CN217822962U - Battery box - Google Patents

Abstract

The utility model discloses a battery box, include: the battery module comprises a box body, a cooling assembly and a cover plate, wherein the box body comprises a containing groove for containing the battery module; the cooling assembly comprises an upper liquid cooling plate, and the upper liquid cooling plate is positioned on the accommodating tank so as to cool the battery module in the accommodating tank; the apron is located the one side that the liquid cold drawing deviates from the box, apron detachably and box fixed connection to be used for compressing tightly last cooling plate on battery module. According to the utility model discloses battery box installs battery module and last liquid cold drawing in battery box through the detachable connected mode, and the convenience replaces structure in the past through detachable connection structure and glues with echelon utilization in follow-up in-use battery module disassembling, has further guaranteed the inflation clearance of reserving between the electric core, prevents that the structure from gluing the overflow and filling the inflation clearance.

Description

Battery box

Technical Field

The utility model belongs to the technical field of the vehicle and specifically relates to a battery box is related to.

Background

In order to meet the requirement of large-multiplying-power quick-charging cold quantity, a heat management technology needs to be developed towards high-efficiency cooling. The IBTC4.0 multilateral cooling (heating) technology is developed at the same time, the technology can make up the problem of insufficient capacity of unilateral cooling (heating), high-efficiency thermal management cooling is provided for 350kW high-rate quick charging, and high-speed quick charging and safe use of a battery system are guaranteed.

Present current top water-cooling board fixed mode mainly glues through the structure and goes to bond, and this kind of mode is undetachable fixed mode, is unfavorable for dismantling and echelon utilization of later battery, and unnecessary glue can overflow downwards in assembling process moreover and flow to between electric core, and the electric core bulging force clearance that reserves in the design originally is filled, can bring a series of problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a battery box, battery box passes through detachable connection structure and replaces the structure in the past to glue, has further guaranteed the inflation clearance of reserving between the electric core, prevents that the structure from gluing the overflow and filling the inflation clearance.

According to the utility model discloses battery box, include: the battery box comprises a box body, a cooling assembly and a cover plate, wherein the box body comprises a containing groove for containing a battery module; the cooling assembly comprises an upper liquid cooling plate, and the upper liquid cooling plate is positioned on the accommodating groove so as to cool the battery module in the accommodating groove; the cover plate is located on one side, away from the box body, of the upper liquid cooling plate, and the cover plate is detachably fixedly connected with the box body and used for pressing the upper liquid cooling plate (21) on the battery module.

According to the utility model discloses the battery box, in the concrete installation of last liquid cold drawing and battery module, put into the holding tank in the box with the battery module, the holding tank can set up according to the quantity of battery module, the shape of holding tank is also unanimous with the shape of battery module, battery module installation back, the top installation of last liquid cold drawing laminating battery module, then laminate the top of lapping in last liquid cold drawing, and lap and box fixed connection back, fix battery module and last liquid cold drawing in the holding tank of box in proper order, in concrete embodiment, set up the division board between the holding tank, set up in apron complex mounting structure on the division board, for example the bolt hole, be favorable to the stability of battery box structure through setting up a plurality of mounting structure.

According to the utility model discloses battery box installs battery module and last liquid cold drawing in battery box through the detachable connected mode, and the convenience replaces structure in the past through detachable connection structure and glues with the echelon utilization in the disassembling of follow-up in-use battery module, has further guaranteed the expansion gap of reserving between the electric core, prevents that the structure from gluing the overflow and filling the expansion gap. Install battery module and last liquid cold drawing in the battery box through the detachable mode, battery module and last liquid cold drawing are whole to be fixed in the battery box through the apron in, simple structure, the installation of being convenient for, safe and reliable goes up liquid cold drawing laminating battery module setting, and the coolant liquid of going up in the liquid cold drawing carries out the heat absorption cooling to battery module, improves battery module's radiating efficiency.

Further, the holding tank includes along first holding tank and the second holding tank that battery box width direction is spaced apart, go up the liquid cooling board include with first liquid cold drawing that first holding tank is relative and with the second liquid cold drawing that the second holding tank is relative, the apron lid is established first liquid cold drawing with the top of second liquid cold drawing, perhaps the apron includes first apron and second apron, first apron lid is established the top of first liquid cold drawing, the second apron lid is established the top of second liquid cold drawing.

Further, a plurality of first lightening grooves are formed in the cover plate and are spaced apart in the length direction of the cover plate and/or in the width direction of the cover plate, wherein each first lightening groove penetrates through the cover plate.

Further, the support piece is arranged in the spacing space to space the cover plate from the box body.

