CN216563295U - Small-size discrete battery box and combination formula battery box - Google Patents

Abstract

The utility model relates to a small-sized discrete battery box, which comprises a box body, a battery pack and a temperature management unit, wherein the battery pack comprises a battery box body and a battery box body; the temperature management unit comprises a gravity heat discharging assembly, a semiconductor refrigerating assembly and a temperature control module; the temperature management unit adaptively regulates and controls the temperature according to the temperature of the working environment of the battery, the heating sheet is used for heating at low temperature, and the gravity heat drain is used as a temperature conduction medium to horizontally transfer heat to the battery packs at two sides to heat the battery; starting the semiconductor refrigeration assembly at high temperature, transferring heat to the semiconductor refrigeration assembly from bottom to top through the heat conduction performance of the gravity heat bar, absorbing and cooling the heat transferred by the gravity heat bar by using the semiconductor refrigeration assembly, and reducing the temperature of the battery; the battery box is provided with the heat preservation intermediate layer for during external heat can't transmit the inner box, guarantee that the group battery does not receive ambient temperature's influence at the during operation, system work energy consumption greatly reduced, the security of battery work promote by a wide margin moreover.

Description

Small-size discrete battery box and combination formula battery box

Technical Field

The utility model relates to the technical field of battery application, in particular to a small-sized discrete battery box and a combined battery box.

Background

The energy storage battery in the current market is applied by integrating a battery, a BMS, a PCS and an EMS, and the problem that the battery is easy to ignite and explode when firing is difficult to solve due to the fact that all the battery cells are concentrated together in the integrated solution; meanwhile, the heat dissipation of the battery and the control component in the energy storage cabinet is realized, the heat dissipation device needs to be started within 24 hours, and the energy consumption is large; moreover, the integrated energy storage system is fixed and cannot be moved, which is very inconvenient for the emerging battery leasing mode which requires convenient product moving transition. Therefore, in the future, the development of the energy storage battery needs to fully consider the fusion design of the internal structure and the external structure of the battery, and the innovative development of some structures reduces the pressure of cost and safety of an external system, which is an important direction for the structural technology research of the energy storage battery in the future, and the energy storage battery is expected to achieve the aims of low cost, long service life and high safety.

At present, the technology of heat dissipation of a battery module is relatively mature, but many problems still exist in the aspects of energy consumption, structure, heat dissipation effect and the like, and further solution is needed.

Patent CN103199316B discloses a battery pack and a heat dissipation structure thereof, which includes: the semiconductor heat exchange device comprises a semiconductor heat exchange device and two temperature equalizing plates, wherein the two temperature equalizing plates are overlapped into a door-shaped structure by using heat pipes, a PEC is placed at the top of the middle part of the temperature equalizing plates to form a heat dissipation system, and the heat dissipation system is inserted into a battery assembly during use to conduct heat of a battery. This patent uses the mode of aluminium base board heating pipe to constitute the samming board, and need get up its overlap joint with the heat pipe, and manufacturing cost is higher, and processing is inconvenient. And need the battery according to different width tailor the samming board overlap joint subassembly of different width, the commonality is not high.

Patent CN103715473A discloses a power battery thermal management system, which is a battery cooling scheme combining a heat pipe, a semiconductor refrigeration component and a liquid circulation device. The heat pipe is connected with a liquid circulation device, the liquid circulation device transfers heat to the semiconductor refrigeration assembly, and the heat is dissipated by the semiconductor refrigeration assembly. The scheme has the advantages of complex structure, inconvenient maintenance, higher cost, more connection points for connecting a plurality of heat pipes with the liquid circulating device, and easy occurrence of the problems of untight connection and increased thermal resistance.

