New energy automobile battery setting method and automobile battery pack

Abstract

The invention belongs to the field of new energy automobiles, and discloses a new energy automobile battery setting method, which can control the significant expansion or recovery of the output current of a new energy battery through the on-off of a switch, thereby greatly improving the power performance and acceleration performance of the new energy automobile. The power-type battery pack is connected in series between the pair of output nodes through the first switch, so that the power-type battery pack and the energy-type battery pack can be disconnected and connected in parallel, the power-type battery pack and the energy-type battery pack are thermally isolated, and the power-type battery pack has better charging and discharging capability than the energy-type battery pack, so that the power-type battery pack can be charged and discharged based on actual requirements. The power-type battery pack and the energy-type battery pack are connected in parallel by switching on and off the first switch, so that the total output current of the new energy battery can be increased, and the power-type battery pack and the energy-type battery pack cannot generate mutual heat influence due to cold isolation. The invention further discloses the automobile battery pack based on the setting method.

Description

Technical Field

[0001] The present invention belongs to the field of new energy vehicles, and in particular relates to a new energy vehicle battery arrangement method and a vehicle battery pack. Background Art

[0002] In recent years, the development of new energy vehicles in the market is in full swing. They have many advantages such as lower carbon emissions throughout their life cycle, more powerful power systems, and smarter driving experience. In addition, against the background of rising costs of traditional fuel vehicles, consumer demand for new energy vehicles is gradually increasing.

[0003] At present, in order to make new energy vehicles have a long service life to achieve a longer total vehicle mileage, have a better cycle life and obtain more charging and discharging times, new energy vehicles all use energy-type battery packs as energy supply elements to store more energy.

[0004] However, the above implementation has the following shortcomings: although the energy battery can store a large amount of energy, its charging and discharging capacity is poor, resulting in limited efficiency when the car is charging, and it is difficult to generate a large enough current in a short period of time, thereby limiting the further improvement of the power performance and acceleration performance of new energy vehicles; in addition, since the energy supply components of new energy vehicles are directly exposed to the ambient temperature, it means that the operating temperature of the energy battery sometimes exceeds its allowable normal range. For excessively high operating conditions, a cooling medium circulation system is used to cool the energy battery. However, for excessively low operating conditions, there is still a lack of effective means to quickly heat up the energy battery. Excessively low operating temperatures will make it difficult for the energy battery to discharge normally, resulting in repeated high and low temperature shocks, which greatly reduces the service life of the energy battery. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a new energy vehicle battery setting method and a vehicle battery pack, which greatly improves the power performance and acceleration performance of the new energy vehicle by setting a power battery pack in parallel with an energy battery pack and controlling the expansion or recovery of the output current through switch opening and closing.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for setting up batteries for a new energy vehicle, wherein the new energy vehicle includes an energy type battery pack, and the energy type battery pack provides energy for the new energy vehicle through a pair of output nodes. The method is characterized in that: a power type battery pack is set, and the power type battery pack is connected in series between the pair of output nodes through a first switch, so that the power type battery pack and the energy type battery pack form a disconnectable parallel connection, and the power type battery pack and the energy type battery pack are thermally isolated.

[0008] Preferably, the energy-type battery pack includes a plurality of consecutively adjacent energy battery cells, and a plurality of thermally conductive connectors are provided, each thermally conductive connector correspondingly thermally connects two adjacent energy battery cells, and a plurality of thermally conductive connectors thermally connect a plurality of energy battery cells, and the plurality of thermally conductive connectors are connected in series and then connected in series between a pair of output nodes, so that the plurality of thermally conductive connectors and the energy-type battery pack form a disconnectable parallel connection.

[0009] An automotive battery pack based on the above-mentioned setting method is characterized in that it includes: a battery shell having a closed shell bottom plate and a shell enclosure, the battery shell forming an energy output chamber and a power output chamber that are thermally isolated from each other, the energy output chamber accommodating an energy type battery pack, the power output chamber accommodating a power type battery pack, a first switch and a parallel bus, both of which are arranged inside the battery shell, the power type battery pack is electrically connected to the parallel bus through the first switch, and the energy type battery pack is electrically connected to the parallel bus.

[0010] Preferably, the present invention further comprises a second switch and a heat-conducting connector, the energy-type battery pack is heat-conductingly connected to the heat-conducting connector, and then electrically connected to the energy bus through the second switch.

[0011] Preferably, the bottom plate of the shell is hollow and is formed with a cooling channel, the cooling channel has an inlet and an outlet, and both the inlet and the outlet are connected to an external cooling medium circulation device.

