CN220914317U - Whole package power battery - Google Patents

Abstract

The utility model discloses a whole package power battery, and relates to the technical field of power batteries. The whole package power battery includes battery package main part, electric interface mechanism, circuit breaking unit, management unit, low voltage module and high voltage module, electric interface mechanism sets up in the front portion of battery package main part, circuit breaking unit connects on electric interface mechanism, management unit sets up in the front portion of battery package main part, management unit connects on electric interface mechanism, low voltage module sets up in the inside lower part of battery package main part, low voltage module passes through the low voltage pencil and is connected to the management unit, high voltage module sets up in the inside upper portion of battery package main part, establish ties each other through the aluminium row between the high voltage module, and establish ties between passing through aluminium row and the low voltage module. The high-voltage module and the low-voltage module in the whole package power battery have no cross, and the whole EMC performance is relatively good.

Description

Whole package power battery

Technical Field

The utility model relates to the technical field of power batteries, in particular to a whole package power battery.

Background

The power battery is used as one of the core parts of the electric automobile and plays a role of main energy output. The energy density is an important parameter of the power cell and represents how much power is stored in a unit volume or unit weight power cell pack. Under the same weight or the same volume, the larger the energy density is, the more the energy stored in the power battery pack is represented by the energy density, the more the electric quantity can be discharged, and the longer the corresponding electric automobile can run.

How to increase the energy density of the battery pack is particularly important in the design of power batteries, and the current mainstream design trend is to design electrical components by reducing structural members and limiting spaces as much as possible and multiple discharge cores in a limited space.

The design space of the whole package for electric components is smaller and smaller, how to make full use of the remaining space to skillfully arrange the whole package electric scheme is a difficult problem to be solved by electric engineers, and most of the existing electric schemes can cross high voltage and low voltage when being arranged, and as a result, the EMC (electromagnetic compatibility) performance of the whole package is likely to be poor.

Disclosure of utility model

The utility model aims to solve at least one of the technical problems in the related art to a certain extent, and can improve the energy density of the whole package of power battery on the premise of not influencing the EMC performance of the whole package of power battery.

To this end, embodiments of the present utility model provide an integral package power cell.

The full pack power battery according to an embodiment of the present utility model includes: a battery pack body; an electrical interface mechanism provided at a front portion of the battery pack body; a circuit breaking unit provided at a front of the battery pack body, the circuit breaking unit being connected to the electrical interface mechanism; a management unit provided at a front portion of the battery pack body, the management unit being connected to the electrical interface mechanism; a low voltage module disposed at a lower portion inside the battery pack body, the low voltage module being connected to the management unit through a low voltage harness; the high-voltage module is arranged at the upper part of the inside of the battery pack body, and the high-voltage modules are connected in series through aluminum bars and connected in series through the aluminum bars and the low-voltage module.

According to the whole package power battery disclosed by the embodiment of the utility model, the electric interface mechanism, the circuit breaking unit and the management unit are arranged at the front part of the battery package main body, the high-voltage module is arranged at the upper part of the interior of the battery package main body, the low-voltage module is arranged at the lower part of the interior of the battery package main body, the high-voltage and low-voltage are not crossed, and the EMC performance of the whole package is relatively good.

In some embodiments, the electrical interface mechanism includes a discharge port, a quick charge port, and a manual switch connection port; the discharging port, the management unit and the low-voltage module are sequentially communicated, the quick charging port is communicated with the high-voltage module, and the manual switch connection port is communicated with the circuit breaking unit.

In some embodiments, the electrical interface mechanism further comprises an external low pressure communication port in communication with the low pressure module.

In some embodiments, the management unit includes a master manager and two slave managers, the master manager is electrically connected to the two slave managers, and the two slave managers are electrically connected to the high voltage module and the low voltage module, respectively.

In some embodiments, the circuit breaking unit includes an integrated circuit breaker provided at a front of the battery pack body, and a circuit breaking contactor electrically connected with the high voltage module through the circuit breaking contactor.

In some embodiments, the integral package power cell further comprises a contact assembly comprising a main positive contactor, a main negative contactor, and a fast charge negative contactor. The main positive contactor is connected in series with the positive electrode of the charging end of the high-voltage module, the main negative contactor is connected in series with the negative electrode of the discharging end of the high-voltage module, and the quick-charging negative contactor is connected in series with the negative electrode of the charging end of the high-voltage module.