Patent CN207602734U discloses a power battery thermal management system, and specific scheme is that the battery box is the individual layer barrel, uses the battery to soak in paraffin, uses heat pipe heating semiconductor refrigeration subassembly to assist the refrigeration simultaneously, and cabinet body inside disposes heat preservation and flame retardant coating. According to the scheme, the heat pipe is inserted into the phase-change material, and the semiconductor refrigeration assembly is used for refrigerating the phase-change material, so that the battery is cooled indirectly. Because the latent heat of the phase-change temperature point of the phase-change material is very large, the semiconductor refrigeration assembly needs to work for a long time to dissipate the heat absorbed by the phase-change material, so that the energy consumption is high, and meanwhile, the operation life of the semiconductor refrigeration assembly is influenced to a certain extent.

The patent CN109841927A is suitable for a thermal management device for a power battery of an electric vehicle in a severe cold region, and the thermal management device is a battery placing part for placing a battery in an insulation box, and a heat absorbing part and a battery temperature detecting element of a cooling device are attached to the battery; when the battery temperature detection element detects that the temperature of the battery is too high during working, the cooling device is started to start cooling, the heat absorption part of the cooling device absorbs heat and transmits waste heat to the heat dissipation part, and then the heat dissipation part volatilizes the waste heat to the outside of the heat insulation box body; when the battery temperature detection element works, the battery temperature detection element detects that the temperature of the battery is too low, the cooling work is stopped, and heat generated by continuous heating of the battery is accumulated in the heat insulation box body. This kind of structure, when the ambient temperature is low excessively, especially severe cold district, only lean on the heat preservation box to keep warm, if the battery does not continuously work the time box is the same with ambient temperature, consequently, it has only solved the too high problem of battery temperature, and can't solve to the problem that the temperature is lower or the battery can't normally work when discontinuous work, moreover this scheme only is directed at power battery's thermal management, this management mode is totally unable applicable to energy storage battery.

Therefore, certain technical defects still exist in the current thermal management problem of the battery, and particularly, the heat dissipation, fire protection and high energy consumption aspects of the energy storage battery are still to be further researched and improved.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to provide a small-sized discrete battery box, which realizes low-energy consumption temperature management and achieves the purposes of safety, energy conservation and high efficiency of the battery box.

The utility model also aims to provide a combined battery box which is formed by combining small-sized discrete battery boxes, fully utilizes the advantages of the small-sized discrete battery boxes and further realizes the purpose of high-capacity energy storage.

The utility model also aims to provide a low-energy-consumption temperature management method of the discrete battery box, so as to realize the purposes of energy conservation and consumption reduction of the discrete battery box.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a small-sized discrete battery box comprises a box body, wherein the box body comprises an inner box and a shell arranged outside the inner box, and a heat-insulating interlayer is formed between the inner box and the shell; the battery pack is arranged in the inner box, and the temperature management unit is arranged outside the inner box in the shell;

the temperature management unit comprises a gravity heat-extraction component, a semiconductor refrigeration component and a temperature control module; the gravity heat dissipation assembly and the semiconductor refrigeration assembly are respectively and electrically connected with the temperature control module; the condensation end of the gravity hot-row component is connected with the semiconductor refrigeration component, the semiconductor refrigeration component is arranged on the outer side of the inner box, and the heat transfer end of the gravity hot-row component penetrates through a gap between adjacent battery packs from one side of the inner box to extend to the other side of the inner box.

Further inject, the hot subassembly of arranging of gravity includes the hot row of gravity and heating plate, the heating plate sets up and forms sandwich structure between two liang of hot rows of gravity, the heating plate is connected with temperature control module, the condensation end and the semiconductor refrigeration subassembly of the hot row of gravity are connected, through the heating plate heating, arrange the transmission for the group battery through the gravity heat, also can utilize the hot heat of arranging of gravity to conduct heat, with the heat transfer to the semiconductor refrigeration subassembly of group battery, utilize the refrigeration of semiconductor refrigeration subassembly, cool down the group battery.

Further limiting, the gravity heat row is L-shaped, and the horizontal end of the gravity heat row is a condensation end and is connected with the semiconductor refrigeration assembly; the vertical end of the gravity heat row is a gap through which the heat transfer end penetrates between the battery packs.