[0012] Preferably, the energy output chamber and the power output chamber are thermally isolated by a double-layer hollow insulation partition, and the hollow space of the double-layer hollow insulation partition is a vacuum.

[0013] Furthermore, the present invention also includes a power collector plate, the wiring forms an electrically connected power series path and a pair of power node parallel terminals, and the power series path is connected in series with a first switch; an energy collector plate, the wiring forms an electrically connected energy series path and a pair of energy node parallel terminals; wherein the number of parallel bus bars is a pair, the power type battery pack is electrically connected to a pair of parallel bus bars through the power series path and a pair of power node parallel terminals, and the energy type battery pack is electrically connected to a pair of parallel bus bars through the energy series path and a pair of energy node parallel terminals.

[0014] Furthermore, the power battery pack includes a plurality of power battery cells, the energy battery pack includes a plurality of energy battery cells, the plurality of power battery cells are connected in series through a power series path, and the plurality of energy battery cells are connected in series through an energy series path.

[0015] Furthermore, there are multiple thermally conductive connectors, each of which thermally connects two adjacent energy battery cells. The energy collecting plate also has a thermally conductive series path, the thermally conductive series path is connected in series with a second switch, and the thermally conductive series path has multiple thermally conductive inserts connected in series. The multiple thermally conductive inserts are thermally connected to the multiple thermally conductive connectors, and the thermally conductive series path, the energy series path and the power series path are connected in parallel.

[0016] Preferably, the shell enclosure is made of plastic, the shell bottom plate is made of metal, and the shell bottom plate is tightly combined with the shell enclosure by means of a plastic insert.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Because the battery setting method of the new energy vehicle of the present invention sets a power type battery pack, and connects the power type battery pack in series between a pair of output nodes through the first switch, so that the power type battery pack and the energy type battery pack form a disconnectable parallel connection, and the power type battery pack and the energy type battery pack are thermally isolated. The power type battery pack has a much better charging and discharging capacity than the energy type battery pack. Therefore, based on actual needs, the power type battery pack and the energy type battery pack are connected in parallel by opening the first switch, which can increase the total output current of the battery of the new energy. On the other hand, through the physical properties and corresponding settings of the power type battery pack, most of the total output current of the circuit after parallel connection is provided by the power type battery pack, and the cold isolation prevents the power type battery pack and the energy type battery pack from having mutual thermal influence. Therefore, the present invention can control the significant expansion or recovery of the total output current of the battery of the new energy by opening the first switch, thereby greatly improving the power performance and acceleration performance of the new energy vehicle, and can greatly avoid the large current flowing through the energy type battery pack, thereby causing the internal temperature of the energy type battery pack to rise too fast and shorten the service life.

[0019] 2. Because in the present invention, the energy-type battery pack includes a plurality of consecutive adjacent energy battery cells, and a plurality of heat-conductive connectors are provided, each heat-conductive connector correspondingly connects two adjacent energy battery cells through heat conduction, and a plurality of heat-conductive connectors heat-conductively connect a plurality of energy battery cells, and the plurality of heat-conductive connectors are connected in series and then connected between a pair of output nodes, so that the plurality of heat-conductive connectors and the energy-type battery pack form a disconnectable parallel connection. Therefore, the present invention can make the total output current of the new energy battery flow through the heat-conductive connector by switching on and off, so that the heat-conductive connector generates a current thermal effect under the action of the current, and conducts heat to each energy battery cell through the heat-conductive connector, thereby causing the energy-type battery cell to heat up rapidly.

[0020] 3. Because the automotive battery pack of the present invention includes a battery shell, a first switch and a parallel bus, the battery shell has a closed shell bottom plate and a shell enclosure, the shell forms an energy output cavity and a power output cavity that are thermally isolated from each other, the energy output cavity accommodates an energy type battery group, the power output cavity accommodates a power type battery group, the first switch and the parallel bus are both arranged inside the battery shell, the power type battery group is electrically connected to the parallel bus through the first switch, and the energy type battery group is electrically connected to the parallel bus, therefore, the present invention can realize the above-mentioned battery setting method through the automotive battery pack.

[0021] 4. Because the shell bottom plate of the present invention is hollow and has a cooling channel, the cooling channel has an inlet and an outlet, both of which are connected to an external cooling medium circulation device. Therefore, the present invention embeds the power battery assembly and the energy battery assembly into the vehicle cooling system, that is, the cooling medium circulation system, through the shell bottom plate to achieve cooling of the battery pack.

