through holes, the sealing ring through holes 7-1, the upper cover through holes 6-2 and the screw connecting holes 5-5 are in one-to-one correspondence and are connected through screws.
When the power battery BDU is installed, firstly, the base support plate 5-2 of the power battery BDU and the battery module 22 are fixed in the lower box seat 20 together; then, the upper box cover 21 is arranged on the lower box base 20, and the waterproof sealing ring 7 and the upper box cover 21 are arranged in sequence; then, the upper cover edge 6-1, the waterproof sealing ring 7, the upper cover 21 and the base main body 5-1 can be connected and fastened together by the screws through the plurality of cover through holes on the upper cover 21 which are arranged one by one and are riveted tightly.
In addition, since the BDU of the power battery system adopts all the technical solutions in the first embodiment, all the beneficial effects of the technical solutions in the first embodiment are also achieved, and are not described in detail herein.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (10)
1. A power cell BDU comprising:
a shell body, a plurality of first connecting rods and a plurality of second connecting rods,
a total positive switching copper bar (1) and a total negative switching copper bar (2) arranged on the shell,
a main positive loop, a main negative loop, a high-pressure acquisition connector (3) and a low-pressure control connector (4) which are arranged in the shell,
wherein the main positive loop is connected with the main positive connection copper bar (1), the main negative loop is connected with the main negative connection copper bar (2), the high-voltage acquisition connector (3) and the low-voltage control connector (4) are both connected with the main positive loop and the main negative loop,
it is characterized in that the preparation method is characterized in that,
the housing includes: a base (5), an upper cover (6) covered on the base (5),
the base (5) comprises a base main body (5-1), the total positive rotation connecting copper bar (1), the total negative rotation connecting copper bar (2), the main positive loop, the main negative loop, the high-voltage acquisition connector (3) and the low-voltage control connector (4) are arranged on the base main body (5-1),
two opposite base support plates (5-2) are vertically formed at the bottom of the base main body (5-1) in the direction departing from the upper cover (6).
2. The BDU according to claim 1, wherein the base body (5-1) has a square plate shape, and the base support plate (5-2) is bent and formed at two opposite sides of the base body (5-1); the upper cover (6) is in a groove shape which is sunken upwards, and the upper cover (6) is covered on the base main body (5-1).
3. The BDU as claimed in claim 2, wherein the side of the base support plate (5-2) away from the base main body (5-1) is vertically bent to form a fixing edge (5-3), and the fixing edge (5-3) is provided with a fixing hole (5-4).
4. The BDU according to claim 2, wherein the base body (5-1) has a plurality of screw connection holes (5-5) at its top edge; the opening edge of the upper cover (6) is bent to form an upper cover edge (6-1), an upper cover through hole (6-2) is formed in the upper cover edge (6-1), the upper cover through hole (6-2) corresponds to the position of the screw connecting hole (5-5), and the upper cover edge (6-1) is fixed on the base main body (5-1) through a plurality of screws.
5. The power cell BDU of claim 4, wherein the housing further comprises: the waterproof sealing ring (7) is consistent with the upper cover edge (6-1) in shape, a sealing ring through hole (7-1) corresponding to the upper cover through hole (6-2) is formed in the waterproof sealing ring (7), and the waterproof sealing ring (7) is installed between the upper cover edge (6-1) and the base main body (5-1) through screws.
6. The BDU as claimed in any claim 1 to 5, wherein the upper cover (6) is provided with a first mounting opening (6-3) and a second mounting opening (6-4) respectively clamped with a discharging connector (8) and a quick charging connector (9), and the discharging connector (8) and the quick charging connector (9) are connected with the main positive loop and the main negative loop.