Furthermore, the supporting piece comprises a supporting plate, at least one second weight-reducing groove is formed in the supporting plate, at least one reinforcing rib is formed in each second weight-reducing groove, and the reinforcing ribs extend in the thickness direction of the box body.

Further, a first cross beam is formed in the accommodating groove, and the support is located between the first cross beam and the cover plate.

Further, a first connecting part is formed at one end, adjacent to the first cross beam, of the supporting piece, and a second connecting part matched with the first connecting part is formed on the first cross beam; and a third connecting part is formed at one end of the supporting part, which is adjacent to the cover plate, and a fourth connecting part matched with the third connecting part is formed on the cover plate.

Further, a second cross beam is formed in the accommodating groove, a fifth connecting portion is formed on the second cross beam, and a sixth connecting portion matched with the fifth connecting portion is formed on the cover plate.

Further, the battery box still includes the mounting, the fifth connecting portion with the sixth connecting portion all construct into with mounting complex fixed orifices, the mounting in proper order with the fifth connecting portion with the sixth connecting portion cooperation is in order with the apron is fixed on the box.

Further, the battery box also comprises a lower liquid cooling plate which is integrally formed with the box body so as to form a bottom wall of the box body.

According to the battery box of the embodiment of the utility model, in the specific installation process of upper liquid cooling plate and battery module, put the battery module into the holding tank in the box, the holding tank can be set according to the quantity of battery module, the shape of holding tank is also consistent with the shape of battery module, after the battery module is installed, the top that upper liquid cooling plate laminated battery module is installed, then laminate the apron on the top of upper liquid cooling plate, and then after the apron is fixedly connected with the box, fix battery module and upper liquid cooling plate in the holding tank of box in proper order, in the specific embodiment, set up the division board between the holding tank, set up in apron complex mounting structure on the division board, for example, the bolt hole, be favorable to the stability of battery box structure through setting up a plurality of mounting structure, here mounting structure can be connected apron with the box through setting up support piece, cooperate with the installation of support piece, can set up the crossbeam in the box, on the one hand can provide the installation department for the installation of support piece, on the other hand, also can divide the holding tank into a plurality of small holding tanks, be convenient for installing battery module; the installation parts are arranged at the corresponding positions of the support part, the cover plate, the first cross beam and the second cross beam, the support part and the cover plate, the support part and the first cross beam, the support part and the second cross beam are sequentially connected through the installation parts, the cover plate is fixedly installed on the box body, the battery module and the upper liquid cooling plate are fixedly installed between the cover plate and the box body, and the battery module is fixedly installed in the box body.

According to the utility model discloses the battery box, the battery module is installed in the battery box, the battery box sets up to the shape with battery module matched with, the upper and lower surface that is located the battery module sets up liquid cold drawing and lower liquid cold drawing, it is used for absorbing the heat to the upper portion of battery module to go up the liquid cold drawing, lower liquid cold drawing is used for absorbing the heat to the lower part of battery module, lower liquid cold drawing sets up the structure with battery box bottom plate integrated into one piece, be favorable to the spatial arrangement of battery box, the cooperation of going up liquid cold drawing and lower liquid cold drawing makes the heat dissipation of battery module more even, the temperature uniformity is better, performance and the life to the battery all can produce positive influence. Go up the runner in liquid cold drawing and the lower liquid cold drawing and set to "S" type runner, be favorable to prolonging the coolant liquid and stop at the surperficial time of battery module, it is more high-efficient to the heat absorption of battery module, be favorable to guaranteeing the security performance and the working property of battery package, the design of "S" type runner aim at reduces the inside maximum difference in temperature of battery, can improve its thermal inhomogeneities, can improve the thermal uniformity of different batteries in the same module of battery module. Install battery module and last liquid cold drawing in the battery box through detachable connected mode, the convenience replaces structure in the past through detachable connection structure and glues with echelon utilization in the disassembly and echelon of follow-up in-use battery module, has further guaranteed the expansion gap of reserving between the electric core, prevents that the structure from gluing the overflow and filling the expansion gap. Install battery module and last liquid cold drawing in the battery box through the detachable mode, battery module and last liquid cold drawing are whole to be fixed in the battery box through the apron in, simple structure, the installation of being convenient for, safe and reliable goes up liquid cold drawing laminating battery module setting, and the coolant liquid of going up in the liquid cold drawing carries out the heat absorption cooling to battery module, improves battery module's radiating efficiency. Install battery module and last liquid cold drawing in the battery box through the apron, effectively utilize the space in the battery box, improved the holistic rigidity of battery package and mode, this kind of mounting means liquid more is favorable to the battery to work all the time in suitable temperature range, avoids appearing the condition that the temperature is out of control or the power failure suddenly. The better inside difference in temperature with battery module control is good, and the temperature uniformity is better, all can produce positive influence to the performance and the life of battery, and the form of arranging of upper and lower layer produces further positive influence to the battery module difference in temperature, and compact structure is favorable to the spatial arrangement.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a battery box according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery box according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a cover plate of a battery box according to an embodiment of the present invention;