[0022] 5. Because the present invention also includes a power collector plate and an energy collector plate, the power collector plate wiring forms an electrically connected power series path and a pair of power node parallel terminals, and the power series path is connected in series with a first switch; the energy collector plate wiring forms an electrically connected energy series path and a pair of energy node parallel terminals; the number of parallel busbars is a pair, the power type battery pack is electrically connected to a pair of parallel busbars through the power series path and a pair of power node parallel terminals, and the energy type battery pack is electrically connected to a pair of parallel busbars through the energy series path and a pair of energy node parallel terminals. Therefore, the first switch of the present invention can exist in the power collector plate in the form of a soft switch, so that the power type series path can be connected or disconnected through an external signal, thereby achieving a significant expansion or recovery of the battery output current of the new energy.

[0023] 6. Because the number of the heat-conductive connectors of the present invention is multiple, each heat-conductive connector corresponds to thermally connecting two adjacent energy battery cells, the energy collector plate also has a heat-conductive series path, the heat-conductive series path is connected in series with a second switch, and the heat-conductive series path has multiple heat-conductive inserts connected in series, the multiple heat-conductive inserts are thermally connected to the multiple heat-conductive connectors accordingly, and the heat-conductive series path, the energy series path and the power series path are connected in parallel. Therefore, the second switch of the present invention can exist in the energy collector plate in the form of a soft switch, so that the energy series path can be connected or disconnected through an external signal, and then the battery output current of the new energy generates heat for each energy-type battery cell through multiple heat-conductive connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of an automotive battery pack according to an embodiment of the present invention;

[0025] Figure 2 A bottom view of a housing upper cover of an embodiment of the present invention;

[0026] Figure 3 A three-dimensional diagram of a battery housing with the housing upper cover removed;

[0027] Figure 4 is a schematic diagram of a housing bottom plate of an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of an automobile battery pack with the housing upper cover removed according to an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the cooperation between a power battery pack and a power current collecting plate according to an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of an energy-type battery pack according to an embodiment of the present invention;

[0031] Figure 8 It is a schematic diagram of the cooperation between the energy type battery pack and the energy collecting plate according to an embodiment of the present invention.

[0032] In the figure: 100, automotive battery pack, 10, battery shell, 10a, energy output cavity, 10b, power output cavity, 11, shell bottom plate, 11a, inlet, 11b, outlet, 12, shell enclosure, 13, shell cover, 131, output terminal, 132, signal terminal, 133, parallel bus, 14, double-layer hollow insulation partition, 14a, vacuum insulation cavity, 20, power battery pack, 21, power battery cell, 30, energy battery pack, 31, energy battery cell, 40, thermal conductive connector, 50, energy collector plate, 51, energy node parallel terminal, 52, thermal conductive insert, 60, power collector plate, 61, power node parallel terminal. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and the accompanying drawings specifically illustrate the new energy vehicle battery setting method and the vehicle battery pack of the present invention. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0034] The new energy vehicle in this embodiment includes an energy type battery pack, and the energy type battery pack provides energy to the new energy vehicle through a pair of output nodes. The battery setting method of the new energy vehicle is:

[0035] A power battery pack is provided and connected in series between a pair of output nodes through a first switch, so that the power battery pack and the energy battery pack form a disconnectable parallel connection and thermally isolate the power battery pack and the energy battery pack.

[0036] The energy-type battery pack includes a plurality of consecutive adjacent energy battery cells, and a plurality of heat-conductive connectors are provided, each heat-conductive connector correspondingly connects two adjacent energy battery cells by heat-conductive connection, and a plurality of heat-conductive connectors heat-conductively connect a plurality of energy battery cells, and the plurality of heat-conductive connectors are connected in series and then connected between a pair of output nodes, so that the plurality of heat-conductive connectors and the energy-type battery pack form a disconnectable parallel connection. Specifically, the power-type battery pack, the energy-type battery pack, and the plurality of heat-conductive connectors connected in series form a parallel circuit, and the branch of the power-type battery pack is controlled by a first switch to be connected in parallel or disconnected with the energy-type battery pack; and the plurality of heat-conductive connectors connected in series are controlled by a second switch to be connected in parallel or disconnected with the energy-type battery pack.

[0037] like Figure 1 As shown, the automotive battery pack in this embodiment, based on the above-mentioned new energy vehicle battery setting method, includes a battery housing 10, a power battery pack 20, an energy battery pack 30, a thermal conductive connector 40, an energy collector plate 50 and a power collector plate 60.

[0038] The battery housing 10 comprises a housing bottom plate 11 , a housing enclosure 12 and a housing cover 13 .