Further inject, the shell inner chamber still is equipped with gaseous collection chamber in the outside of inner box or the shell outside, gaseous collection intracavity is provided with gaseous collection unit, gaseous collection unit is including the adsorbed layer and the collection layer of range upon range of setting, collects cooling treatment back adsorption treatment to the gas of exploding of letting out of inner box, reaches preliminary purification purpose.

Further limiting, the adsorption layer is one or a mixture of more of ceramic balls, activated carbon, molecular sieves, adsorption resin and graphite; the collection layer is a closed gas collection bag or a high-combustion gas ignition assembly.

Further limiting, reserving a gap between the inner wall of the inner box and the battery pack to form an explosion venting channel; the explosion venting channel is communicated with the air inlet of the gas collecting cavity through a gas transmission pipe, and the explosion venting gas is discharged through the explosion venting channel.

Further limiting, a heat dissipation cavity is further arranged outside the inner box or outside the shell in the inner cavity of the shell, the heat dissipation cavity is arranged between the inner box and the gas collection cavity, and the semiconductor refrigeration assembly is arranged in the heat dissipation cavity; the side wall of the heat dissipation cavity is provided with a waterproof and dustproof assembly; the gas transmission pipe penetrates through the heat dissipation cavity and extends to the gas collection cavity.

Further inject, still be provided with the connection control chamber on the box, be provided with the connection control subassembly in the connection control chamber.

Further limiting, the heat-insulating interlayer is filled with heat-insulating cotton or phase-change material with a phase-change temperature point of 37 ℃, or ceramic balls or activated carbon.

Further limiting, the battery pack comprises a plurality of columns of batteries which are vertically arranged, every two adjacent batteries in the horizontal direction are placed back to back, the two columns of batteries which are vertically arranged are separated by the gravity hot-row assembly, and the two adjacent batteries are separated by the partition board.

Further inject, the box sets up on the base, the below of base is provided with a plurality of roller groups, is convenient for on-the-spot installation, removal, on-the-spot maintenance.

The application also provides a combined battery box, which comprises a plurality of small-sized discrete battery boxes, wherein the small-sized discrete battery boxes are spliced through cable terminals.

Compared with the prior art, the utility model has the beneficial effects that:

1) the temperature control system formed by combining the unique structure of the box body and the temperature management unit is fully utilized, the temperature management unit adaptively regulates and controls the temperature according to the temperature of the working environment of the battery, the heating plate is used for heating at low temperature, and the gravity heat radiator is used as a temperature conduction medium to horizontally transfer heat to the battery packs on two sides to heat the battery; start semiconductor refrigeration subassembly when high temperature, the heat conductivility of arranging through gravity heat is transmitted the heat to semiconductor refrigeration subassembly from bottom to top, utilize semiconductor refrigeration subassembly to arrange the heat absorption cooling of transmission with gravity heat, and then reduce battery temperature, the regulation and control temperature in-process effectively utilizes the heat preservation intermediate layer to keep warm to the inner box, make during external heat can't transmit the inner box, guarantee that the group battery does not receive external temperature's influence at the during operation, and system work energy consumption greatly reduced, the security of battery work promotes by a wide margin.

2) The battery explosion venting device is also provided with a gas collecting unit, so that high-temperature gas released by battery explosion venting can be absorbed and collected after air cooling, the release of part of toxic and harmful gas is avoided, the environmental pollution is avoided, meanwhile, the explosion venting gas is effectively collected, the secondary utilization of the explosion venting gas is facilitated, and the resource treatment is realized.

3) The discrete battery box can be used independently or in combination according to the use scene, and the connection control unit is configured, so that the combined use can be realized, the high-capacity energy storage can be realized, and the application is flexible.

4) The gravity heat bar assembly of the utility model is characterized in that the gravity heat bar and the heating sheet are arranged to form a sandwich structure, namely, the gravity heat bar realizes horizontal heating in heating and vertical heat transfer from bottom to top in refrigeration, so that the heat of the battery module is released, the installation space can be saved, more importantly, the uniform heat transfer can be ensured, and the uniform heating of the battery can be realized.