In some embodiments, the integral package power cell further comprises the contact assembly further comprising a pre-charge contactor and a heating contactor. The pre-charging contactor is connected in series with the positive electrode of the discharge end of the high-voltage module, the heating contactor is connected in series with the negative electrode of the discharge end of the high-voltage module, and the heating contactor is connected in parallel with the main negative contactor.

In some embodiments, the integral package power cell further comprises a fuse assembly comprising a thermal fuse and a primary fuse. The heating fuse is connected in series on the circuit of the heating contactor, and the main fuse is connected in series on the circuit of the quick charging port.

In some embodiments, the integral package power cell further comprises a current sensor in series on the line of the main fuse and a precharge resistor in series on the line of the precharge contactor.

In some embodiments, the full pack power cell further comprises a copper bar disposed within the cell pack body, the copper bar connecting the fast charge negative contactor and the disconnect unit.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an integral package power cell in accordance with an embodiment of the present utility model.

Fig. 2 is another schematic diagram of an integral package power cell in accordance with one embodiment of the present utility model.

Fig. 3 is yet another schematic diagram of an integral package power cell in accordance with an embodiment of the present utility model.

Fig. 4 is a schematic view of copper bars in an integral package power cell according to one embodiment of the utility model.

Reference numerals:

The full pack power battery 100, the battery pack body 10, the electrical interface mechanism 20, the discharge port 21, the quick charge port 22, the manual switch connection port 23, the external low voltage communication port 24, the breaking unit 30, the management unit 40, the low voltage module 50, the low voltage harness 51, the high voltage module 60, the aluminum bar 61, the contact assembly 70, the main positive contactor 71, the main negative contactor 72, the quick charge negative contactor 73, the pre-charge contactor 74, the heating contactor 75, the fusing assembly 80, the heating fuse 81, the main fuse 82, the current sensor 91, the pre-charge resistor 92, the copper bar 93, the soft copper bar portion 94, and the hard copper bar portion 95.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 4, the full pack power battery 100 according to the embodiment of the present utility model includes a battery pack body 10, an electrical interface mechanism 20, a breaking unit 30, a management unit 40, a low voltage module 50, and a high voltage module 60.

The electrical interface mechanism 20 is provided at the front of the pack body 10, and in particular, as shown in fig. 1 to 3, in the whole pack power battery 100 of the present utility model, the electrical interface mechanism 20 is provided at the front of the pack body 10, thereby facilitating the user to conveniently charge and observe the use of the whole pack power battery 100.

The breaking unit 30 is provided at the front of the pack body 10, and the breaking unit 30 is connected to the electrical interface mechanism 20. The management unit 40 is provided at the front of the pack body 10, and the management unit 40 is connected to the electrical interface mechanism 20.

Specifically, as shown in fig. 1 to 3, the breaking unit 30 and the management unit 40 are also provided at the front of the pack body 10, thereby facilitating a user's quick power-off process for the entire pack power battery 100.

The low voltage module 50 is disposed at the lower part of the inside of the pack body 10, and the low voltage module 50 is connected to the management unit 40 through the low voltage harness 51. The high voltage modules 60 are disposed at the upper part of the inside of the battery pack body 10, and the high voltage modules 60 are connected in series with each other through the aluminum bars 61 and are connected in series with the low voltage modules 50 through the aluminum bars 61.

It will be appreciated that in the full pack power battery 100 of the present utility model, the aluminum row 61 has 89 contact terminals in total, extending from the front of the pack body 10 to the rear thereof, and the last 1 contact terminal is used to connect the high voltage module 60 and the low voltage module 50.

It will be appreciated that in the whole pack power battery 100 of the present utility model, there are two low voltage bundles 51, and the two low voltage bundles 51 are split into two streams, which are respectively gathered to the front management unit 40 from both sides of the inside of the battery pack body 10.

According to the whole pack power battery 100 of the embodiment of the utility model, the electric interface mechanism 20, the breaking unit 30 and the management unit 40 are arranged at the front part of the battery pack main body 10, the high-voltage module 60 is arranged at the upper part of the interior of the battery pack main body 10, the low-voltage module 50 is arranged at the lower part of the interior of the battery pack main body 10, the high-voltage and low-voltage are not crossed, and the EMC performance of the whole pack is relatively good.

In some embodiments, as shown in fig. 1-2, electrical interface mechanism 20 includes a discharge port 21, a quick charge port 22, and a manual switch connection port 23. The discharge port 21, the management unit 40 and the low-voltage module 50 are sequentially communicated, the quick charge port 22 is communicated with the high-voltage module 60, and the manual switch connection port 23 is communicated with the breaking unit 30.