[0039] The shell enclosure 12 is made of plastic, the shell bottom plate 11 is made of metal, the shell bottom plate 11 is tightly combined with the shell enclosure 12 by means of plastic inserts, and the shell upper cover 13 is detachably arranged on the shell enclosure 12. Specifically, the shell bottom plate 11 and the shell enclosure 12 enclose an inner cavity, and the shell upper cover 13 covers the inner cavity.

[0040] The inner cavity of the battery shell 10 forms an energy output cavity 10a and a power output cavity 10b which are thermally isolated from each other. The energy output cavity 10a accommodates an energy type battery pack 30, and the power output cavity 10b accommodates a power type battery pack 20. The energy output cavity 10a and the power output cavity 10b are thermally isolated by a double-layer hollow insulating partition 14 preset inside the battery shell 10, and the hollow of the double-layer hollow insulating partition 14 is a vacuum. Specifically, the double-layer hollow insulating partition is two parallel plates, and the edges of the plates are closed and connected to the inner wall of the shell enclosure 12, so that the two plates and the inner wall of the shell enclosure form a hollow insulating cavity 14a. The hollow insulating cavity 14a forms an insulating structure between the energy output cavity 10a and the power output cavity 10b by evacuating the vacuum.

[0041] Specifically, the shell cover 13 has an output terminal 131, a signal terminal 132 and a parallel bus 133. Specifically, the output terminal 131 and the signal terminal 132 are arranged on the surface of the shell cover 13 facing outward, and the parallel bus 133 is arranged on the surface of the shell cover 13 facing inward, and the number of the output terminal 131 and the parallel bus 133 are both two and they are correspondingly conductive. The two output terminals 131 are the physical implementation hardware of a pair of output nodes in the new energy vehicle battery setting method, and the signal terminal 132 is used to receive control signals from the outside.

[0042] like Figure 2 and Figure 3 As shown, the two parallel busbars 133 are both disposed inside the battery housing 10 . In this embodiment, the two parallel busbars 133 correspond to opposite sides of the inner cavity of the battery housing 10 .

[0043] like Figure 4 As shown, the shell bottom plate 11 is hollow and forms a cooling channel (not shown in the drawings). The cooling channel has an inlet 11a and an outlet 11b. The inlet 11a and the outlet 11b are both connected to the vehicle cooling system, that is, the external cooling medium circulation device.

[0044] like Figures 5 to 8 As shown, the power type battery pack 20 includes a plurality of power type battery cells 21 , and the energy type battery pack 50 includes a plurality of energy type battery cells 51 .

[0045] The power collector plate 60 is coupled to the power battery pack 20 circuit, and the power collector plate 60 is wired to form an electrically connected power series path (not shown in the drawings) and a pair of power node parallel terminals 61, and the power series path is connected in series with a first switch (not shown in the drawings).

[0046] The energy collector plate 50 is coupled to the energy battery pack 30 circuit. The energy collector plate 50 is wired to form an electrically connected energy series path (not shown in the drawings), a pair of energy node parallel terminals 51 and a plurality of heat-conducting inserts 52. Specifically, the heat-conducting inserts 52 are heat-conducting elements with a relatively small specific heat capacity.

[0047] The power type battery pack 20 is electrically connected to a pair of parallel buses 133 through a power series path and a pair of power node parallel terminals 61. Specifically, the pair of power node parallel terminals 61 are the output nodes of the power series path; and the pair of energy node parallel terminals 51 are the output nodes of the energy series path.

[0048] A plurality of energy-type battery cells 31 are connected in series in sequence through an energy series path, and a plurality of power-type battery cells 21 are connected in series through a power series path, that is, the energy-type battery pack 30 is electrically connected to a pair of parallel bus bars 133 through the energy series path and a pair of energy node parallel terminals 51, respectively; the power-type battery pack 20 is electrically connected to the output of the parallel bus bar 133 through the first switch in the power series path, and the energy-type battery pack 30 is electrically connected to the output of the parallel bus bar 133, thereby realizing the parallel connection of the power-type battery pack 20 and the energy-type battery pack 30.

[0049] There are multiple thermally conductive connectors 40, and each thermally conductive connector 40 thermally connects two adjacent energy battery cells 31. In the present embodiment, the energy battery cell 31 is a soft-pack battery, and the thermally conductive connector 40 is in an inverted "U". The two free ends of the thermally conductive connector 40 are thermally connected to the two adjacent soft-pack batteries respectively, and the bottom of the thermally conductive connector 40 is in thermal contact with the thermally conductive insert 52.