5) The utility model integrates the functions of heat dissipation, fire protection, energy management and the like, and each function can be realized by independent operation, thereby meeting the requirements of battery safety, energy conservation and high efficiency of the battery box and having considerable use value for field safety and daily maintenance.

Drawings

For ease of illustration, the utility model is described in detail by the following detailed description and the accompanying drawings.

Fig. 1 is a schematic view of the overall structure of the battery box of the present invention.

Fig. 2 is an exploded view of the battery box according to the present invention.

Fig. 3 is an assembled sectional view of a battery pack and a temperature management unit according to the present invention.

FIG. 4 is a schematic diagram of a temperature management assembly of the present invention.

FIG. 5 is an exploded view of the gravity heat rejection assembly of the present invention.

Description of reference numerals: 1-a battery case; 11-front and rear panels; 12-side panels; 13-a splint; 14-a mounting plate; 15-a base; 16-a caster wheel; 17-a separator; 18-venting explosion channel; 19-heat preservation interlayer; 2-a temperature management unit; 21-gravity thermal drain assembly, 211-gravity thermal drain; 212-semiconductor refrigeration components; 213-heating plate; 22-a heat dissipation cavity; 221-waterproof shutters; 222-a dust prevention assembly; 3-connecting a control cavity; 4-a gas collection chamber; and 5-a battery pack.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are only a subset of, and not all embodiments of the application. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a device comprising a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such device.

The features and properties of the present application are described in further detail below with reference to examples.

As shown in fig. 1 to 5, the small-sized discrete battery box of the present application includes a battery box body 1, a temperature management unit 2 and a battery pack 5, wherein the box body 1 is composed of three parts, namely an outer shell, an inner box and a base 15, as shown in fig. 2, the outer shell is composed of a front panel 11, a rear panel 11 and side panels 12 distributed on two sides, the front panel 11, the rear panel 11 and the side panels 12 are respectively fixedly connected with the base 15 through bolts, and sealing strips are installed at connecting gaps between the front panel 11 and the rear panel 12 to perform a sealing function. The inner box is also formed by assembling a front clamping plate 13, a rear clamping plate 13, mounting plates 14 on the left side and the right side and end plates at the top, the mounting plates 14 and the clamping plates 13 are also fastened on a base 15 through screws at the lower ends, and sealing strips are respectively arranged between the mounting plates 14 and the clamping plates 13 and between the end plates and the clamping plates 13 and the mounting plates 14, so that the inner box and the outer shell are completely sealed and isolated.

The inner box and the outer shell are fixed on the same base 15 through bolts, and a certain distance is reserved between the inner box and the outer shell to form a heat preservation interlayer 19 for heat insulation of the battery. The heat insulation interlayer 19 between the outer shell and the inner box can be also internally provided with heat insulation materials (such as heat insulation cotton, and the like, and the surface of the heat insulation interlayer can be provided with aluminum foil for reflecting external heat radiation); phase change materials (such as high thermal conductivity paraffin, preferably 37 c) may also be added to further assist in battery heat dissipation and temperature preservation, thereby reducing the operating time of the temperature management unit 2. Similarly, sealing strips are provided between the inner and outer casings and the base 15 to provide sealing. To facilitate removal and field installation of the battery box, a caster 16 may also be provided on the base 15.

The battery pack 5 is arranged in the inner box, as shown in fig. 3, the battery pack 5 is 16 battery cells, and the 16 battery cells can be arranged in two vertical rows of 8 × 2 and arranged back to back. Corresponding partition plates 17 are arranged in the inner box according to the number of the batteries, the batteries are arranged on the partition plates 17, namely every two adjacent batteries are horizontally placed back to back, the two adjacent batteries are separated by the partition plates 17, and the partition plates 17 are connected with the battery clamping plates 1313 through bolts.