fig. 4 is an exploded view of a cover plate and a support member of a battery box according to an embodiment of the present invention;

fig. 5 is a partial enlarged view of a battery box according to an embodiment of the present invention;

fig. 6 is an installation view of a cover plate and a support member of a battery box according to an embodiment of the present invention;

fig. 7 is a schematic structural view of one of the support members of the battery box according to an embodiment of the present invention;

fig. 8 is a schematic structural view of another support member of the battery box according to an embodiment of the present invention;

reference numerals: 100-a battery box;

1-a box body; 11-a holding tank; 111-a first accommodating groove; 112-a second receiving groove; 12-a first beam;

13-a second connection; 14-a second beam; 15-a fifth connecting portion;

2-a cooling assembly; 21-upper liquid cooling plate; 211 — a first liquid-cooled plate; 212-a second liquid cold plate; 22-setting a liquid cooling plate;

3-cover plate; 31-a first cover plate; 32-a second cover plate; 33-a first lightening slot; 34-a fourth connection;

35-a sixth connecting portion; 351-fixing holes;

5-a support member; 51-a support plate; 52-reinforcing ribs; 53-a first connection; 54-a third connection; 6-fixing part.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The battery box 100 according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1, fig. 2 and fig. 3, the battery box 100 according to the embodiment of the present invention includes: the cooling device comprises a box body 1, a cooling component 2 and a cover plate, wherein the box body 1 comprises a containing groove 11 for containing a battery module; in specific embodiment, the shape of box 1 can be selected according to the shape of battery module, for example, can select square box 1, square box 1 can be applicable to most battery modules, also has the battery module of the specific shape of minority, and concrete shape is selected according to actual need to box 1, sets up in the corresponding holding tank 11 of battery module in box 1, and holding tank 11 is used for being fixed in battery module in box 1, and holding tank 11's quantity and arranging carry out the overall arrangement according to arranging of battery module. The cooling assembly 2 comprises an upper liquid cooling plate 21, and the upper liquid cooling plate 21 is located on the accommodating groove 11 to cool the battery module in the accommodating groove 11; go up the laminating of liquid cold drawing 21 and battery module' S top surface and set up, form first runner in going up liquid cold drawing 21, first runner sets to "S" type runner, is favorable to prolonging the coolant liquid and stops the time on battery module surface, and is more high-efficient to the heat absorption of battery module, is favorable to guaranteeing the security performance and the working property of battery package, and the feed liquor subassembly is with coolant liquid evenly distributed to last liquid cold drawing 21 in to be convenient for to the even heat dissipation of battery module.

The cover plate is positioned on one side, away from the box body 1, of the upper liquid cooling plate 21, and the cover plate is detachably and fixedly connected with the box body 1 so as to be used for pressing the upper cooling plate on the battery module; in a specific embodiment, the cover plate and the box body 1 can be connected by adopting a bolt connection mode, specifically, bolt holes are formed in the cover plate, corresponding bolt holes are formed in the box body 1 and the corresponding position of the cover plate, the cover plate and the box body 1 are fixedly connected through the bolt, in other embodiments, a connection mode of a clamping groove and a clamping buckle can be adopted between the cover plate and the box body 1, specifically, the clamping buckle is arranged on the cover plate, the corresponding position of the box body 1 is arranged in the clamping groove matched with the clamping buckle, other detachable connection modes can be adopted between the cover plate and the box body 1, the detachable connection mode can be used for facilitating the reinstallation and matching in the subsequent inspection and maintenance process, and the installation of the battery module and the upper liquid cooling plate 21 in the installation process is also facilitated.

According to the utility model discloses battery box 100, in the concrete installation of last liquid cold drawing 21 and battery module, put into holding tank 11 in box 1 with the battery module, holding tank 11 can set up according to the quantity of battery module, the shape of holding tank 11 is also unanimous with the shape of battery module, the battery module installation back, the top installation of going up liquid cold drawing 21 laminating battery module, then will lap the top of laminating in last liquid cold drawing 21, and then lap and box 1 fixed connection back, fix battery module and last liquid cold drawing 21 in box 1's holding tank 11 in proper order, in specific embodiment, set up the division board between holding tank 11, set up in apron complex mounting structure on the division board, for example, the bolt hole, be favorable to the stability of battery box 100 structure through setting up a plurality of mounting structure.