Specifically, as shown in fig. 1-2, the fast charge port 22 communicates with the high voltage module 60, and the entire pack of power cells 100 may be charged through the fast charge port 22. The discharging port 21 is used for outputting the electric quantity in the whole package of power batteries 100, and the manual switch connection port 23 is used for opening and closing the whole package of power batteries 100, so that the safety of the whole package of power batteries 100 is effectively improved.

In some embodiments, as shown in fig. 1-2, the electrical interface mechanism 20 further includes an external low pressure communication port 24, the external low pressure communication port 24 being in communication with the low pressure die set 50.

Specifically, as shown in fig. 1 to 2, the external low pressure communication port 24 is provided at the front of the pack body 10, and a user can check the use condition of the low pressure module 50 through the external low pressure communication port 24.

In some embodiments, the management unit 40 includes one master manager (not shown) and two slave managers (not shown), the master manager being electrically connected to the two slave managers, respectively, and the two slave managers being electrically connected to the high voltage module 60 and the low voltage module 50, respectively.

It can be appreciated that in the whole package of power cells 100 of the present utility model, the whole package of power cells 100 can be managed in a hierarchical manner by adopting one master and two slaves, so as to improve the safety of the whole package of power cells 100.

In some embodiments, the breaking unit 30 includes an integrated circuit breaker (not shown) provided at the front of the battery pack body 10 and a breaking contactor (not shown) electrically connected with the high voltage module 60 through the breaking contactor.

It can be appreciated that in the whole pack power battery 100 of the present utility model, the safety of the high voltage module 60 in the whole pack power battery 100 is improved by managing the high voltage module 60 of the whole pack power battery 100 using the integrated circuit breaker and the circuit breaker contactor.

In some embodiments, as shown in fig. 3, the integral package power cell 100 further includes a contact assembly 70, the contact assembly 70 including a main positive contactor 71, a main negative contactor 72, and a quick charge negative contactor 73. The main positive contactor 71 is connected in series with the positive electrode of the charging end of the high voltage module 60, the main negative contactor 72 is connected in series with the negative electrode of the discharging end of the high voltage module 60, and the quick charge negative contactor 73 is connected in series with the negative electrode of the charging end of the high voltage module 60.

Specifically, as shown in fig. 3, the front part of the battery pack body 10 in the whole pack power battery 100 is a charge and discharge terminal, and the main positive contactor 71 connects the charge and discharge terminal and the positive electrode of the charge terminal of the high voltage module 60 for charging the high voltage module 60. The main negative contactor 72 connects the charge and discharge terminal with the negative electrode of the discharge terminal of the high voltage module 60 for outputting electric power to the outside. The fast charge-negative contactor 73 connects the charge-discharge terminal with the negative electrode of the charge terminal of the high voltage module 60 to form a closed circuit.

In some embodiments, as shown in fig. 3, the integral package power cell 100 further includes a contact assembly 70 further including a pre-charge contactor 74 and a heating contactor 75. The pre-charge contactor 74 is connected in series to the positive electrode of the discharge end of the high voltage module 60, the heating contactor 75 is connected in series to the negative electrode of the discharge end of the high voltage module 60, and the heating contactor 75 is connected in parallel to the main negative contactor 72.

Specifically, as shown in fig. 3, the front part of the battery pack body 10 in the whole pack power battery 100 is a charge-discharge terminal, and the pre-charge contactor 74 connects the charge-discharge terminal with the positive electrode of the discharge terminal of the high-voltage module 60 for forming a closed circuit. The heating contactor 75 connects the charge and discharge terminal with the negative electrode at the discharge terminal of the high voltage module 60 for forming a closed circuit.

In some embodiments, as shown in fig. 3, the integral package power battery 100 further includes a fuse assembly 80, the fuse assembly 80 including a thermal fuse 81 and a main fuse 82. The heating fuse 81 is connected in series to the line of the heating contactor 75, and the main fuse 82 is connected in series to the line of the quick charge 22.

Specifically, as shown in fig. 3, the heating fuse 81 is connected in series to the line of the heating contactor 75, so that when the current passing through the line of the heating contactor 75 is too large, the heating fuse 81 is heated to generate disconnection, thereby effectively improving the safety of the whole package of the power battery 100.