It should be further explained that the number of the battery cells placed in the inner box can be adjusted according to the size and specification of the inner box, and the placement position can also be adjusted according to the actual situation, such as the above 16 battery cells can also be placed according to 4 × 4, and can also be placed according to the front and back 4 × 2 × 2, as long as the placement position of the battery cells can meet the requirements of safety and reasonableness. The two adjacent columns are preferably placed back to back for easy connection of the positive and negative cables. A certain gap is left between the battery cell and the mounting plate 14 of the inner box, and the gap can be used as a wiring space and also can be used as an explosion venting channel 18 of gas.

A heat dissipation cavity 22 is separated above an inner box end plate in the inner cavity of the shell, part of components of the temperature management unit 2 are installed in the heat dissipation cavity 22, the temperature management unit 2 comprises a gravity hot-row 211 component 21, a semiconductor refrigeration component 212 and a temperature control module, and the gravity hot-row 211 component 21 and the semiconductor refrigeration component 212 are respectively and electrically connected with the temperature control module; the temperature control module can be integrated in a BMS system of the battery box and is mainly used for identifying the temperature of the battery working environment of the inner box and feeding a temperature signal back to the controller to complete the temperature regulation and control instruction, and the temperature control module can be realized by adopting a conventional temperature control module. Referring to fig. 2, 4 and 5, semiconductor cooling assembly 212 is mounted within heat dissipation chamber 22 and is primarily used to cool gravity heat rejection 211 assembly 21. In order to keep the ventilation in the heat dissipation cavity 22, air inlet and outlet holes are formed in two side walls of the heat dissipation cavity 22, and a waterproof louver 221 and a dustproof assembly 222 are respectively arranged, so that air inlet can be guaranteed, and meanwhile, the purpose of protection is achieved. The gravity hot row 211 assembly 21 is composed of a gravity hot row 211 and heating sheets 213, the heating sheets 213 are arranged between every two gravity hot rows 211 to form a sandwich structure, the heating sheets 213 are made of aluminum alloy or other heat-conducting materials, are connected with the temperature control module, and can be controlled by the temperature control module to work or not work. The gravity heat row 211 is L-shaped and is of a sheet structure, a horizontally installed condensation end (namely, a horizontal end) of the gravity heat row 211 is fixedly connected with a bottom heat absorption plate of the semiconductor refrigeration assembly 212 through a fixed connecting piece, a vertical heat transfer end (namely, a vertical end) of the gravity heat row 211 penetrates through an inner box end plate and extends into a battery of an inner box, a heating sheet 213 is arranged in a manner of being attached to the vertical heat transfer end of the gravity heat row 211, and the heating sheet and the heat transfer end of the gravity heat row 211 penetrate through a vertical gap between two rows of battery packs 5 together and extend to the bottom of the inner box. The sealing of the box body 1 needs to be done by using the glue pouring and other processes at the junction where the gravity heat radiator 211 penetrates out of the end plate of the inner box. When the connecting bolts among the clamping plates 13, the mounting plates and the partition plates 17 of the inner box are tightened, the battery pack 5 clamps the gravity hot row 211 assembly 21 inserted into the battery, and the pressing mounting requirements of the battery are guaranteed.

It needs to be further explained that, in order to ensure that the explosion venting gas of the inner box can be discharged in time, a gas collecting cavity 4 is additionally arranged above the heat dissipation cavity 22 in the shell, the gas collecting cavity 4 is isolated into a closed space by a partition plate 17 alone, and a gas inlet is arranged on the partition plate 17 at the bottom of the gas collecting cavity 4 and is communicated with the explosion venting channel 18 of the inner box through a gas transmission pipe. Be provided with gas collection unit in gas collection chamber 4, gas collection unit includes adsorbed layer and collection layer, and the adsorbed layer is laid in baffle 17 top, can adopt adsorbing materials such as ceramic ball, active carbon, molecular sieve, adsorbent resin, graphite will let out explode that gas carries out preliminary adsorption treatment and carries out certain cooling simultaneously. And the collecting layer can adopt sealed rubber gas collecting bag, also can add baffle 17 and set up the gas vent on baffle 17 in the top of adsorbed layer, carry out the drainage with the gas after the adsorption treatment and get into the collecting layer and collect, when the gas volume reaches a certain amount, can be ejecting with the roof of shell, reach and let out the mesh of exploding the warning.