According to the utility model discloses battery box 100 installs battery module and last liquid cold drawing 21 in battery box 100 through the detachable connected mode, and the convenience is in the disassembling and the echelon utilization of follow-up in-use battery module, replaces the structure in the past to glue through detachable connection structure, has further guaranteed the inflation clearance of reserving between the electric core, prevents that the structure from gluing the overflow and filling the inflation clearance. Install battery module and last liquid cold drawing 21 in battery box 100 through detachable mode, in battery module and last liquid cold drawing 21 are whole to be fixed in battery box 100 through the apron, simple structure, the installation of being convenient for, safe and reliable goes up the setting of liquid cold drawing 21 laminating battery module, goes up the coolant liquid in the liquid cold drawing 21 and carries out the heat absorption cooling to battery module, improves battery module's radiating efficiency.

As shown in fig. 1, 2 and 3, further, the receiving groove 11 includes a first receiving groove 111 and a second receiving groove 112 spaced apart in the width direction of the battery box 100, the upper liquid-cooling plate 21 includes a first liquid-cooling plate 211 opposite to the first receiving groove 111 and a second liquid-cooling plate 212 opposite to the second receiving groove 112, and the cover plate is disposed over the first liquid-cooling plate 211 and the second liquid-cooling plate 212, or the cover plate includes a first cover plate 31 and a second cover plate 32, the first cover plate 31 is disposed over the first liquid-cooling plate 211, and the second cover plate 32 is disposed over the second liquid-cooling plate 212; in a specific embodiment, the battery modules are disposed on two sides of the battery box 100, and a gap through which the copper bar passes is left between the battery modules, so that the accommodating groove 11 is configured as a first accommodating groove 111 and a second accommodating groove 112 according to the layout of the battery modules, similarly, the upper liquid cooling plate 21 is also configured according to the arrangement of the battery modules, the first liquid cooling plate 211 and the second liquid cooling plate 212 of the upper liquid cooling plate 21 are respectively attached to the battery modules on the two sides, further, the cover plate for attaching the battery module and the upper liquid cooling plate 21 to the battery box 100 is also configured as a first cover plate 31 and a second cover plate 32, the first cover plate 31 attaches the first liquid cooling plate 211 to the battery module and mounts the second liquid cooling plate 212 to the battery box 100, and a gap through which the copper bar passes is also left between the first liquid cooling plate 211 and the second liquid cooling plate 212, and between the first cover plate 31 and the second cover plate 32. The battery module is installed in battery box 100, and the battery module comprises a plurality of conductive component, sets up a plurality of interval installation regions in battery box 100 and is used for installing conductive component, can promote the stability and the compactness of battery module installation. Further, the upper liquid-cooling plate 21 and the lower liquid-cooling plate 22 are formed by stamping; and the processing mode of punch forming is adopted, so that the production efficiency of the cooling system is improved.

As shown in fig. 1, 2 and 5, further, a plurality of first weight-reducing slots 33 are formed in the cover plate, and the plurality of first weight-reducing slots 33 are spaced apart along the length direction of the cover plate and/or the width direction of the cover plate, wherein each first weight-reducing slot 33 penetrates through the cover plate; in a specific embodiment, the shape of the cover plate is consistent with the shape of the upper liquid cold plate 21, and the peripheral edge of the cover plate is attached to the edge of the upper liquid cold plate 21, specifically, the first cover plate 31 is attached to the edge of the first liquid cold plate 211 to fix the first liquid cold plate on the battery box 100, and the second cover plate 32 is attached to the edge of the second liquid cold plate 212 to fix the second liquid cold plate on the battery box 100, further, in order to reduce the weight of the battery box 100, the center of the cover plate is provided with a plurality of first weight reduction grooves 33, and the weight of the cover plate can be effectively reduced by the arrangement of the first weight reduction grooves 33, and the weight of the battery box 100 can also be further reduced.

As shown in fig. 4, 6 and 7, further, a support 5 is further included, a spacing space is provided between the cover plate and the box body 1, and the support 5 is located in the spacing space to space the cover plate from the box body 1; the crossbeam that has cooperation holding tank 11 to arrange in box 1, the battery module is installed in box 1 back, the height of crossbeam is compared in the height of battery module and is lower, when liquid cold plate 21 was fixed in box 1 with it and battery module in the apron laminating, certain interval still has between apron and the box 1, fill this interval through setting up support piece 5, can effectively connect apron and box 1 through support piece 5, strengthen the power of being connected between apron and the box 1, will go up liquid cold plate 21 and battery module firm the installation in box 1.