7. The power cell BDU of claim 6, wherein the primary positive loop comprises: the main positive relay (10) and the main positive interface are sequentially connected, and the main positive connecting copper bar (1), the main positive relay (10) and the main positive interface are sequentially connected;
the main negative circuit includes: the main negative switching copper bar (2), the shunt (11), the main negative relay (12) and the main negative interface are sequentially connected;
the total positive relay (10) and the total negative relay (12) are connected with the discharging connector (8);
the shell is also provided with a heating positive switching copper bar (13) and a heating negative switching copper bar (14), and the shell is also internally provided with a pre-charging loop, a quick-charging loop and a heating loop;
the pre-charging loop comprises a pre-charging resistor (15) and a pre-charging relay (16), the pre-charging relay (16) is connected with the pre-charging resistor (15), and the pre-charging resistor (15) and the pre-charging relay (16) are respectively connected to two ends of the main positive relay (10) in the positive and negative directions;
the quick charge circuit includes: the quick charging relay (19), the quick charging relay (19) is connected with the quick charging connector (9);
the heating circuit includes: heating fuse (17), heating relay (18), the positive terminal of total positive relay (10) with heating corotation connects copper bar (13) to be connected, the negative pole end of total positive relay (10) with heating relay (18), heating fuse (17), heating burden switching copper bar (14) connect gradually.
8. A power battery system, comprising: a box body, a battery module (22) and a BDU which are arranged in the box body,
it is characterized in that the preparation method is characterized in that,
the box body comprises a lower box seat (20) and an upper box cover (21), a BDU mounting opening (21-1) is arranged on the upper box cover (21),
the BDU is the power battery BDU as claimed in any one of the claims 1 to 7,
a base support plate (5-2) of the power battery BDU extends into the space between two adjacent battery modules (22) and is fixed on the lower box seat (20),
and a base main body (5-1) of the power battery BDU and the BDU mounting port (21-1) are connected and fixed with the upper box cover (21) in a position opposite to each other.
9. The power battery system according to claim 8, characterized in that both ends of the battery module (22) are provided with module mounting holes (22-1), and a screw is arranged in each module mounting hole (22-1);
one side of the base support plate (5-2) departing from the base main body (5-1) is provided with a fixing edge (5-3) formed by vertically bending, the fixing edge (5-3) is provided with a fixing hole (5-4), and the fixing hole (5-4) corresponds to the module mounting hole (22-1);
the screw rod sequentially penetrates through the module mounting hole (22-1) and the fixing hole (5-4) to fix the battery module and the base support plate on the lower box seat.
10. The power battery system of claim 8, wherein the edge of the upper cover (21) at the BDU mounting opening (21-1) is provided with a cover through hole; the edge of the opening of the upper cover (6) is bent to form an upper cover edge (6-1), and an upper cover through hole (6-2) is formed in the upper cover edge (6-1); the top edge of the base main body (5-1) is provided with a screw connecting hole (5-5); the box cover through holes, the upper cover through holes (6-2) and the screw connecting holes (5-5) are in one-to-one correspondence and are connected through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921841891.8U CN211442194U (en) | 2019-10-30 | 2019-10-30 | Power battery BDU and power battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921841891.8U CN211442194U (en) | 2019-10-30 | 2019-10-30 | Power battery BDU and power battery system |
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| Publication Number | Publication Date |
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| CN211442194U true CN211442194U (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921841891.8U Active CN211442194U (en) | 2019-10-30 | 2019-10-30 | Power battery BDU and power battery system |
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| CN (1) | CN211442194U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092755A (en) * | 2020-09-22 | 2020-12-18 | 中国第一汽车股份有限公司 | Battery cutting device and battery pack system |
| CN112224024A (en) * | 2020-10-16 | 2021-01-15 | 南通国轩新能源科技有限公司 | BDU for new energy automobile |
| CN113954770A (en) * | 2021-10-20 | 2022-01-21 | 浙江吉利控股集团有限公司 | Core control system of vehicle |
| WO2024000258A1 (en) * | 2022-06-29 | 2024-01-04 | 宁德时代新能源科技股份有限公司 | Box body, battery and electric device |
-
2019
- 2019-10-30 CN CN201921841891.8U patent/CN211442194U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092755A (en) * | 2020-09-22 | 2020-12-18 | 中国第一汽车股份有限公司 | Battery cutting device and battery pack system |
| CN112224024A (en) * | 2020-10-16 | 2021-01-15 | 南通国轩新能源科技有限公司 | BDU for new energy automobile |
| CN113954770A (en) * | 2021-10-20 | 2022-01-21 | 浙江吉利控股集团有限公司 | Core control system of vehicle |
| CN113954770B (en) * | 2021-10-20 | 2024-04-30 | 浙江吉利控股集团有限公司 | Core control system of vehicle |
| WO2024000258A1 (en) * | 2022-06-29 | 2024-01-04 | 宁德时代新能源科技股份有限公司 | Box body, battery and electric device |
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