Specifically, as shown in fig. 3, the main fuse 82 is connected in series to the line of the fast charging port 22, so that when the current passing through the charging line is too large, the main fuse 82 is heated to be broken, thereby effectively improving the safety of the whole package of the power battery 100.

In some embodiments, as shown in fig. 3, the integral package power battery 100 further includes a current sensor 91 and a pre-charge resistor 92, the current sensor 91 being connected in series on the line of the main fuse 82, the pre-charge resistor 92 being connected in series on the line of the pre-charge contactor 74.

Specifically, as shown in fig. 3, the current sensor 91 is connected in series to the line of the fast charging port 22, so that it is able to effectively detect whether the current passing through the line of the fast charging port 22 is within the safety range, which is beneficial to improving the safety of the whole package of the power battery 100.

Specifically, as shown in fig. 3, the precharge resistor 92 is connected in series with the line of the precharge contactor 74, thereby facilitating a reduction in the current on the line of the precharge contactor 74 and an improvement in the safety during charging.

In some embodiments, as shown in fig. 4, the whole package power battery 100 further includes a copper bar 93, the copper bar 93 is disposed in the battery package body 10, and the copper bar 93 connects the quick charge negative contactor 73 and the circuit breaking unit 30.

It will be appreciated that the copper bar 93 is formed integrally by the lap welding of the soft copper bar portion 94 and the hard copper bar portion 95, and such a design is superior to the conventional high-voltage junction box junction, thereby reducing the development of new components and having obvious cost advantages.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean 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 utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. An integral pack power cell comprising:

a battery pack body;

An electrical interface mechanism provided at a front portion of the battery pack body;

A circuit breaking unit provided at a front of the battery pack body, the circuit breaking unit being connected to the electrical interface mechanism;

a management unit provided at a front portion of the battery pack body, the management unit being connected to the electrical interface mechanism;

A low voltage module disposed at a lower portion inside the battery pack body, the low voltage module being connected to the management unit through a low voltage harness;

The high-voltage module is arranged at the upper part of the inside of the battery pack body, and the high-voltage modules are connected in series through aluminum bars and connected in series through the aluminum bars and the low-voltage module.

2. The full pack power cell of claim 1, wherein the electrical interface mechanism comprises a discharge port, a fast charge port, and a manual switch connection port;

The discharging port, the management unit and the low-voltage module are sequentially communicated, the quick charging port is communicated with the high-voltage module, and the manual switch connection port is communicated with the circuit breaking unit.

3. The full pack power cell of claim 2, wherein the electrical interface mechanism further comprises an external low pressure communication port, the external low pressure communication port in communication with the low pressure module.

4. The full pack power cell of claim 1, wherein the management unit comprises a master manager and two slave managers, the master manager being electrically connected to the two slave managers, respectively, and the two slave managers being electrically connected to the high voltage module and the low voltage module, respectively.

5. The full pack power battery of claim 1, wherein the circuit breaking unit includes an integrated circuit breaker provided at a front portion of the battery pack body and a circuit breaking contactor electrically connected with the high voltage module through the circuit breaking contactor.

6. The full pack power cell of claim 2, further comprising:

The contact assembly comprises a main positive contactor, a main negative contactor and a quick charge negative contactor;

The main positive contactor is connected in series with the positive electrode of the charging end of the high-voltage module, the main negative contactor is connected in series with the negative electrode of the discharging end of the high-voltage module, and the quick-charging negative contactor is connected in series with the negative electrode of the charging end of the high-voltage module.

7. The full pack power cell of claim 6, further comprising:

The contact assembly further comprises a pre-charge contactor and a heating contactor;

The pre-charging contactor is connected in series with the positive electrode of the discharge end of the high-voltage module, the heating contactor is connected in series with the negative electrode of the discharge end of the high-voltage module, and the heating contactor is connected in parallel with the main negative contactor.

8. The full pack power cell of claim 7, further comprising:

A fuse assembly comprising a thermal fuse and a main fuse;

The heating fuse is connected in series on the circuit of the heating contactor, and the main fuse is connected in series on the circuit of the quick charging port.

9. The full pack power cell of claim 8, further comprising:

The current sensor is connected in series with the circuit of the main fuse, and the pre-charging resistor is connected in series with the circuit of the pre-charging contactor.

10. The full pack power cell of claim 6, further comprising:

the copper bar is arranged in the battery pack main body and is connected with the quick charge negative contactor and the circuit breaking unit.