As shown in fig. 4, 6 and 7, further, the supporting member 5 includes a supporting plate 51, at least one second weight-reducing groove is formed in the supporting plate 51, at least one reinforcing rib 52 is formed in each second weight-reducing groove, and the reinforcing rib 52 extends in the thickness direction of the box body 1; in a specific embodiment, the structure of the supporting member 5 includes a supporting plate 51 connecting the cover plate and the box body 1, and mounting structures respectively connected to the cover plate and the box body 1 are disposed on the supporting plate 51, in a further embodiment, the supporting plate 51 may be configured as a solid plate, and reinforcing ribs 52 for improving the structural strength are disposed on the solid plate, in other embodiments, a second weight-reducing slot for reducing the weight of the supporting member 5 may also be disposed on the supporting plate 51, and the reinforcing ribs 52 are disposed in the second weight-reducing slot for enhancing the structural strength of the supporting member 5.

As shown in fig. 1 and 5, further, a first beam 12 is formed in the receiving groove 11, and the support 5 is located between the first beam 12 and the cover plate; in specific embodiment, set up first crossbeam 12 in the box 1 and separate into a plurality of holding tanks 11 with its inside holding tank 11 and cooperate with the battery module, in specific embodiment, the quantity of first crossbeam 12 is corresponding with the battery module, an apron for fixing battery module and last liquid cold plate 21, realize being connected with box 1 through being connected of support piece 5 and crossbeam, specifically, set up mounting structure in support piece 5's both sides, mounting structure here can be the bolt hole, corresponding set up the bolt hole on apron and first crossbeam 12, the apron passes through the bolt hole and is connected with support piece 5's one end bolted connection, support piece 5's the other end and first crossbeam 12 bolted connection, and then make the apron be connected with box 1, the apron is fixed in battery module and last liquid cold plate 21 in box 1.

As shown in fig. 5, 6 and 7, further, a first connecting portion 53 is formed at one end of the supporting member 5 adjacent to the first cross member 12, and a second connecting portion 13 matched with the first connecting portion 53 is formed on the first cross member 12; a third connecting part 54 is formed at one end of the supporting part 5 adjacent to the cover plate, and a fourth connecting part 34 matched with the third connecting part 54 is formed on the cover plate; in a specific embodiment, a first connecting portion 53 and a second connecting portion 13 are disposed at two ends of the supporting member 5, wherein the first connecting portion 53 is matched with a third connecting portion 54 of the first beam 12, and the second connecting portion 13 is matched with a fourth connecting portion 34 on the cover plate, in a specific embodiment, the first connecting portion 53, the second connecting portion 13, the third connecting portion 54 and the fourth connecting portion 34 may be bolt holes, in a specific installation process, bolts sequentially penetrate through the first connecting portion 53 and the third connecting portion 54 to connect the first beam 12 with the supporting member 5, and bolts sequentially penetrate through the second connecting portion 13 and the fourth connecting portion 34 to connect the cover plate with the supporting member 5, so that the supporting member 5 fixedly connects the cover plate with the box 1.

As shown in fig. 4, 6 and 7, further, a second cross beam 14 is formed in the receiving groove 11, a fifth connecting portion 15 is formed on the second cross beam 14, and a sixth connecting portion 35 matched with the fifth connecting portion 15 is formed on the cover plate; in a specific embodiment, the connection between the cover plate and the box body 1 is divided into a front part and a rear part, the connection part located at the front side is fixed by the connection between the fourth connection part 34 and the second connection part 13, the connection part located at the rear side of the cover plate is fixed by the fifth connection part 15 and the sixth connection part 35, the second beam 14 can be directly disposed on the sidewall of the box body 1, the sidewall of the box body 1 can also be directly used as the second beam 14, the fifth connection part 15 is disposed on the sidewall of the box body 1, and the cover plate is connected with the box body 1 through the sixth connection part 35 on the cover plate.

As shown in fig. 5, 6 and 7, further, the battery box 100 further includes a fixing member 6, the fifth connecting portion 15 and the sixth connecting portion 35 are each configured as a fixing hole 351 engaged with the fixing member 6, and the fixing member 6 is engaged with the fifth connecting portion 15 and the sixth connecting portion 35 in turn to fix the cover plate to the box body 1; set up the fixed orifices 351 that is used for connecting the two on fifth connecting portion 15 and sixth connecting portion 35, this fixed orifices 351 can be the through-hole, the corresponding connecting rod of cooperation is connected apron and box 1, fixed orifices 351 can also be the screw hole, connect apron and box 1 through the bolt, in addition, can also cooperate other mounting 6 of use on the fixed orifices 351, for example the buckle, do not list one by one here, the structure between apron and the box 1 that the connection structure through fixed orifices 351 is more firm, improve the stability of battery box 100 work, also be favorable to prolonging battery box 100's life.