[0050] The energy collecting plate 50 also has a heat-conducting series path (not shown in the drawings) formed by connecting multiple heat-conducting inserts 52 in series in sequence. The heat-conducting series path is connected in series with a second switch (not shown in the drawings), that is, the energy battery pack 50 is thermally connected to the heat-conducting connector 40, and then electrically connected to the energy bus 133 through the second switch, so that the heat-conducting series path, the energy series path and the power series path are connected in parallel.

[0051] The above-mentioned implementation modes are preferred cases of the present invention and are not used to limit the protection scope of the present invention. Various deformations or modifications that can be made by ordinary technicians in this field without creative work within the scope of the attached claims are still within the protection scope of this patent.

Claims

1. A battery setting method for a new energy vehicle, wherein the new energy vehicle comprises an energy type battery pack, and the energy type battery pack provides energy for the new energy vehicle through a pair of output nodes, characterized in that: First, a power type battery group is provided, and the power type battery group is connected in series between the pair of output nodes through a first switch, so that the power type battery group and the energy type battery group form a disconnectable parallel connection; Then, the power type battery pack and the energy type battery pack are thermally isolated.

2. The method for setting up a new energy vehicle battery according to claim 1, characterized in that: in, The energy battery pack includes a plurality of consecutively adjacent energy battery cells, A plurality of heat-conducting connectors are provided, each of which connects two adjacent energy battery cells to each other through heat conduction, and the plurality of heat-conducting connectors connect the plurality of energy battery cells to each other through heat conduction, The plurality of heat-conducting connectors are connected in series and then connected in series between the pair of output nodes, so that the plurality of heat-conducting connectors and the energy-type battery pack form a disconnectable parallel connection.

3. An automotive battery pack based on the setting method according to claim 1 or 2, characterized in that: include: A battery housing has a closed housing bottom plate and a housing enclosure, wherein the battery housing forms an energy output chamber and a power output chamber which are thermally isolated from each other, wherein the energy output chamber contains the energy type battery pack, and wherein the power output chamber contains the power type battery pack. The first switch and the parallel bus are both arranged inside the battery housing, the power type battery pack is electrically connected to the parallel bus through the first switch, and the energy type battery pack is electrically connected to the parallel bus.

4. The automotive battery pack according to claim 3, characterized in that: Also includes: A second switch and a heat-conducting connector, the energy-type battery pack is heat-conductingly connected to the heat-conducting connector, and then electrically connected to the energy bus through the second switch.

5. The automotive battery pack according to claim 3, characterized in that: in, The shell bottom plate is hollow and is formed with a cooling channel. The cooling channel has an inlet and an outlet. Both the inlet and the outlet are connected to an external cooling medium circulation device.

6. The automotive battery pack according to claim 3, characterized in that: in, The energy output chamber and the power output chamber are thermally isolated by a double-layer hollow heat-insulating partition plate, and the hollow of the double-layer hollow heat-insulating partition plate is a vacuum.

7. The automotive battery pack according to claim 4, characterized in that: Also includes: A power collector plate, which is wired to form an electrically connected power series path and a pair of power node parallel terminals, wherein the power series path is connected in series with the first switch; An energy collector plate, wired to form an electrically connected energy series path and a pair of energy node parallel terminals; Among them, the number of parallel busbars is a pair, the power type battery pack is electrically connected to the pair of parallel busbars through the power series path and a pair of power node parallel terminals, and the energy type battery pack is electrically connected to the pair of parallel busbars through the energy series path and a pair of energy node parallel terminals.

8. The automotive battery pack according to claim 7, characterized in that: in, The power battery pack includes a plurality of power battery cells, and the energy battery pack includes a plurality of energy battery cells. The plurality of power-type battery cells are connected in series via the power series path, and the plurality of energy-type battery cells are connected in series via the energy series path.

9. The automotive battery pack according to claim 7, characterized in that: in, There are multiple thermally conductive connectors, each of which connects two adjacent energy battery cells to each other through thermal conductivity. The energy collector plate also has a heat-conducting series path, the heat-conducting series path is connected in series with the second switch, and the heat-conducting series path has a plurality of heat-conducting inserts connected in series, and the plurality of heat-conducting inserts are thermally connected to the plurality of heat-conducting connectors correspondingly. The heat conduction series path, the energy series path and the power series path are connected in parallel.

10. The automotive battery pack according to claim 3, characterized in that: in, The shell enclosure is made of plastic, the shell bottom plate is made of metal, the shell bottom plate is tightly combined with the shell enclosure by means of a plastic insert, the energy-type battery pack and the power-type battery pack are arranged on the shell bottom plate and filled with heat-conductive glue.

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