It is further noted that the trapping layer described above may also be ignited and released by a high-burn gas ignition assembly, which may be a commercially available ignition product. The purpose is to ignite and release the explosion venting gas which is absorbed and cooled, thereby achieving the purpose of purification treatment.

It should be further noted that the inner cavity of the housing may be isolated from a connection control cavity 3, which is mainly used for installing and connecting devices such as a busbar, an external plug, a BMS, an inverter module, etc., and is used for connecting external power and signal cables of the battery box, etc.

It should be further noted that the gas collecting chamber 4, the heat dissipation chamber 22 and the connection control chamber 3 can be disposed inside the housing or outside the housing according to the above-mentioned embodiments, and the connection control chamber 3 can be disposed on the base, which is mainly convenient for realizing the functions thereof. The small-sized discrete battery box can be combined and used through cables or two-pole butt joint to form a combined battery box, so that high-capacity energy storage is realized.

The structure can also show that the small-sized discrete battery box can independently operate in the aspects of heat dissipation, fire protection, energy management and the like, and can also operate in a cooperative manner, and meanwhile, the field safety management and control and the daily maintenance are facilitated. When the external environment temperature is low, the temperature of the battery pack 5 is not high, the heat-insulating interlayer 19 can maintain the temperature of the battery, and the battery can be heated by the heating sheet 213 in the temperature management unit 2; under the condition that the ambient temperature is high, when the battery slowly rises to reach a certain temperature, the semiconductor refrigeration assembly 212 is started to radiate the heat generated by the battery, so that the battery is ensured to work in a specified temperature range.

Specifically, the method for managing the temperature of the separated battery box with low energy consumption can be realized by the following steps:

1) the inner box is insulated and the external thermal radiation is isolated by the heat insulation interlayer 19 formed between the inner box and the outer shell, so that the external heat cannot be transferred into the inner box, and the battery pack 5 is not influenced by the external temperature during operation;

2) the temperature control module of the temperature management unit 2 identifies the working environment temperature of the battery pack 5 in the inner box, when the environment temperature is lower than a set temperature value, the temperature control module starts the gravity heat bar 211 assembly 21 to start heating, so that the working environment temperature of the battery pack 5 reaches the set temperature value, the heat insulation interlayer 19 insulates the inner box, and the heating time of the gravity heat bar 211 assembly 21 is shortened; when the ambient temperature is higher than the set temperature value, the temperature control module starts the semiconductor refrigeration assembly 212, the gravity heat rejection 211 assembly 21 transfers the heat released by the battery pack 5 to the semiconductor refrigeration assembly 212 and cools the battery pack 5 through the semiconductor refrigeration assembly 212, so that the battery pack 5 recovers the set temperature range; the method specifically comprises the following steps:

2.1) identifying the working environment temperature of the battery pack 5 in the inner box by a temperature control module of the temperature management unit 2, and performing the step 2.2) when the environment temperature is lower than a set temperature value; when the environmental temperature is higher than the set temperature value, performing step 2.3);

2.2) the temperature control module starts the heating sheet 213 of the gravity hot row 211 assembly 21 to start heating, and the gravity hot row 211 is used as a temperature conducting medium to horizontally transfer heat to the battery packs 5 at two sides, so that the working environment temperature of the battery packs 5 reaches a set temperature value, and meanwhile, the heat preservation interlayer 19 preserves the heat of the inner box, thereby reducing the heating time of the heating sheet 213;

2.3) the temperature control module starts the semiconductor refrigeration component 212, the high-energy heat released by the battery pack 5 transfers the heat to the semiconductor refrigeration component 212 from bottom to top through the heat conduction performance of the gravity heat bar 211, the semiconductor refrigeration component 212 absorbs and cools the heat transferred by the gravity heat bar 211, the condensate of the gravity heat bar 211 moves downwards by gravity after being cooled, the heat is transferred from bottom to top after repeated heat absorption, the battery pack 5 is enabled to recover to a set temperature range, meanwhile, the heat preservation interlayer 19 preserves the heat of the inner box, the refrigeration working time of the semiconductor refrigeration component 212 is reduced, and the energy consumption is reduced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the utility model without departing from the spirit and scope of the utility model, which is to be covered by the claims.