As shown in fig. 4, 6 and 7, further, the battery box 100 further includes a lower liquid cooling plate 22, and the lower liquid cooling plate 22 is integrally formed with the box body 1 to configure a bottom wall of the box body 1; in a specific embodiment, the lower liquid cooling plate 22 attached to the bottom wall of the battery module is arranged at the bottom of the battery box 100, the battery module is cooled in a manner that the upper liquid cooling plate 21 and the lower liquid cooling plate 22 are matched, the structure of the double-layer liquid cooling plate can more efficiently dissipate heat, and meanwhile, under the condition of lower environmental temperature in winter, the upper liquid cooling plate 21, the lower liquid cooling plate 22 and the battery module form a sandwich structure, so that the heat insulation performance of the battery pack can be further improved; through the compact cooperation of upper liquid cooling plate 21 and lower liquid cooling plate 22, effectively utilize the space in battery box 100, improved the holistic rigidity of battery package and mode. The liquid cooling scheme can enable the battery to work in a proper temperature range all the time, and the condition that the temperature is out of control or the battery is suddenly powered off is avoided. The better inside difference in temperature control with battery module is good, and the temperature uniformity is better, all can produce positive influence to the performance and the life of battery, and the form of arranging on upper and lower layers produces further positive influence to the battery module difference in temperature, and compact structure is favorable to spatial arrangement.

As shown in fig. 1 and fig. 3, further, a first flow passage and a second flow passage are respectively formed in the first liquid cooling plate 211 and the second liquid cooling plate 212; in some embodiments, the first liquid cooling plate 211 and the second liquid cooling plate 212 are provided with a first flow channel and a second flow channel for flowing a cooling liquid, and the cooling liquid absorbs heat dissipated by the battery module while flowing through the first flow channel and the second flow channel, in one embodiment, the first flow channel and the second flow channel are arranged in a convoluted and zigzag S shape, the cooling liquid flows in the S-shaped flow channel, the S-shaped flow channel enables the cooling liquid to stay in the battery module for a longer time, so that more heat can be absorbed, heat dissipation of the battery module is facilitated, the temperature difference inside the battery module is further reduced due to the optimized design of the flow channel shape, thermal nonuniformity of the battery module is improved, the first flow channel and the second flow channel are arranged in an S-shaped flow channel, the flow rate is lower compared with that of a single-pass direct-flow channel, and the flow channel has a smaller cross-sectional area compared with a multi-pass direct-flow channel, and the internal space of the battery pack can be more efficiently utilized in a compact battery pack. When the cooling liquid with the same flow is provided, the flow speed of the cooling liquid in the S-shaped flow channel is reduced under the blocking of the stop block, the probability of forming turbulent flow is higher, and the improvement of the heat exchange efficiency between the cooling liquid and the flow channel is facilitated. Compared with a direct-current pipeline, the S-shaped flow channel is longer, so that more inflection points cause more shape resistance, the pressure drop of an inlet and an outlet is larger, more energy loss is caused, and a power device can be provided for the flowing of cooling liquid.

As shown in fig. 1, fig. 2 and fig. 4, further, a liquid inlet assembly is further included in the battery box 100, and the liquid inlet assembly includes: the liquid inlet pipe comprises a first liquid inlet pipe, a first branch pipe and a second branch pipe, wherein one end of the first liquid inlet pipe is communicated with the external liquid inlet pipe, and the other end of the first liquid inlet pipe is communicated with the first flow channel through the first branch pipe and communicated with the second flow channel through the second branch pipe; the first liquid inlet pipe, the first branch pipe and the second branch pipe are interconnected and communicated, external cooling liquid flows into the first liquid inlet pipe, one end, far away from a cooling liquid inlet, of the first liquid inlet pipe is communicated with the first branch pipe and the second branch pipe, in a specific embodiment, one end, far away from the first liquid inlet pipe, of the first branch pipe is communicated with the first flow channel, furthermore, a connecting port connected with the first branch pipe is arranged on the first liquid cooling plate 211, one end, far away from the first liquid inlet pipe, of the second branch pipe is communicated with the second flow channel, further, a connecting port connected with the second branch pipe is arranged on the second liquid cooling plate 212, in sum, after the cooling liquid flows into the first liquid inlet pipe, the cooling liquid flows into the first flow channel of the first branch pipe, the cooling liquid flowing into the second flow channel of the second branch pipe enters the second flow channel of the second cooling liquid, the cooling liquid flowing into the first liquid cooling plate 211 and the second liquid cooling plate 212 respectively absorbs heat to cool the battery module, and the heat dissipation efficiency of the battery module is improved.

As shown in fig. 1, 2 and 4, further, the battery box 100 further includes: the first valve body comprises a first valve port, a second valve port and a third valve port, the first liquid inlet pipe, the first branch pipe and the second branch pipe are respectively communicated with the first valve port, the second valve port and the third valve port, and at least one of the first valve port, the second valve port and the third valve port is provided with a valve switch so as to control the flow of the first valve port, the second valve port or the third valve port. In one embodiment, the first valve body is an electronic three-way valve, and the flow rates of the first valve port, the second valve port and the third valve port are adjusted by the electronic three-way valve, wherein the first valve port is used for adjusting the inflow rate of the cooling liquid, the second valve port is used for adjusting the inflow rate of the first liquid cooling plate 211, the third valve port is used for adjusting the inflow rate of the second liquid cooling plate 212, and the flow rates of the cooling liquid in the first liquid cooling plate 211 and the second liquid cooling plate 212 are made to be consistent by adjusting the second valve port and the third valve port, so that the temperature of the battery module is more uniformly reduced.

According to the battery box 100 of the embodiment of the present invention, in the specific installation process of the upper liquid cooling plate 21 and the battery module, the battery module is placed in the accommodating groove 11 in the box 1, the accommodating groove 11 can be set according to the number of the battery modules, the shape of the accommodating groove 11 is also consistent with the shape of the battery module, after the battery module is installed, the upper liquid cooling plate 21 is attached to the top of the battery module, then the cover plate is attached to the top of the upper liquid cooling plate 21, and further, after the cover plate is fixedly connected to the box 1, the battery module and the upper liquid cooling plate 21 are sequentially fixed in the accommodating groove 11 of the box 1, in the specific embodiment, a separation plate is disposed between the accommodating grooves 11, a cover plate-fit installation structure, such as a bolt hole, is disposed on the separation plate, which is favorable for the stability of the structure of the battery box 100 by disposing a plurality of installation structures, the installation structure herein can connect the cover plate and the box 1 by disposing the support member 5, a cross beam can be disposed in the box 1, on the one hand, an installation portion can be provided for the support member 5, on the other hand, the small accommodating groove 11 can also be divided into a plurality of small accommodating grooves 11, which is convenient for installing the battery module; the installation parts are arranged at the corresponding positions of the support part 5, the cover plate, the first cross beam 12 and the second cross beam 14, the support part 5 and the cover plate, the support part 5 and the first cross beam 12, the support part 5 and the second cross beam 14 are sequentially connected through the installation parts, the cover plate is fixedly installed on the box body 1, the battery module and the upper liquid cooling plate 21 are fixedly installed between the cover plate and the box body 1, and the battery module is fixedly installed in the box body 1.

According to the utility model discloses battery box 100, the battery module is installed in battery box 100, battery box 100 set to with battery module matched with shape, the upper and lower surface that is located the battery module sets up liquid cold drawing 21 and lower liquid cold drawing 22, it is used for absorbing the heat to the upper portion of battery module to go up liquid cold drawing 21, lower liquid cold drawing 22 is used for absorbing the heat to the lower part of battery module, lower liquid cold drawing 22 sets to the structure with battery box 100 bottom plate integrated into one piece, be favorable to battery box 100's spatial arrangement, it makes the heat dissipation of battery module more even to go up liquid cold drawing 21 and lower liquid cold drawing 22's cooperation, the temperature uniformity is better, performance and the life to the battery all can produce positive influence. Go up the runner in liquid cold plate 21 and the lower liquid cold plate 22 and set "S" type runner to, be favorable to prolonging the coolant liquid and stop the time on battery module surface, it is more high-efficient to the heat absorption of battery module, is favorable to guaranteeing the security performance and the working property of battery package, and the design of "S" type runner aims at reducing the inside maximum difference in temperature of battery, can improve its hot inhomogeneities, can improve the hot homogeneity of different batteries in the same module of battery module. Install battery module and last liquid cold drawing 21 in battery box 100 through detachable connected mode, the convenience replaces the structure in the past through detachable connection structure and glues with the echelon utilization in the disassembly and the echelon of follow-up in-use battery module, has further guaranteed the inflation clearance of reserving between the electric core, prevents that the overflow is glued to the structure and fills the inflation clearance. Install battery module and last liquid cold drawing 21 in battery box 100 through detachable mode, in battery module and last liquid cold drawing 21 are whole to be fixed in battery box 100 through the apron, simple structure, the installation of being convenient for, safe and reliable goes up the setting of liquid cold drawing 21 laminating battery module, goes up the coolant liquid in the liquid cold drawing 21 and carries out the heat absorption cooling to battery module, improves the radiating efficiency of battery module. Install battery module and last liquid cold drawing 21 in battery box 100 through the apron, effectively utilize the space in the battery box 100, improved the holistic rigidity of battery package and mode, this kind of mounting means liquid more is favorable to the battery to work all the time in suitable temperature range, avoids appearing the condition that the temperature is out of control or falls the electricity suddenly. The better inside difference in temperature with battery module control is good, and the temperature uniformity is better, all can produce positive influence to the performance and the life of battery, and the form of arranging of upper and lower layer produces further positive influence to the battery module difference in temperature, and compact structure is favorable to the spatial arrangement.