It will be appreciated by those skilled in the art that the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the utility model are intended to be embraced therein.

Claims (12)

1. The utility model provides a small-size discrete battery box, includes the box, its characterized in that: the box body comprises an inner box and a shell arranged outside the inner box, and a heat-insulating interlayer is formed between the inner box and the shell; the battery pack is arranged in the inner box, and the temperature management unit is arranged outside the inner box in the shell;

the temperature management unit comprises a gravity heat dissipation assembly, a semiconductor refrigeration assembly and a temperature control module; the gravity heat dissipation assembly and the semiconductor refrigeration assembly are respectively and electrically connected with the temperature control module; the condensation end of the gravity hot-row component is connected with the semiconductor refrigeration component, the semiconductor refrigeration component is arranged on the outer side of the inner box, and the heat transfer end of the gravity hot-row component penetrates through a gap between adjacent battery packs from one side of the inner box to extend to the other side of the inner box.

2. The small discrete battery box according to claim 1, wherein: the gravity hot-row assembly comprises a gravity hot-row and heating pieces, the heating pieces are arranged between every two gravity hot-rows to form a sandwich structure, the heating pieces are connected with the temperature control module, and the condensation ends of the gravity hot-rows are connected with the semiconductor refrigeration assembly.

3. The small discrete battery box according to claim 2, wherein: the gravity heat bar is L-shaped, and the horizontal end of the gravity heat bar is a condensation end and is connected with the semiconductor refrigeration assembly; the vertical end of the gravity heat row is a gap through which the heat transfer end penetrates between the battery packs.

4. The small discrete battery box according to claim 1, wherein: the shell inner chamber still is equipped with the gas collection chamber in the outside of inner box or the shell outside, the gas is collected the intracavity and is provided with the gas collection unit, the gas collection unit is including range upon range of adsorption layer and the collection layer that sets up.

5. The small discrete battery box according to claim 4, wherein: the adsorption layer is one or a mixture of more of ceramic balls, activated carbon, molecular sieves, adsorption resin and graphite; the collection layer is a closed gas collection bag or a high-combustion gas ignition assembly.

6. The small discrete battery box according to claim 4, wherein: a clearance is reserved between the inner wall of the inner box and the battery pack to form an explosion venting channel; and the explosion venting channel is communicated with the air inlet of the gas collecting cavity through a gas transmission pipe.

7. The small discrete battery box according to claim 6, wherein: the inner cavity of the shell is arranged outside the inner box or outside the shell, the heat dissipation cavity is arranged between the inner box and the gas collection cavity, and the semiconductor refrigeration assembly is arranged in the heat dissipation cavity; the side wall of the heat dissipation cavity is provided with a waterproof and dustproof assembly; the gas transmission pipe penetrates through the heat dissipation cavity and extends to the gas collection cavity.

8. The small discrete battery box according to claim 7, wherein: still be provided with the connection control chamber on the box, be provided with the connection control subassembly in the connection control chamber.

9. The small discrete battery box according to claim 1, wherein: the heat-insulating interlayer is filled with heat-insulating cotton or phase-change material with a phase-change temperature point of 37 ℃, or ceramic balls or activated carbon.

10. The small discrete battery box according to claim 1, wherein: the battery pack comprises a plurality of columns of batteries which are vertically arranged, every two adjacent batteries in the horizontal direction are placed back to back, two columns of batteries which are vertically arranged are separated through a gravity hot-row assembly, and two adjacent batteries are separated through a partition plate.

11. The small discrete battery box according to claim 1, wherein: the box sets up on the base, the below of base is provided with a plurality of removal truckles group.

12. A combined battery box, characterized in that, it comprises a plurality of small-sized separate battery boxes according to any one of claims 1 to 11, and the small-sized separate battery boxes are inserted through cable terminals.

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