Other configurations and operations of the battery box 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present specification, reference to the description of "some embodiments," "optionally," "further" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery case (100), comprising:

the battery box comprises a box body (1), wherein the box body (1) comprises a containing groove (11) for containing a battery module;

the cooling assembly (2) comprises an upper liquid cooling plate (21), and the upper liquid cooling plate (21) is positioned on the accommodating groove (11) so as to cool the battery module in the accommodating groove (11);

the cover plate is located on one side, deviating from the box body (1), of the upper liquid cooling plate (21), and the cover plate is detachably fixedly connected with the box body (1) and used for pressing the upper liquid cooling plate (21) on the battery module.

2. The battery box (100) of claim 1, wherein the receiving slot (11) comprises a first receiving slot (111) and a second receiving slot (112) spaced apart along a width of the battery box (100), the upper liquid cold plate (21) comprises a first liquid cold plate (211) opposite the first receiving slot (111) and a second liquid cold plate (212) opposite the second receiving slot (112),

the cover plate covers and is established first liquid cold drawing (211) and second liquid cold drawing (212) top, perhaps the apron includes first apron (31) and second apron (32), first apron (31) lid is established the top of first liquid cold drawing (211), second apron (32) lid is established the top of second liquid cold drawing (212).

3. The battery box (100) according to claim 1 or 2, wherein a plurality of first lightening slots (33) are formed on the cover plate, the plurality of first lightening slots (33) are spaced apart along a length direction of the cover plate and/or a width direction of the cover plate, wherein each first lightening slot (33) penetrates through the cover plate.

4. The battery box (100) according to claim 1, further comprising a support (5) having a spacing space between the cover plate and the box body (1), the support (5) being located in the spacing space to space the cover plate from the box body (1).

5. The battery box (100) according to claim 4, wherein the support member (5) comprises a support plate (51), at least one second weight-reducing groove is formed in the support plate (51), at least one reinforcing rib (52) is formed in each second weight-reducing groove, and the reinforcing rib (52) extends in the thickness direction of the box body (1).

6. The battery box (100) according to claim 4, characterized in that a first cross member (12) is formed in the receiving groove (11), and the support member (5) is located between the first cross member (12) and the cover plate.

7. The battery box (100) of claim 6,

a first connecting part (53) is formed at one end of the supporting part (5) adjacent to the first cross beam (12), and a second connecting part (13) matched with the first connecting part (53) is formed on the first cross beam (12);

one end of the supporting piece (5) adjacent to the cover plate is provided with a third connecting part (54), and a fourth connecting part (34) matched with the third connecting part (54) is formed on the cover plate.

8. The battery box (100) according to claim 1, wherein a second cross member (14) is formed in the receiving groove (11), a fifth connecting portion (15) is formed on the second cross member (14), and a sixth connecting portion (35) which is engaged with the fifth connecting portion (15) is formed on the cover plate.

9. The battery box (100) according to claim 8, further comprising a fixing member (6), wherein the fifth connecting portion (15) and the sixth connecting portion (35) are each configured as a fixing hole (351) engaged with the fixing member (6), and wherein the fixing member (6) is engaged with the fifth connecting portion (15) and the sixth connecting portion (35) in turn to fix the cover plate to the box body (1).

10. The battery box (100) of claim 1, further comprising a lower liquid cold plate (22), the lower liquid cold plate (22) being integrally formed with the box body (1) to configure a bottom wall of the box body (1).

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